how to convert hours to minutes in excel

how to convert hours to minutes in excel

In this section, we want to convert military time to minutes. Follow the steps below to accomplish this. Can you please help me understand the logic behind multiplying the time with 1440? By that, one can easily understand the dedication level of another person. Do not need to remember neither the conversion factor nor the function, Kutools for Excel's Unit Conversion tool can help you easily deal with it. Please have a look at this article - Calculating time difference in Excel (elapsed time). The original data set contains a column of time/duration text that are in the following format. If negative it would return a blank. Thank You. Generic formula = A1 * 24 Explanation In the Excel time system, one 24-hour day is equal to 1. It offers: I've been using the Ablebits product for several years, Ultimate Suite turns Excel into what it should have always been, Ablebits occupies a unique place for Excel users. DELTA = TIME A - TIME B. if Delta is >0, than no problem, i will get the time difference and can be transformed to Text, etc. I am trying to show total hours as days and hours with this formula as it shows Days hours and minutes which is what I need. As you see, the formulas with cell references and corresponding text strings deliver identical results. Why is 5311 equal to 1 Hour 28 Minutes? Sometimes, you may need to convert time into the format that reads something like "# days, # hours, # minutes and # seconds". Then extract the last digit using the RIGHT function and count matches with "0". : How to Convert Minutes to Hours and Minutes in Excel, 5 Easy Methods to Convert Minutes to Hours and Minutes in Excel, 4. Converting hours and minutes (hh:mm) to minutes in an Excel spreadsheet is actually quite simple, once you know what to do. In my example, that was C3, which pairs with B3. Learn more about us. See screenshot: Click here to know more information about Unit Conversion. I haven't been able to find this conversion. You need to set the date format in the cell. To convert hours to minutes all you need to do is multiply the hours by 60: Or you could use the CONVERT Function: =CONVERT(B3,"hr","mn") Convert Minutes to Hours To convert minutes to hours all you need to do is divide the minutes by 60: Or you could use the CONVERT Function: =CONVERT(B4,"mn","hr") AutoMacro - VBA Code Generator Learn More 22:59 In addition, you will get the desired result. The QUOTIENT function is mainly used for data entry or accounting as it doesnt return any remainder. Then I pasted your formula, modified for all the row numbers in column E containing the data =SUM(--(RIGHT(TEXT(e3:e1748,"hh:mm"),1)="0")). Thank you. 22:30 We need to convert minutes into hours and minutes for our needs. In this section, we will use the TEXT function with a format to convert time to minutes. 18:48 To do that, well use a sample dataset overview as an example in Excel to understand easily. Decimal time has converted to hours and minutes successfully. To convert from hours : minutes : seconds format, use the INTfunction. I hope this will satisfy your needs. There is no conversion here. i need to change it to second time appreciate your help. To convert the time to decimal, multiply it by 24. . One interesting thing about military time is that there is no punctual mark between the hour and minute. Select the entire column (column C in my example) by selecting the column header. 5 Methods to Convert Time to Minutes in Excel 1. I thank you for reading and hope to see you again next week! In the formula shown, the formula in D5, copied down the table, is: = (B5 * 24) * C5 Generic formula = ( time * 24) * rate Explanation Excel times are stored as fractional parts of one day. , You can simply use the subtraction functionality of Excel to calculate time in hours and minutes. This tutorial will demonstrate how to convert minutes to hours and minutes in excel. 12:33:36 2 This article will show you some easy way to deal with it. 12:33:21 1 Read More: How to Convert Hours and Minutes to Minutes in Excel. Sometimes, it might show that the result returned is a. 12:33:14 1 This is where I got caught I didnt have the correct formatting applied to the cells. Read More: How to Convert Minutes to Hours and Minutes in Excel. But if on sunday he doesnt drive at all. Our goal is to convert minutes to hours and minutes in excel by combining the INT and QUOTIENT functions. is there an easy way to calculate if they have been on site from 7:30 am to 5:30 pm to get a full shift. It is like having an expert at my shoulder helping me, Your software really helps make my job easier. We bill by hours and tenths so I need a formula to convert the result to hours and tenths by set minute increments as follows: I hope my