devLocal developer utility
Duration Calculator
Calculate elapsed time between two dates in your browser. Your input stays in your browser while you work.
Duration Calculator🔒 Processed locally
How to use Duration Calculator
Complete the labeled fields above, choose an action, and inspect the result before copying or downloading it.
Processing runs locally in this browser. No input is uploaded or sent to a conversion service.
Both times use your device’s timezone.
Inputs
- Start date and time
- End date and time
Related tools
- ISO Week Number — Find the ISO week number and ISO week year for a date.
- Working Day Calculator — Count weekdays inclusively, excluding optional holiday dates.
- Unix Timestamp Converter — Convert Unix seconds or milliseconds to dates and dates to timestamps.
- Timezone Converter — Convert a local date/time between IANA time zones in your browser.