12 units
Time Converter
Convert between sub-second units (ms, μs, ns), everyday units (s, min, hr, day, week) and longer spans (month, year, decade, century).
Popular time conversions
Common time conversions
| From | Equivalent |
|---|---|
| 1 s | 1000 ms · 0.016667 min · 0.000278 h · 1.1574e-5 d · 1.6534e-6 wk |
| 5 s | 5000 ms · 0.083333 min · 0.001389 h · 5.7870e-5 d · 8.2672e-6 wk |
| 10 s | 10000 ms · 0.166667 min · 0.002778 h · 0.000116 d · 1.6534e-5 wk |
| 100 s | 100000 ms · 1.666667 min · 0.027778 h · 0.001157 d · 0.000165 wk |
| 1000 s | 1000000 ms · 16.666667 min · 0.277778 h · 0.011574 d · 0.001653 wk |
How the conversion works
Linear in seconds. 1 minute = 60 s, 1 hour = 3,600 s, 1 day = 86,400 s, 1 Gregorian year = 31,556,952 s.
When you'll use this converter
- Project planning (days ↔ hours ↔ minutes)
- Programming (ms, μs, ns timing)
- Astronomy (light-years, decades, centuries)
- Finance and contracts (months, years)
Frequently asked
How many seconds in a year?
A Gregorian year averages 365.2425 days × 86,400 s ≈ 31,556,952 seconds.
Why is the average month 30.44 days?
Because 365.2425 days ÷ 12 ≈ 30.44 days. Individual months vary from 28 to 31 days.
Is the month value here calendar-accurate?
No — this is the statistical average month. For an exact calendar month difference, use a date-aware calculator.
All time conversions
Every time pair we convert, with a worked example and formula on each page.