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.
Tool
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
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.
Can it calculate overnight durations?
Yes. Durations can pass midnight and continue into the next day or later dates.
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.
Can I use this as a time difference calculator?
Yes. Time difference calculations are covered by this duration calculator.