About the Time Calculator
Add up durations — lap times, video clips, timesheets — in hours, minutes and seconds. Start a line with a minus sign to subtract it.
Time Calculator
Add and subtract hours, minutes and seconds, and convert the total to decimal hours.
- Enter your numbers
- Results update as you type
- Copy the answer or share the link
Runs in your browser. Your data and files never leave your device.
Frequently asked questions
How do I convert 1:45 to decimal hours?
Divide the minutes by 60: 1 hour 45 minutes = 1.75 hours. The result panel shows this for your total.
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