Date & Time

Duration Calculator

Calculate duration between two dates and times directly in your browser. Get the difference in days, hours, minutes, seconds, and readable time units.

Duration Calculator

Calculate duration between two dates and times directly in your browser. Get the difference in days, hours, minutes, seconds, and readable time units.

This tool runs in your browser. Your input is processed locally and is not uploaded.

About this Tool

Use this free duration calculator to find the exact time between two dates and times. It is useful for work logs, event lengths, travel time, project timing, and elapsed time calculations.

Conversion Formula

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Duration is calculated by converting both date and time values to comparable instants, subtracting the start from the end, and formatting the result as days, hours, minutes, and seconds.

Examples

2026-01-01 09:00 to 2026-01-01 17:30 = 8 hours 30 minutes
2026-06-01 22:00 to 2026-06-02 01:15 = 3 hours 15 minutes
Calculate the duration of an event from start date and end date

Frequently Asked Questions

What is a duration calculator?

A duration calculator finds the amount of elapsed time between two dates and times.

FAQ

Can it calculate overnight durations?

Yes. Durations can pass midnight and continue into the next day or later dates.

FAQ

Is this different from a date difference calculator?

Yes. A date difference calculator focuses on dates, while a duration calculator includes exact times of day.

FAQ

Can I use this as a time difference calculator?

Yes. Time difference calculations are covered by this duration calculator.

FAQ

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