Hours Calculator
Starting Time
Time to Add
Result
0h 0m
= 0.00 decimal hours
Why Decimal Hours?
Many payroll and billing systems use decimal hours instead of hours:minutes format.Decimal hours make calculations easier: 8.5 hours x $20/hour = $170. Converting minutes to decimals: divide minutes by 60 (30 min / 60 = 0.5 hours).
Sources & Methodology
Total Hours = Sum of all time entriesTime addition for timesheets
How to Use the Hours Calculator
Our free hours calculator helps you add and subtract time, track work hours, calculate time differences between clock times, and convert hours and minutes to decimal format for payroll and timesheets.
Calculator Modes
- Add/Subtract Time: Add or subtract hours and minutes to any time value
- Time Difference: Calculate hours and minutes between two clock times (e.g., 9:00 AM to 5:30 PM)
- Hours to Decimal: Convert hours and minutes to decimal hours (e.g., 2h 30m = 2.5 hours)
- Work Hours Tracker: Log multiple time entries and get total hours worked
Hours to Decimal Conversion
Many payroll systems require time in decimal format. To convert manually: divide minutes by 60 and add to hours. Our calculator does this instantly:
- 15 minutes = 0.25 hours
- 30 minutes = 0.5 hours
- 45 minutes = 0.75 hours
- 8 hours 45 minutes = 8.75 decimal hours
Common Use Cases
- Calculating total work hours for timesheets and payroll
- Tracking project time for billing clients
- Planning schedules and time management
- Converting time for international business across time zones
Tips for Accuracy
- Double-check AM/PM when entering clock times
- Remember that overnight shifts cross midnight
- For payroll, always round to your company's preferred increment (usually 15 minutes)
Related Time & Finance Calculators
Calculate dates between events with our date calculator. Need to calculate pay? Use our salary calculator to convert hourly to annual wages, or our paycheck calculator to estimate take-home pay.
Frequently Asked Questions
Divide the minutes by 60 and add to the hours. For example, 2 hours 30 minutes = 2 + 30/60 = 2.5 decimal hours. This is commonly used for timesheets and billing.
Enter your start and end time for each day using the Work Tracker mode, and the calculator totals all entries. It accounts for overnight shifts that cross midnight automatically.
Elapsed time shows duration in hours and minutes (e.g., 7h 45m). Decimal hours convert that to a single number (e.g., 7.75) which is easier for payroll and invoicing calculations.
Yes. Use the Add/Subtract mode to combine multiple time entries or subtract one duration from another. The calculator handles carry-over between minutes and hours automatically.
Overtime typically starts after 40 hours per week or 8 hours per day depending on state law. Use the Work Tracker mode to log daily hours, and the weekly total will show if you have exceeded the overtime threshold.
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