Suray

Time Calculator

Add, subtract, and convert between hours, minutes, and seconds.

Сурталчилгааны орон зай | Ad Space
Time 1
Hours
Minutes
Seconds
+
Time 2
Hours
Minutes
Seconds
Result
02:15:00
8,100 Seconds · 135 Minutes · 2.25 Hours

Time calculations are based on the 24-hour format.

How to use

  1. 1

    Choose 'Add / Subtract' to combine two durations, or 'Convert' to change units.

  2. 2

    Enter the hours, minutes, and seconds in the input fields.

  3. 3

    Select the operation (Add or Subtract) if you are calculating a total.

  4. 4

    The result shows the total time broken down into hours, minutes and seconds.

  5. 5

    Use 'Convert' to see exactly how many seconds are in a specific number of hours.

Formula

Time math uses a Base-60 system. For addition: and .

Frequently asked questions

How do I add up my work hours?
Enter the hours and minutes for each task/shift using the 'Add' mode. Our tool will automatically carry over minutes into hours once they exceed 60.
What is the 24-hour format?
The 24-hour clock (military time) removes the need for AM/PM by counting from 00:00 to 23:59. This calculator works with durations (how long) rather than specific timestamps (what time).