Use an online tool, such as our calculator, where you can add or subtract hours, just choose what you want to do and enter the times, the calculator will show you the result as soon as you enter the respective times.

In Excel you can use the SUM function or simply use =A1+A2 (Values present in column A, lines 1 and 2), but be careful, the fields with the time values need to be formatted correctly, for example, in HH:MM (Hour and Minutes).

To decrease you can also use the direct calculation of Cell X - Cell Y.

Yes, but you will need to convert the time to decimal, which makes the calculation complex, for example, to add 01:34:00 (One hour and thirty-four minutes) plus 00:37:00 (Thirty-seven minutes) you need to convert the minutes to decimals:

34 / 60 = 0.56

37 / 60 = 0.61

0.56 + 0.61 = 1.17

As the result was above 0.99, that is, it returned 1, it indicates that you have one hour, so you already know that the total time will be two hours and a few minutes, let's now know the minutes:

0.17 * 60 = 10.2

So we have a result of 02:10:00 (Two hours and ten minutes), but see that the result is wrong, after all the correct result is 02:11:00, this is due to the fractions in the conversion of minutes to decimals .

So we conclude that performing the calculation of hours on the conventional calculator, in addition to being complex, is not necessary.

To convert minutes into decimals, divide the number of minutes by 60. For example:

00:47:00 (Forty-seven minutes): 47/60 = 0.78, so 47 minutes in decimals corresponds to 0.78 decimals and/or hundredths.

If you want to convert hours and minutes into decimals, use our tool convert minutes to decimals.