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Calculate Work Hours Worked
Add up your hours across the day to log time spent on tasks or to invoice clients.
No login required
Formats: HH:MM:SS (e.g. 01:30:45) or HH:MM (e.g. 02:15)
Result
02:15:30
2h 15m 30s · 8130 seconds total
135.50
minutes
2.258
hours
8,130
seconds
Work Hours tips
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For freelance time tracking, add up multiple session durations from a project to invoice exactly.
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For weekly time logs, sum each day's totals into a weekly grand total.
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Use "Time between" mode to calculate hours from clock-in to clock-out.
How It Works
1
Enter
Enter your data into the tool above. Everything stays local to your browser.
2
Process
The tool processes your data instantly in your browser using JavaScript. No server, no waiting.
3
Download
Get your result instantly. Nothing is stored after you leave the page — complete privacy.
Why use ours?
✓Completely free — no hidden costs, ever
✓No account, email, or login required
✓Files never leave your device
✓No file size limits whatsoever
✓No watermarks on any output