Time calculator

How to use the tool

Compare the sum of positive durations with the sum of deductions. The buttons add a row of plus or minus 15 minutes.

1. Fill in these fields: Durations · H:MM, one per line.
2. Select “Calculate” to obtain the result.
3. Enter one H:MM duration per line, using a minus sign to subtract.
4. Up to 200 lines are supported.

Method, examples and limits

2:30 + 1:45 − 0:15 = 4:00, or 240 minutes and 4 decimal hours. Hours may exceed 24 because these are durations rather than clock times. Minutes must range from 00 to 59. Calculations use whole minutes and retain the sign of negative totals.

Result details

Limits and checks

• Yes. Enter a negative line, such as -0:15 to subtract fifteen minutes.