About the Time Calculator
This tool adds and subtracts two times given in hours and minutes. It converts each input to total minutes, performs the operation, and displays the result in a readable format like 3h 15m. Negative differences are supported (e.g., -1h 20m).
Key features
- Addition and subtraction of times
- Handles negative differences
- Clear, readable output format (Hh Mm)
How to use
- Enter hours and minutes for Time A and Time B.
- Click Submit to compute.
- View A + B and A − B results.
Formula
Convert to minutes: total = hours × 60 + minutes
Add/Subtract: sum = totalA + totalB; diff = totalA − totalB
Convert back: hours = ⌊|total|/60⌋; minutes = |total| mod 60; prefix with − if total < 0
Variables
| Symbol | Meaning |
|---|---|
| Time A | The first time value (hours and minutes) |
| Time B | The second time value (hours and minutes) |