A second has 1,000 milliseconds (ms), and 1 millisecond is 0.001 seconds. A minute is 60,000 ms, an hour 3,600,000 ms and a day 86,400,000 ms.
1,000 milliseconds
1 second = 1,000 milliseconds
| Unit | Amount |
|---|---|
| Milliseconds | 1,000 |
| Minutes | 0.0167 |
| Hours | 0.0002778 |
| Days | 0.00001157 |
| Weeks | 0.000001653 |
| Months | 0.0000003803 |
| Years | 0.00000003169 |
| Decades | 0.000000003169 |
| Centuries | 0.000000000317 |
How it’s calculated
Every unit is converted through seconds: 1 minute = 60 s, 1 hour = 3,600 s, 1 day = 86,400 s, 1 week = 604,800 s. Months and years use the Gregorian average: 1 year = 365.2425 days = 31,556,952 s, 1 month = 1/12 year = 2,629,746 s.
Worked example with your numbers
- 1 second × 1 seconds per second = 1 seconds.
- 1 seconds ÷ 0.001 seconds per millisecond = 1,000 milliseconds.
Quick answer
A second has 1,000 milliseconds (ms), and 1 millisecond is 0.001 seconds.
- 1 second
- 1,000 ms
- 1 ms
- 0.001 seconds
- 1 minute
- 60,000 ms
- 1 hour
- 3,600,000 ms
| Unit | Seconds | Days | Years |
|---|---|---|---|
| 1 millisecond | 0.001 | 0.00000001157 | 0.000000000032 |
| 1 second | 1 | 0.00001157 | 0.00000003169 |
| 1 minute | 60 | 0.0006944 | 0.000001901 |
| 1 hour | 3,600 | 0.041667 | 0.0001141 |
| 1 day | 86,400 | 1 | 0.00273791 |
| 1 week | 604,800 | 7 | 0.01916535 |
| 1 month | 2,629,746 | 30.436875 | 0.08333333 |
| 1 year | 31,556,952 | 365.2425 | 1 |
| 1 decade | 315,569,520 | 3,652.425 | 10 |
| 1 century | 3,155,695,200 | 36,524.25 | 100 |
1 decade = 10 years; 1 century = 100 years; 1 millennium = 1,000 years. Months and years use the Gregorian average (365.2425 days a year).
How it works
“Milli” means one thousandth: seconds = milliseconds ÷ 1,000, and milliseconds = seconds × 1,000. 250 ms is a quarter of a second.
Frequently asked questions
How many seconds is 500 milliseconds?
0.5 seconds.