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How to convert time to decimal hours/minutes/seconds in Excel?

Author: Sun Last Modified: 2024-07-17

Converting time to decimal hours, minutes, or seconds in Excel is a common task, especially when dealing with time-based data analysis. Suppose you have a range of time or texts with [HH:MM:SS] format in Excel, and now you want to convert them to decimal hours, minutes or seconds as following screenshot shown. This article provides a detailed guide on how to perform these conversions and offers optimization tips for efficient data handling.

arrow blue right bubble Convert time to decimal hours/minutes/seconds with formulas

In Excel, you can use some formulas to convert [hh:mm:ss] to decimal hours, minutes or seconds.

1. Select a cell and type the formula =A1*24 into it and press Enter to get the result out, if you need, drag fill handle over range to apply the formula.

convert time to hours 1

2. Right click at the selected range and click Format Cells from context menu. And in the popping dialog, select Number from the Category list, and specify the decimal places you need. See screenshots:

convert time to hours 2
convert time to hours 3

3. Click OK. Now each time has been converted to decimal hour at once.

doc convert time 5


1. You also can use this formula to convert time to hours =HOUR(A1)+MINUTE(A1)/60+SECOND(A1)/3600.

2. If you want to convert time to decimal minutes, use this =A1*24*60 or =HOUR(A1) * 60 + MINUTE(A1) + SECOND(A1) / 60.

3. If you want to convert time to decimal seconds, use this =A1*24*60*60 or =HOUR(A1) * 3600 + MINUTE(A1) * 60 + SECOND(A1).

arrow blue right bubble Convert time to decimal hours/minutes/seconds with Kutools for Excel

Unlock the full potential of your time data with the Convert Time feature of Kutools for Excel! Say goodbye to complex formulas and tedious manual calculations. With just a few clicks, you can transform hours, minutes, and seconds into decimal format, making your data analysis faster and more accurate.

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After installing Kutools for Excel, please do as below:

Select the time range you want to convert to decimal numbers, click Kutools > Content > Convert Time, and select one option you need from the context menu. See screenshots:

doc convert time 7

After selecting the converting option, a dialog popped out to remind you how many cells have been converted. Click OK to close it.

doc convert time 7

Now you can see every time is converted.

doc convert time 8


If you want to convert time to decimal numbers and save the result in another location, you can do as these steps:

1. Select the data range and click Kutools > Content > Convert Time > Convert Time. See screenshot:
doc kutools convert time 2

2. In the popped out dialog, check the converting option you need in Convert Type section and check Save to another location(Convert range is one area) checkbox, then click to select a range to put out the result, and click OK > Ok > OK to close dialogs. See screenshots:

doc convert time 3
doc convert time 11

Now the data is converted and saved in another location.

doc convert time 12

Whether you prefer using formulas or the streamlined approach of Kutools for Excel, converting time to decimal format in Excel is straightforward and efficient. Formulas offer a flexible method for those familiar with Excel's functions, while Kutools for Excel provides a quick, user-friendly solution for instant results. Choose the method that best fits your workflow and enhance your time data management today. If you're interested in exploring more Excel tips and tricks, our website offers thousands of tutorials.

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