Hours Calculator
Add hours, compare times, and convert between time formats.
Use the mode selector to switch between common hour calculations.
Result
--
Run the calculation to see the result.
| Metric | Value |
|---|---|
| Total hours | -- |
| Total minutes | -- |
| Decimal hours | -- |
| Extra detail | -- |
Quick Answer
Use the mode selector to add durations, compare clock times, convert to decimal hours, or add hours from the current time.
How to Calculate
- Choose the mode.
- Enter the relevant hour values or times.
- Click Calculate.
- Read the computed hours and minutes.
Formula
Add / subtract = duration A +/- duration B
Between times = end clock time - start clock time
Decimal = hours + minutes / 60
Worked Examples
Example 1: 2h 15m + 1h 45m = 4h 0m.
Example 2: 09:00 to 17:30 = 8h 30m.
Example 3: 1.5 decimal hours = 1h 30m.
How to Interpret Your Results
| Output | Meaning | Action |
|---|---|---|
| Total hours | Elapsed or combined hours. | Use it for quick scheduling. |
| Decimal hours | Duration in decimal form. | Use it for invoices and timesheets. |
| Extra detail | Mode-specific supporting value. | Check it when validating the calculation. |
Frequently Asked Questions
Yes. In add/subtract mode, enter the second duration and the calculator will combine it with the first.
Yes. The between-times mode treats an earlier end time as overnight.
Yes. The decimal-hour mode is useful when you need hours in decimal form for billing or payroll.
Related Calculators
References
- OmniCalculator reference page
- The page combines several common hour calculations in one tool.
- Last reviewed: March 2026.