Time Converter
Convert a duration between time units, from milliseconds up to years. Months and years are the awkward ones — they aren't fixed lengths — so this uses the standard approximations of 30 days and 365 days, and says so plainly rather than hiding it.
1 hours =
60 minutes
- milliseconds
- 3,600,000
- seconds
- 3,600
- hours
- 1
- days
- 0.04166667
- weeks
- 0.00595238
- months (30 days)
- 0.00138889
- years (365 days)
- 0.00011416
Nothing is uploaded — this tool runs inside your browser, so your files never leave your device.
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Why use this tool
- Milliseconds through to years in one table
- States its month and year assumptions instead of hiding them
- Full conversion table under every answer
- Instant, free, nothing uploaded
How it works
- 1Enter the duration you want to convert.
- 2Choose the units to convert from and to.
- 3Read the answer and the full table.
Time Converter — frequently asked questions
86,400 — that's 24 hours × 60 minutes × 60 seconds. Leap seconds occasionally make a real day one second longer, but no conversion tool accounts for those.
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