explanation is clear. Can you please help me translate these values into a time value? Download this workbook and practice while going through the article. Hi! The time between hours and minutes are converted as following screenshot shown: Note: If you want to keep the source unit in the cells and show results in the comment, you can check Add results as comment. for example if they work 9h45m - they would get 0.97 of a shift. Tips: Just replace the unit name in the formula, you can easily convert between these time measurements. If you follow the methods correctly, you should learn how to convert minutes to hours and minutes in the excel formula yourself. I am trying to convert 3.50 to show 3hours and 50 minutes in time format. See screenshot: 4. 7 Easy Ways to Calculate Hours and Minutes in Excel 1. Read More: Convert Time to Text in Excel (3 Effective Methods). Lets describe the steps of this method below. ). To convert hours to days, divide by 24. , Read More: How to Subtract and Display Negative Time in Excel (3 Methods). The Excel TIMEVALUE function has just one argument: Time_text is a text string in any of the time formats that Excel can recognize. document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); ExcelDemy is a place where you can learn Excel, and get solutions to your Excel & Excel VBA-related problems, Data Analysis with Excel, etc. Use HOUR, MINUTE, and SECOND Functions to Convert Time to Minutes, 5. Convert a time value to text with the TEXT function. Thanks for a terrific product that is worth every single cent! I couldn't find it. Read More: Convert Epoch Time to Date in Excel (2 Easy Methods). 21:35 Ideal for newsletters, proposals, and greetings addressed to your personal contacts. If I understand your task correctly, try the following custom time format: Hello, I am working as a logistics coordinator and i have 2 questions: 1) If i have a driver who finishes driving at 18:00(F7) and starts next day at 06:00(E8) it means he has 12hrs of rest time. In the second argument, the divisor requires the number by which you want to divide. Download Practice Workbook 5 Easy Methods to Convert Minutes to Hours and Minutes in Excel 1. Hello! 15h 30m 20s It means it takes a time value and returns only the hours value of that time. Apply TEXT Function 5. My favorite sports are Cricket (to watch and play) and Badminton (play). Input Data- 2 days 2 hours 2 minutes 2 seconds I think we're a lot closer to success, but I'm getting a #VALUE! Follow the ExcelDemy website for more articles like this. Let's try this with a practical example. Use the SUBSTITUTE function to replace the decimal separator in the number with ":". Apply Excel MOD Function to Calculate Time in Hours and Minutes, How to Apply Cubic Spline Interpolation in Excel (with Easy Steps), How to Add Text Prefix with Custom Format in Excel (4 Examples), How to Create Material Reconciliation Format in Excel, How to Use VLOOKUP Function with Exact Match in Excel, SUMIFS to SUM Values in Date Range in Excel, Formula for Number of Days Between Two Dates, At this time, you have got the working time of the employee for Monday. We get the result in the second format. 1440, to convert the data to minutes. Vraagje: Ik moet van 04:22 naar 00:04:22, welke formule kan ik gebruiken? thank you very much for explaining how to do this I have been tring to do this for quite a while. If negative it would return a blank. If this does not help, explain the problem in detail. Lastly, add all the values. Read More: Excel Convert Seconds to hh mm ss (7 Easy Ways). (Yes, those non-stop flights to/from Sydney to Dallas Fort Worth are killers! In general, there are two ways to convert time to decimal in Excel - by changing the cell format and by using arithmetic calculations or Excel time functions, such as HOUR, MINUTE and SECOND. Converting time in Excel - examples (.xlsx file). The relationship between time units is, Read More: How to Convert Hours to Minutes in Excel (3 Easy Ways). Multiple hours by 3600 and minutes by 60. Note:For conversions that involve a year, consider that a year is 365.25 days. No formulas and no calculations are required! You will find a variety of formulas to change time to hours, minutes or seconds as well as convert text to time and vice versa. To convert minutes in decimal format to a proper Excel time, divide by 1440. The format says General. Ex. I am Zehad Rian Jim. Another exampleConvert 16h 45m to hours only: 45m x 1h / 60m = 0.75h. Tips: Convert between hours and minutes, days: 2. I will use them to convert hours and minutes to minutes in Excel. This extracts the hour, minute, and second value from the D5 cells time and writes in the organized time value. Hey! i was struggling for an hour to Sum a lot of work hours on a spreadsheet, converting the AM/PM hours with INT() then doing SUM() worked great! I have tried to convert the 3.50 to the H:MM format is just gives me 12pm or 84:00. Now, we aim to apply the custom format to fulfill our goal. 12:33:07 2.15 If I need to have the clock in times and clock out times to be converted to decimal values that consist of 0-4 minutes = 0 , 4-9 =.1, minutes, can the formula be set up to do the conversions for me? In the Format Cells box, click Custom in the . Please help. Your email address will not be published. 