Time Calculator

What is time calculator?

A time calculator adds or subtracts two durations — each expressed in hours and minutes — and gives you the total in both decimal hours and total minutes. This is the tool you need for timesheets, workout logs, cooking timers, music playlists, and any scenario where you are combining chunks of time. Enter the first duration (e.g. 3 hours 45 minutes) and the second (e.g. 2 hours 30 minutes), and the calculator normalizes everything to minutes, sums them, and converts back to decimal hours. It handles negative values too — useful for subtracting a break from a work shift or finding the gap between two timed events. The conversion between hours and minutes is exact (1 hour = 60 minutes), so there is no rounding error. All calculations are private and run in your browser.

How to use this calculator

1. Enter your first duration - hours.
2. Enter your first duration - minutes.
3. Enter your second duration - hours.
4. Enter your second duration - minutes.
5. Click the "Calculate" button.
6. View your result instantly — the main result is displayed prominently at the top with a detailed breakdown below it.

When to use this calculator

• Adding up work hours for timesheets and payroll
• Calculating total workout or practice time across multiple sessions
• Combining cooking prep and cook times for meal planning
• Subtracting break time from a shift to get net work hours
• Adding music track durations to plan a playlist or set list