Seconds to Weeks Converter

About the s to wk calculation

One second is exactly 0.00000165 weeks, so converting between them is a single multiplication. Enter any value above and the result updates as you type. The SI base unit of time, defined by the radiation period of the caesium-133 atom. Seven days, or 604,800 seconds. The only common time unit with no astronomical basis.

Formula

wk = s × 0.00000165

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

Worked example

To convert 3,600 s, multiply by 0.00000165: 3,600 × 0.00000165 = 0.00595238 wk.

Frequently asked questions

How many weeks are in a second?

There are 0.00000165 weeks in one second. To convert any amount, multiply the number of seconds by 0.00000165.

How do I convert weeks back to seconds?

Divide instead of multiplying, or equivalently multiply by 604,800. One week is 604,800 seconds.

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?

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

Sources

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