Hours & shifts
Hours & Minutes Calculator
Add or subtract multiple durations in hours and minutes. Get a signed total in exact minutes and decimal hours. Free for U.S. workers.
Know the numbers
How to use this calculator
Enter durations, not clock times. Use a separate row for each duration and choose addition or subtraction. Remaining minutes must be from 0 to 59.
A worked example
7 hours 45 minutes + 8 hours 20 minutes − 30 minutes = 15 hours 35 minutes, or 15.58 decimal hours.
The calculation
Signed total = sum of each row's sign × (hours × 60 + minutes).
Before you use the result
A negative result is a duration difference, not a negative clock time. The calculator does not infer dates, AM/PM, or shift boundaries.
Common scenarios
Use this calculator to total your hours across multiple shifts, add up paid and unpaid time, or find the difference between two durations. If you worked 7 hours 45 minutes on Monday and 8 hours 20 minutes on Tuesday, add them to get 16 hours 5 minutes. If you need to subtract a 30-minute break from a total, enter it as a subtraction. The result shows both hours and minutes and decimal hours for payroll entry.
Calculation methodology: View formulas, limits, and corrections
Common questions about Hours & Minutes Calculator
How do I add multiple shifts together?
Enter each shift as a separate row using addition. The calculator sums all rows and shows the total in both hours and minutes and decimal hours.
Can I subtract break time from a total?
Yes. Add your total hours as a positive row, then add the break as a subtraction row. The result will show your net paid time.