Time Calculator

Add or subtract time in hours and minutes. Calculate time duration between periods.

Convert to minutes: Total = Hours x 60 + Minutes; Perform operation; Convert back: Hours = Minutes / 60, Remainder = Minutes
Add: 2h 30m + 1h 45m = 4h 15m (255 min); Subtract: 8h 30m - 2h 45m = 5h 45m (345 min)

How do you add hours and minutes?

Convert to total minutes, add, then convert back. Example: 2h 30m + 1h 45m = (2x60+30) + (1x60+45) = 150 + 105 = 255 minutes = 4h 15m. When minutes ≥ 60, carry over to hours: 75 minutes = 1h 15m. This calculator does the math automatically. Use for: Work hours, project time, cooking time, travel duration, time tracking.

How do you subtract time?

Convert to minutes, subtract, convert back. Example: 8h 30m - 2h 45m = 510 - 165 = 345 minutes = 5h 45m. If result is negative, time borrowed more than started. Example: 1h 15m - 2h 30m = 75 - 150 = -75 minutes = -1h 15m (you went 1h 15m over). Useful for: Remaining time, overtime calculation, elapsed time between events.

How many hours are in different time periods?

Time conversions: 1 hour = 60 minutes, 1 day = 24 hours = 1,440 minutes, 1 week = 168 hours, 1 month (average) = 730 hours, 1 year = 8,760 hours. Work year: 2,080 hours (40 hrs/week x 52 weeks). Common durations: Full-time job = 40 hrs/week, Part-time = 20-30 hrs/week, Overtime = 40+ hrs/week. Calculator handles hours and minutes for precision.

How do I calculate total hours worked for payroll?

Track daily hours, add them up. Example: Mon 8h 30m, Tue 7h 45m, Wed 9h 15m, Thu 8h 0m, Fri 6h 30m. Convert each to minutes: 510 + 465 + 555 + 480 + 390 = 2,400 minutes = 40 hours. Or convert to decimal hours (8.5, 7.75, 9.25, 8.0, 6.5 = 40.0 hrs). Payroll often uses decimal hours: 8h 30m = 8.5 hours for calculation.