How to use the time calculator
This time calculator adds or subtracts two time durations (hours and minutes) and shows the result as HH:MM plus total minutes and decimal hours. Enter Time 1 (hours and minutes), choose Add or Subtract, enter Time 2, then click "Calculate." For subtraction, if Time 2 is greater than Time 1, the result is 0:00 (no negative time). Minute overflow is handled automatically (e.g., 90 minutes becomes 1 hour 30 minutes).
Adding or subtracting time is useful for time tracking, scheduling, and planning. You might need to sum how long you worked across two segments (e.g., 2:30 + 3:45 = 6:15), find the difference between two durations, or total meeting or travel times. The result is shown in both a readable HH:MM form and as total minutes and decimal hours, so you can use it for display or for further calculations (e.g., multiplying by an hourly rate).
The calculator runs entirely in your browser. There is no sign-up, no download, and no delay. It is designed to be mobile-friendly: the two-column layout stacks on small screens, and the time inputs are easy to use. Enter hours as whole numbers (0 or more) and minutes from 0 to 59. Use it for quick time arithmetic or for checking totals when tracking hours.
Bookmark this page for quick access whenever you need to add or subtract time. This free time calculator provides fast, clear results on any device.