Time Calculator
Please enter valid time values.
What Is a Time Calculator?
A time calculator adds or subtracts two time durations (given in hours, minutes, and seconds) and returns the correctly formatted result, automatically carrying over units as needed — 60 seconds becomes 1 minute, 60 minutes becomes 1 hour.
How to Use This Calculator
Enter the first time duration, choose to add or subtract, enter the second time duration, then click "Calculate" for the combined result.
Common Uses
This is useful for adding up work hours, calculating total exercise or cooking time, tracking video/audio editing durations, or figuring out how much time remains before a deadline.
Frequently Asked Questions
What happens if subtraction results in a negative time?
If the second time is larger than the first in a subtraction, the result will show as negative to indicate the second duration exceeds the first.
Can I enter more than 59 minutes or seconds?
Yes, you can enter any value — the calculator automatically converts and carries over excess minutes/seconds into hours/minutes in the final result.
Is this the same as calculating time between two clock times (like 9:00 AM to 5:00 PM)?
No, this calculator adds/subtracts durations, not clock times. For clock-time differences, treat the start time as duration from midnight.
Can I use decimals for minutes or seconds?
It's best to use whole numbers for accurate carry-over calculations between hours, minutes, and seconds.