Convert durations between seconds, minutes, hours, days, weeks, months and years.
100% client-side · nothing is uploaded
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How to use the Time Units
Enter the number you want to convert in the Value field.
Pick the unit you're converting From and the unit you want To.
Read the converted result, or use ⇅ to swap the two units.
Check the All units table to see your value expressed in every supported unit at once.
Privacy: this tool runs entirely in your browser. Your input is never sent to, received by, or stored on any server — there are no uploads and no tracking of what you enter.
About Time Units
Time units
From milliseconds up to years, time units relate by fixed factors (60 seconds per minute, 60 minutes per hour, 24 hours per day).
Approximate units
Months and years vary in length; this tool uses 30-day months and 365-day years for quick estimates.
Where it helps
Converting durations for projects, cooking, programming timeouts and everyday planning.
Frequently asked questions
How many seconds in a day?
86,400 seconds.
Are months exact?
No — this uses a 30-day approximation since real months differ.
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