Time Calculator
Add or subtract time durations. Calculate elapsed time between events or total d...Add or subtract time durations. Calculate elapsed time between events or total duration of multiple activities. Free, instant results.
Updated
Quick Examples
Calculator Features
Why Use Time Calculator?
Add & Subtract
Easily add or subtract time durations with support for days, hours, minutes, and seconds.
Auto Conversion
Automatically converts units (90 minutes becomes 1 hour 30 minutes).
Multiple Units
See results in days, hours, minutes, and seconds simultaneously.
Instant Results
Results update in real-time as you type. No buttons to click.
Copy Results
One-click copy to clipboard for easy sharing.
100% Private
All calculations happen in your browser. No data sent to servers.
Common Uses
Project Tracking
Add up time spent on different tasks to calculate total hours.
Workout Planning
Calculate total workout duration including rest periods.
Travel Planning
Add flight times, layovers, and commute for total travel time.
Recipe Timing
Calculate total cooking time for multi-step recipes.
How It Works
Enter First Time
Input the first time duration using days, hours, minutes, and/or seconds fields.
Select Operation
Choose Add to combine durations or Subtract to find the difference.
Enter Second Time
Input the second time duration. Use the swap button to reverse the times.
View Results
See the result in multiple formats: combined breakdown and total conversions.
Time Tips
Time Tracking Tip
For work time tracking, enter each task separately and add them together to get accurate totals for billing or reporting.
Unit Conversion
The calculator shows totals in all units. Need just hours? Check the 'Total Hours' field for decimal hours perfect for timesheets.
Negative Results
A negative result means the second time was larger than the first. This is useful for seeing how much time you're over or under.