Time converter
Calculator
The calculator needs JavaScript. The tables below give the same numbers for common cases.
How it is worked out
- Convert to the base unit (second): 1 × 3,600 = 3,600.
- Divide by the size of the target unit: 3,600 ÷ 60 = 60 min.
| Unit | Equals |
|---|---|
| millisecond (ms) | 1 ms = 0.001 seconds |
| second (s) | 1 s = 1 seconds |
| minute (min) | 1 min = 60 seconds |
| hour (h) | 1 h = 3,600 seconds |
| day (day) | 1 day = 86,400 seconds |
| week (wk) | 1 wk = 604,800 seconds |
| month (average, 30.4375 days) (mo) | 1 mo = 2,629,800 seconds |
| year (365 days) (yr) | 1 yr = 31,536,000 seconds |
How to use it
A minute is 60 seconds, an hour 3,600 seconds, a day 86,400 seconds and a week 7 days. Months and years vary, so the page uses fixed conventions: a year is 365 days and a month is the average of 30.4375 days (365.25 ÷ 12).
For exact calendar differences between two dates, use the days between dates calculator.
Frequently asked questions
How many seconds are in a day?
86,400.
How many days are in a year?
365 here (366 in a leap year).
How many weeks are in a year?
About 52.14.
Method: standard arithmetic shown step by step; no outside data is used. Checked 2026-11-12.
Written by Calculators Free Editorial Team · Data checked 2026-11-12
About · How we verify this · Editorial policy · Corrections
About · How we verify this · Editorial policy · Corrections
General information only. Results are plain arithmetic on the numbers you enter; check anything important (money, health, school work) against your own records or the official source.