12:33:36 2 Find all links in your document, get them verified, correct invalid ones and remove unnecessary entries with a click to keep your document neat and up to date. i'd appreciate any help! error will appear. We can easily convert this time format into hours. Dear Sir, I also need to be able to convert the hours in days if needed. Basically pivot is not capturing the time. The relationship between time units is, 1 Day = 24 Hours = 24*60 or 1440 Minutes Let's apply the method step by step. Simply changing the cell's format to TEXT won't work because this would change your time values to underlying numeric representation of the time. 12:33:10 2 Please try the following formula: Hi i want to calculate time worked on excel to be converted into hours worked. In different situations, we show time with the combination of these units. For example, if you write 2.5, it would represent 02-Jan-1900, 12:00 PM. I'll give an example: The data points should have looked like this 12:33:26 1 How do I go from 0800-1200 to 8:00am-12:00pm In One cell. Such as number and divisor. ExcelDemy.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program. This smart package will ease many routine operations and solve complex tedious tasks in your spreadsheets. We also showed ways to convert times in other formats hours and minutes as well. Select Text in the Category list on the "Number . : Convert Time to Minutes in Excel (5 Suitable Methods), 5 Methods to Convert Time to Minutes in Excel, 1. The result should be same format 00h 00min 03sec. Please visit Exceldemy for more useful articles like this. We can also use a convert function to get the number of hours from decimal time. If the end time is longer than the start time, then you need to add 1 day to their difference, Read this article for more details: How to calculate and display negative times in Excel. I graduated with a bachelor's degree in engineering from BUET. As we known, 1 hour = 60 minutes = 3600 seconds =1/24 day. If this is not what you wanted, please describe the problem in more detail. 23:32 I have 3 ppl working on different days and some days its zero so wanted to know which day they had come and which day they didnt. Where we have multiplied, we shall divide, and where we have divided, we shall multiple. The MOD function has two arguments mainly. I completed my study at East West University major in Telecommunications Engineering. The formula can be as simple as =A2/24. 8:00-16:00 - is that possible? =HOUR (A1) + MINUTE (A1)/60 + SECOND (A1)/3600. This subtracts the D5 and C5 cells time and returns only the hour value of the subtraction. 1d 05h 44m Here is a list of decimal number in cell B3:B5, in cell C3, type below formula to get the decimal time. That worked. In this section, I will show a simple way to do so. 12:33:46 1 document.getElementById( "ak_js_1" ).setAttribute( "value", ( new Date() ).getTime() ); Copyright 2003 2023 Office Data Apps sp. 12:34:01 1 Can you assist?? I also enjoy sports. I have an output of minutes that I'd like to convert to days, hours, and minutes using excel. We can see there are the start and end dates in our dataset. Hi! The number in the field is 1610. Combine HOUR and MINUTE Functions to Convert Hours and Minutes to Minutes, How to Apply Cubic Spline Interpolation in Excel (with Easy Steps), How to Add Text Prefix with Custom Format in Excel (4 Examples), How to Create Material Reconciliation Format in Excel, How to Use VLOOKUP Function with Exact Match in Excel, SUMIFS to SUM Values in Date Range in Excel, Formula for Number of Days Between Two Dates. How do you figure out how many minutes are in the one and a half day, or how many hours are in the five million seconds? Currently, I am working as a technical content writer at ExcelDemy. Open and create multiple documents in new tabs of the same window, rather than in new windows. And, the result will look like this. Is that a formula I can use to convert the number 1610 to return the number of day, hours and minutes? 19-24 = 0.4 If this does not help, explain the problem in detail. 