Time Converter
Convert durations between milliseconds and weeks. Days and weeks are treated as exact 24-hour days, which is what you want for durations, timers and calculations.
minutes
1 h = 60 min
Popular time conversions
Units in this converter
| Unit | Symbol | Equals (in seconds) |
|---|---|---|
| Millisecond | ms | 0.001 s |
| Second | s | 1 s |
| Minute | min | 60 s |
| Hour | h | 3,600 s |
| Day | d | 86,400 s |
| Week | wk | 604,800 s |
Fixed-length days
This converter treats a day as exactly 86,400 seconds. Real calendar days can be 23 or 25 hours long when clocks change for daylight saving time. Months and years are not included because their length varies.
About the units
- Millisecond (ms)
- A millisecond is one thousandth of a second. Computer response times, audio latency and reaction times are typically measured in milliseconds.
- Second (s)
- The second is the SI base unit of time. It is defined by atomic physics: 9,192,631,770 oscillations of the radiation from a caesium-133 atom.
- Minute (min)
- A minute is 60 seconds.
- Hour (h)
- An hour is 60 minutes, or 3,600 seconds.
- Day (d)
- A day here means exactly 24 hours (86,400 seconds). Calendar days can differ: a day with a daylight saving time change lasts 23 or 25 hours on the clock.
- Week (wk)
- A week is 7 days, which is 168 hours or 604,800 seconds.
Frequently asked questions
How do I convert decimal hours to hours and minutes?
Keep the whole number as hours and multiply the decimal part by 60 for minutes. For example, 2.75 hours is 2 hours and 0.75 × 60 = 45 minutes.