🧮 Calculators
Time Duration Calculator
Find the exact duration between two dates or times. See years, months, days, hours, minutes, and totals. Perfect for timesheets, project planning, or curiosity.
⏰ Used 9,514 times this month
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Total duration
Also expressed as
Years
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Months
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Weeks
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Days
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Hours
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Minutes
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Seconds
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How it works
01
Pick Dates
Start and end date-time using the pickers.
02
Calculate
Instant breakdown in every unit.
03
Use It
Copy for timesheets, contracts, project logs.
Frequently asked questions
How does it handle time zones?
Uses your browser's local time zone for both dates. If comparing dates across zones, convert them to the same zone first.
Does it account for leap years?
Yes. The calculation uses actual calendar arithmetic, so it correctly includes leap days between February 29 and any later date.
What if the end date is before the start?
Duration shows as negative. Swap them if you want a positive number.
Can I calculate business days only?
Not yet — this shows raw calendar duration. Business day calculators are on our roadmap.
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