Time Calculator
Add, subtract, and calculate differences between time values.
How the Time Calculator Works
The Time Calculator lets you add multiple time values together or find the difference between two times. Enter hours, minutes, and seconds for each time value, and the calculator handles all the carry-over arithmetic automatically.
Results are displayed in both standard HH:MM:SS format and decimal hours format. Decimal hours are useful for timesheets and billing — for example, 1 hour and 30 minutes equals 1.50 decimal hours.