What this calculator does
The time duration calculator on CalcPilot turns a common time & date question into an instant answer — no spreadsheets, no sign-up, and no hidden assumptions.
Duration between two times of day.
How to use the Time Duration Calculator
- Enter your values in the fields on the left.
- Results update automatically.
- Use action buttons to copy, share or print.
The formula
diff = end − start in minutes; add 24h if negative.
Worked example
09:00 to 17:30 = 8h 30m.
Common mistakes
- AM/PM confusion
- Cross-midnight
- Not padding with zeros
When to use it
Use for work hours, cooking, workouts.
Pro tips for the Time Duration Calculator
- Save your favorite scenarios by clicking the star icon — they're stored locally, no account needed.
- For big decisions, run best-case, expected, and worst-case scenarios and compare the breakdowns side by side.
- Copy the result to paste it directly into email, Notion, or a spreadsheet cell.
Frequently asked questions
›24-hour format?
Yes — use HH:MM.
›Cross-midnight?
Handled — adds 24h if negative.
›Seconds?
Not supported here.
›Multiple intervals?
Sum them separately.
›Time zones?
All in one zone.
›Where does the formula come from?
The formula shown in the "How it works" section is the same one you'll find in standard time & date references — no proprietary tweaks or hidden weightings.
›Can I embed the Time Duration Calculator on my site?
Embedding isn't public yet, but you can link directly to this page — the URL is stable and shareable.
Embed this calculator
Drop the Time Duration Calculator into your own site or blog post. Free to use — a small “Powered by CalcPilot” link is appreciated.
<iframe src="https://calcpilot.tools/calculators/time-duration-calculator?embed=1" width="100%" height="720" style="border:1px solid #e5e7eb;border-radius:12px;max-width:720px;" loading="lazy" title="Time Duration Calculator — CalcPilot"></iframe>Related calculators
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