Time Calculator
Add and subtract amounts of time in hours and minutes. Enter each time, choose whether to add or subtract it, and see the total in hours and minutes, in decimal hours, and in minutes.
Total time
3 h 25 min
Check the highlighted fields to see your result.
- Decimal hours
- 3.42
- Total minutes
- 205
Results are estimates for information only and do not constitute financial, medical, or legal advice.
How the calculation works
Adding times is easier in minutes. The calculator turns each time into minutes (hours × 60 + minutes), adds or subtracts them, and then turns the total back into hours and minutes.
The formulas
Minutes = hours × 60 + minutes
Hours = total minutes ÷ 60 (the remainder is minutes)
Worked example
Add 2 h 30 min and 1 h 45 min, then subtract 50 min.
- In minutes: 2 × 60 + 30 = 150; 1 × 60 + 45 = 105; and 50.
- Total: 150 + 105 − 50 = 205 minutes.
- Back to hours: 205 ÷ 60 = 3 with 25 left over, so 3 h 25 min, or 3.42 decimal hours.
Frequently asked questions
How do I convert hours and minutes to decimal hours?
Divide the minutes by 60 and add them to the hours. For example, 3 hours and 25 minutes is 3 + 25 ÷ 60 = 3.42 hours (rounded). Timesheets and payroll often use decimal hours.
Can I enter more than 59 minutes?
Yes. The calculator converts extra minutes into hours, so 0 hours and 90 minutes counts as 1 hour and 30 minutes.
Can the total be more than 24 hours or negative?
Yes. The calculator adds up durations, not times of day, so the total can be 30 hours or more. If you subtract more than you add, the result is negative.