Weeks to Seconds Converter

About the wk to s calculation

One week is exactly 604,800 seconds, so converting between them is a single multiplication. Enter any value above and the result updates as you type. Seven days, or 604,800 seconds. The only common time unit with no astronomical basis. The SI base unit of time, defined by the radiation period of the caesium-133 atom.

Formula

s = wk × 604,800

1 wk = 604,800 s
1 s = 0.00000165 wk

Worked example

To convert 4 wk, multiply by 604,800: 4 × 604,800 = 2,419,200 s.

Frequently asked questions

How many seconds are in a week?

There are 604,800 seconds in one week. To convert any amount, multiply the number of weeks by 604,800.

How do I convert seconds back to weeks?

Divide instead of multiplying, or equivalently multiply by 0.00000165. One second is 0.00000165 weeks.

Is this conversion exact?

For seconds through weeks, yes — they are fixed multiples. The year is the mean Gregorian year of 365.2425 days, which is an average rather than the length of any particular calendar year.

Where is each of these units used?

Weeks: seven days, or 604,800 seconds. The only common time unit with no astronomical basis. Seconds: the SI base unit of time, defined by the radiation period of the caesium-133 atom.

Sources

• NIST Special Publication 811 — Guide for the Use of the International System of Units