12:33:15 1 I used TEXT function to convert the time column to a column of pure text that looks like it should, basically 1746 rows of values like this 18:01 Read More: Convert Military Time to Standard Time in Excel (2 Suitable Ways). Read More: How to Calculate the Duration of Time in Excel (7 Methods). Download 5 Useful Excel Templates for Free! 12:33:51 1 First of all, you have to change the format of. Hello! Besides, you can use the MOD function to calculate time in hours and minutes. We needed to apply a multiplication operation with the hour and minute values. For example, 8:30:00 AM will be converted to decimal 0.354166666666667. Is there any formula in Excel which it could directly convert day/hour/minute display into total minutes? In this case, we aim to convert minutes to hours and minutes in excel with this function. You can download our practice workbook form here for free. Maybe your hours are not marked with "hh" but with something else. The following tutorials explain how to perform other common operations in Excel: Excel: Calculate Difference Between Two Times in Hours 12:33:08 1.09 Is what I am asking possible. 3h 00m 12:34:22 1 T W 12:34:21 1 Use of CONVERT Function 3. For example, convert 167 minutes to 2:47. microsoft-excel; Share. 12:33:41 2 The formula doesnt work since it has been created based on the details you provided in your first query. To convert from decimal to hours : minutes : seconds format, use the divisor operator (/) together with the TEXTfunction. It is handy in case of negative time results and getting errors. Excel: Convert hours and minutes to minutes, http://www.proworkflow.com/blog/2009/02/converting-time-into-minutes-using-excel/, http://mathforum.org/library/drmath/view/63521.html, https://cybertext.wordpress.com/2012/04/27/excel-convert-seconds-to-minutes/, Word: Use the keyboard to add a word to the dictionary, Update on DeskCycle Ellipse usage: 2.5 years on, Word: Make all instances of a specific word a hyperlink to a URL, Word: Table or table row goes to next page, A light-hearted look at how punctuation can change meaning, Word: Change the gap between a footnote and the separator line, Word: Change caption numbering from sequential to chapter numbering, If one or more of my tips have helped you, saved you time, or saved your skin, you can thank me by clicking the PayPal button (or, Enter elapsed times in hours and minutes (using the format hh:mm) in Column B. To convert an Excel time to money based on an hourly rate, first convert the time to a decimal value. Tags: Calculate Time in ExcelHOUR FunctionIF FunctionMINUTE FunctionMOD FunctionNOW FunctionSECOND FunctionTEXT FunctionTIME Function. 21:59 12:33:05 2 Read More: Convert Decimal Coordinates to Degrees Minutes Seconds in Excel. I have the following in a spread sheet and am wondering how I go about setting up a formula to learn the difference between the cells. Hi! Hello! I feel like I've tried everything. 12:34:18 1 Can someone tell me how the conversion works? 12:33:31 2 Hi! 91 1 1 gold badge 1 1 silver badge 3 3 bronze badges. 25-30 = 0.5 =LEFT(A1,2)&":"&MID(A1,3,2)&"am-"&MID(A1,6,2)&":"&RIGHT(A1,2)&"pm". The TEXT Function is mainly used to convert a numeric value to a particular formula for many purposes. If you have any suggestions, ideas, or feedback, please feel free to comment below. I tested my steps again, adding 0:05 to the list of times. I earn a small commission if you buy any products using my affiliate links to Amazon. Thank you very much for the steps. To convert time to seconds, multiply the time time by 86400, which is the number of seconds in a day (24*60*60 ). I now would like to have following information: How many business hours does it take for a colleague to finish this job ? I current input hours formatted as text and then multiply by 24 but It gets thrown off if there is a whole number. 12:33:12 2 Such as value and format_text. Let's say you want to find out how many hours there are in 5.5 days, or how many days there are in 3.45 years, or how precisely how many months will pass between a beginning date and an ending date. You can use the following formula to convert a time duration to minutes in Excel: This particular formula converts the time duration in cell B2 to minutes. This checks if the hour difference of D5 and C5 cells time is positive. ExcelDemy.