Time Converter
- 1 x 604800 604800 second
- 604800 / 60 10080 minute
This page converts a time from one unit into another. Every value passes through the second, the SI unit time is held in, and time stays time: a unit only converts inside its own dimension.
How do you convert a duration between seconds, minutes, hours and days?
Pick the unit you have, pick the unit you want, and type the value. The page multiplies by the factor between the two and prints the arithmetic under the result, so the answer and the working are the same object.
One hour is 3600 s and one day is 86 400 s. The steps are 60, 60, 24 and 7, so work through them in order rather than shifting a decimal point.
- Choose the unit your value is in. This page opens on the week.
- Choose the unit you want it in. This page opens on the minute.
- Type the value. The result and the factor behind it appear together.
- Read the working. It converts into the second first and out again, which is the same two lines you would write by hand.
Time Conversion Table
One row per unit this page offers, each measured against the second. The last column says whether the factor is a definition or a reading of one.
| Unit | Symbol | In the SI unit | Exact? |
|---|---|---|---|
| millisecond | ms | 0.001 | exact |
| second | s | 1 | exact |
| minute | min | 60 | exact |
| hour | h | 3600 | exact |
| day | d | 86400 | exact |
| week | wk | 604800 | exact |
Worked Examples
The question the bank ranked highest for this page, answered with the working.
How many minutes are in a week?
- 1 x 604800 604800 second
- 604800 / 60 10080 minute
1 wk = 10080 min
Where These Factors Come From
Every number above is read from the knowledge base rather than computed for the page. These are the statements it holds for time.
- The units of time are not decimal: 1 minute is 60 s, 1 hour is 3600 s, 1 day is 86 400 s and 1 week is 604 800 s. The minute, hour and day are accepted for use with the SI but are not SI units.
- How this page reports a result result in the target time unit; the non-decimal steps 60, 60, 24 and 7 are applied in order
SI prefixes on this page
| Prefix | Symbol | Factor |
|---|---|---|
| milli | m | 10^-3 |
Why Are the Time Factors Not Decimal?
The second is the SI unit. The minute, hour, day and week are accepted for use with the SI without being decimal multiples of it, so a duration is converted by working through the steps in order rather than by moving a decimal point.
The rule behind this factor is the same for every unit - how a conversion factor works.
Frequently Asked Questions
How many seconds are in a day?
86 400 s.
Why are the units of time not decimal?
They were counted long before the metric system and were never renumbered. The second is the SI unit; the minute, hour and day are accepted for use with the SI without being powers of ten of it.
Is the minute an SI unit?
No. The second is the SI base unit; the minute, hour and day are accepted for use with the SI but are not SI units.
How many hours are in a week?
168 hours.
Related Conversions
The rest of the family sits on back to the unit converters.