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Time Calculator

Add, subtract, multiply, and divide time units.

Everyday
Time Calculator
Add or subtract hours and minutes from a time.

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Simple Time Arithmetic

This Time Calculator simplifies arithmetic operations with time values. You can easily add or subtract a duration (in hours and minutes) from a given start time to find the resulting time. It's ideal for calculating travel times, work shifts, or any scenario involving time durations.

The Calculation Explained

The calculator converts the start time and the duration into total minutes, performs the addition or subtraction, and then converts the result back into a standard HH:MM time format, correctly handling rollovers past midnight or into the previous day.

How to Use the Calculator

  1. Start Time: Enter the initial time in HH:MM format.
  2. Operation: Choose to 'Add' or 'Subtract' a duration.
  3. Duration: Enter the number of hours and minutes for the duration.
  4. Calculate: The calculator will display the final time.

Real-World Example

Your flight departs at 10:30 PM, and the flight duration is 5 hours and 45 minutes. You want to know what time it will be at your destination (assuming the same time zone).

  • Start Time: 22:30
  • Operation: Add
  • Duration: 5 hours, 45 minutes
  • The calculator will show the result: 04:15 (the next day).

Frequently Asked Questions (FAQ)

  • Does this calculator handle AM/PM? The calculator uses a 24-hour format (military time) for its calculations to avoid ambiguity, but the input and output can be in standard 12-hour format depending on your system settings.
  • What if I subtract a long duration that goes back more than one day? The calculator will show the correct time of day, but it does not specify how many days in the past the result is. It focuses on the time on the clock.
  • Can I calculate the duration between two times? This tool is for adding/subtracting a duration. To find the duration between two times, please use our Time Duration Calculator.