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program. Microsoft and the Office logos are trademarks or registered trademarks of Microsoft Corporation. For example, if the time is 10:14:22then the formula will convert this to 614.37 so that the time is represented as 614.37 minutes. Read More: How to Calculate Total Hours Worked in a Week in Excel (Top 5 Methods). If these values are written as time and a custom time format (e.g. If you can help, I'd hugely appreciate! Calculate the time difference and convert it to decimal number. You can use the TIME function to convert minutes to hours in Excel. In this case, our goal is to convert minutes to hours and minutes in excel in 5 ways. I highly recommend the Ablebits Ultimate Suite, Would recommend it to anyone who works with Excel, I have found the Ablebits app and website to be extremely useful, Ablebits Ultimate Suite is invaluable if you work with spreadsheets, Extremely useful add-in with extensive functionality, If that's not good service, I don't know what is. We can see time is successfully converted to minutes. In this article, I will show you how to convert hours and minutes to minutes in Excel. so I want excel to multiply 00h 00min 03sec with 500k 4:15 3.50. Cell D6 shows the same result formatted as time, which displays 1:00. ), Set the format for the cells in this new column to. Hello! Further on in this tutorial, you will find the detailed explanation of the first way and formula examples demonstrating the other technique. Combining QUOTIENT and INT Functions 4. Improve this question. 12:34:11 1 Convert text to time using the TIMEVALUE function. Instead of building formulas or performing intricate multi-step operations, start the add-in and have any text manipulation accomplished with a mouse click. 12:34:24 1 For these values, the formula works for me. And, the result will look like this. Then, to convert the decimal values into integer values select cell E5 and insert the formula: =INT (D5) Hit Enter. 12:34:16 1 Just one great product and a great company! Hi! The beginning of paragraph 2 explains it: 1440 is the number of minutes in 24 hours (60 x 24). It would concatenate the two previous results. how can be flexed becouse the time fromat that im tried to fixed it like this Incredible product, even better tech supportAbleBits totally delivers! Thanks so much! Convert Military Time to Minutes in Excel Using HOUR and MINUTE Functions, More Examples of Time to Minute Conversion in Excel, 1. In our article, we have used the subtraction functionality; in your requirements, you just need to utilize the addition functionality of Excel. Its really work, bu unfortunately once i have the value as ( 01h 22sc ) its dropped. A second is the fraction of a minute, which means if we convert seconds into minutes then decimal values will exist in minutes value. 1h 02m Up until now I have done that field manually Hello! Furthermore, press right-clicks on the selected cells, and the, If only you dont want to use any formula, then you can use the. Remembering that in the internal Excel system the date value is stored as a whole part and the time value as a fractional part of a decimal number, you can extract the date using the INT function, which rounds the cell value down to the nearest integer. Download 5 Useful Excel Templates for Free! Click Kutools > Content > Convert Time, then choose Time to Hours / Time to Minutes / Time to Seconds as you need, see screenshot: 3. Let us know if you have more ways to do the task. Hi! The TEXT function converts a value to text in a specific number format. Read More: How to Convert Time to Decimal in Excel (3 Quick Ways). Ultimate Suite is a treasure chest of useful tools, That one program has given me years of convenience, Ablebits is a dream come true for any Excel user, This add-in is really valuable for a very reasonable cost. 29 18:39:12. To apply this formula to the entire column: These sites helped me figure out what to do: Your email address will not be published. Click the Kutools > Content > Unit Conversion. Converting time to total seconds in Excel can be done in a similar fashion. Hold ALT button and press F11 on the keyboard to open a Microsoft Visual Basic for Application window. To convert time to minutes, multiply the time by 1440, which is the number of minutes in a day (24*60). We converted different formats of time into minutes. I got the right result. in the formula. Note: The other languages of the website are Google-translated. 12:34:52 2 Read More: How to Convert Seconds to Hours Minutes Seconds in Excel. Then, put the following formula on that cell. Read More: How to Convert Hours to Minutes in Excel (3 Easy Ways). Your email address will not be published. All rights reserved. See data example below. in order draw an average. Genius tips to help youunlock Excel's hidden features. Sorry, it's not quite clear what you are trying to achieve. Download and free trial Kutools for Excel Now ! 10 Day(s) 22 Hr(s) 34 Min(s) - I want to convert this in days only , like 10days 22 hrs should come as 11 days. How to convert DD:H:MM format in to Hours Then press Enter. Back to, =((HOUR(A2)*60)+MINUTE(A2)+(SECOND(A2)/60)), =HOUR(A2)*3600 + MINUTE(A2)*60 + SECOND(A2), Kutools for Excel Solves Most of Your Problems, and Increases Your Productivity by 80%, Convert Between Cells Content and Comments, Office Tab Brings Tabbed interface to Office, and Make Your Work Much Easier, This comment was minimized by the moderator on the site. I have just completed my B.Sc from Naval Architecture & Marine Engineering Department, BUET. I am Md. There are several ways to convert time units. You can also convert minutes to hours in Excel. We will use apply a simple subtraction and multiplication operation in this method. Look at the dataset. 