Time Calculator

A time calculator helps you add or subtract durations expressed in hours, minutes and seconds.

It is useful for calculating work hours, study sessions, travel durations, exercise periods, project schedules and other activities involving time.

Fashnza's Time Calculator also includes a simple time conversion tool for converting between seconds, minutes, hours and days.

For accurate calculations, the calculator first converts every entered duration into seconds.

Total Seconds = (Hours × 3,600) + (Minutes × 60) + Seconds

After adding or subtracting the durations, the resulting number of seconds is converted back into hours, minutes and seconds.

This calculator works with elapsed time durations. It does not calculate time zones, daylight-saving changes or calendar dates.

When subtracting a larger duration from a smaller duration, the calculator displays the result as a negative duration.

What can I calculate with this tool?

You can add or subtract two time durations using hours, minutes and seconds.

Can I calculate work hours?

Yes. You can enter work durations or other elapsed time periods to calculate their total.

Can I subtract time?

Yes. Select the Subtract option to find the difference between two durations.

Can I convert hours into minutes?

Yes. Use the Time Converter section to convert between seconds, minutes, hours and days.

Is the Time Calculator free?

Yes. Fashnza's Time Calculator is free to use.

Does Fashnza store my time calculations?

No account is required. Calculations are performed directly in your browser.