Date and Time Duration Calculator
Calculate the exact duration between two dates and times in years, months, weeks, days and smaller units.
Date & Time Duration Calculator
Use this duration calculator to easily calculate how many years, months, weeks, days, hours, minutes, or seconds are between any two dates. Supports precise calculation down to seconds. Perfect for daily, work, or project management needs.
ABOUT THIS TOOL
Date and Time Duration Calculator
Measure elapsed time between two local dates and times in total seconds, minutes, hours, days and approximate calendar components.
How to use this tool
- Enter the start date and time.
- Enter the end date and time.
- Calculate and copy the duration in the format you need.
Examples
- Measure a project window from Monday 09:00 to Friday 17:00.
- Convert a timed event into total minutes.
Frequently asked questions
Does daylight saving time affect the result?
The calculation uses the browser local time zone, so daylight-saving transitions can affect elapsed time.