12:34:46 2 Read More: How to Calculate Hours and Minutes for Payroll Excel (7 Easy Ways). Excel: Calculate Difference Between Two Times in Hours, Excel: Calculate Difference Between Two Times in Minutes, How to Use PRXMATCH Function in SAS (With Examples), SAS: How to Display Values in Percent Format, How to Use LSMEANS Statement in SAS (With Example). so using the delta between TIME A and TIME B: Using TEXT Function 2. this would save me days of work! In the Excel Ribbon, Clickon the Arrow Down near " Custom ". The date is stored as a number. Then concatenate those numbers with additional text using the CONCATENATE function or the & operator. Lets do it step by step. Now, we will convert the decimal time into minutes. Following, it would concatenate the hours, text. Regarding your query, just make a dataset table and use the SUM function or the addition functionality of Excel. So, we need to learn to convert minutes to hours and minutes in excel. Lets describe the method with easy steps below in order. An alternative way to write time in words in Excel is to apply the following custom time format to the cell: d "day," h "hours," m "minutes and" s "seconds". The formula is designed to work with time values, but it can also work with times written as text. Hour, minute, and second are the units of time. I am trying to count the presence of specific digits *within* a column of time values. I work on a 24 hour schedule and need to figure out to track my hours. Now, what if you need to convert time to hours and seconds too? Utilize Excel TEXT Function 5. 16h + 0.75h = 16.75h. At this point, we aim to change time to decimals. 12:34:26 2, I need to convert numbers to hours and mins Click OK to apply the formatting. If you want to further separate hours, minutes and seconds into individual columns, then use the HOUR, MINUTE and SECOND functions, as demonstrated in How to get hours, minutes and seconds from a timestamp. Thank you To convert hours and minutes to minutes, you have to multiply the hh:mm value by 1440 (which is 24 [number of hours in the day] multiplied by 60 [number of minutes in an hour]), AND make sure you set the formatting correctly for the both the hh:mm cells and the resulting minute cells. Hi! Note. I can compute it by hand of course, but who wants to do that? To view the number as a time: select the cell and, on the Home tabin the Number groupclick the arrow next to the Number Format box. 12:33:26 1 This section demonstrates 3 different formulas to convert hours from the standard time format (hh:mm:ss) to a decimal number. And the selected time cells have been converted into the desired hours, minutes or seconds you need, see screenshot: Tips: If you want the converted result located in another location, you can go the Convert Time dialog by clicking Kutools > Content > Convert Time, in the Convert Time dialog box, choose the convert type you need, and then check Save to another location checkbox, and click a cell where you want to put the result, see screenshot: How to convert between kb and mb, gb, tb and vice versa? You will find 2 simple methods here to do so. Decimal time is commonly used in excel to track the record of a persons time spent on a project. A duration of 13 hours, 30 minutes, and 0 seconds is converted to 810 minutes. QUOTIENT(B5,60): This portion takes the values in decimals and converts them into hours and minutes. Good evening, Hi! Excel: How to Calculate Average Time, Your email address will not be published. The information you provided is not enough to understand your case and give you any advice, sorry. This is the easiest option to change minutes in an excel sheet. Extract the time from the text using the LEFT and RIGHT functions and convert it to time using TIMEVALUE function, as described in the article above. could I possibly get some pointers on the below: i usually download a report with a time in and time out for our engineers on site. Here, we want to show how to convert decimal time to the hour and minute in Excel. Hi! And I'm sorry if you've already directly answered this question. IF(LEN(MOD(B5,60))=1,0,)&MOD(B5,60): In the first portion, it represents the decimal values and converts the values into days. You can also use the TEXT function to calculate time in hours and minutes. 2:34 should output 2.6; 1Hr 5 minutes = 1.1; 2 Hrs 15 minutes = 2.3; 3 hrs 45 minutes = 3.8

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how to convert hours to minutes in excel

how to convert hours to minutes in excel