Hours and Time Calculator
Add or subtract hours and minutes. Calculate total time worked across multiple time periods.
⏰ Everyday📐 Total Time = Sum of all time periods
Time 1 hours
Time 1 minutes
Time 2 hours
Time 2 minutes
Time 3 hours (optional)
Time 3 minutes
Please enter valid values.
Formula & Reference
| Variable | Formula | Units |
|---|---|---|
| Hours and Time Calculator | Total Time = Sum of all time periods | hours:minutes |
Step-by-Step Examples
Example 1
Two Work Shifts
8h30m + 7h45m.
- Total minutes: 510+465 = 975
- = 16h 15m
✓ 16h 15m
Example 2
Overtime Week
8h + 9h + 8.5h = 8+9+8h30m.
- Total: 25h30m this example
- Overtime if >40hrs/week
✓ 25h 30m
Example 3
Project Time
3h45m + 2h20m + 1h15m.
- Total: 7h20m
- = 7.33 decimal hours
✓ 7h 20m
Real-World Applications
Hourly Workers
Calculate total hours worked across shifts.
Freelancers
Add up billable time for invoicing.
Project Trackers
Total time spent on tasks.
Students
Track study hours across subjects.
Common Mistakes to Avoid
⚠️
Not converting minutes properly
90 minutes = 1 hour 30 minutes, not 1.90 hours. Use decimal: 1.5 hours.
⚠️
Forgetting unpaid breaks
Subtract unpaid break time separately. This calculator adds all entered times together.
Frequently Asked Questions
How to add hours and minutes? ▾
Convert all to minutes, add, then convert back. 2h30m + 1h45m = 150+105 = 255 min = 4h15m.
Decimal hours? ▾
Divide minutes by 60. 7h20m = 7 + 20/60 = 7.333 decimal hours. Used for payroll and billing.
How many hours in a work week? ▾
Standard: 40 hours (8hrs/day × 5 days). Part-time varies. ACA defines full-time as 30+ hours/week.