Duration Calculator
Parse 1h30m, 2:30:00 and similar duration notations, sum multiple spans and break them into hours / minutes / seconds.
How to use Duration Calculator
- Enter one per line in the Duration box (e.g. 1h30m, 45m, 2:30:00)
- Click Sum to get the total; click Split to break one down
- Copy the result
Features
- Everything runs in your browser - pasted content never leaves your device
- No sign-up or login; open the page and use it, equally handy on mobile
- All processing is UTF-8 byte based, so Chinese text stays clean
FAQ
- Is this tool free?
- Completely free, no sign-up or login, unlimited uses.
- Will my data be uploaded?
- No. All computation runs locally in your browser; your input never leaves your device.
- How do I use it?
- Fill in the box above, click the matching button to get the result, then click Copy to take it away.
- What notations are supported?
- Supports 1h30m, 45m, 90s as well as 2:30:00, 1:30 (hh:mm:ss / mm:ss) forms.