Convert Weeks to Seconds
Convert Weeks (wk) to Seconds (s) instantly and accurately.
Conversion Formula
s = wk × 604800
About Weeks
A week (wk) = exactly 7 days = 604,800 s. The 7-day week derives from Babylonian astronomy assigning one of the seven classical celestial bodies to each day - preserved in English (Sun-day, Mon-day, Satur-day) and Romance language day names. It spread globally via Jewish, Christian, and Islamic calendars. ISO 8601 numbers weeks 1-52(53) with Monday as day 1. 365-day years contain 52 weeks + 1 day. 1 wk = 7 d = 604,800 s.
About Seconds
The second (s) is the SI base unit of time, defined since 1967 as exactly 9,192,631,770 periods of the caesium-133 ground-state hyperfine transition at 0 K. Caesium fountain clocks realise this to ~10⁻¹⁶ (1 s lost per ~300 million years); optical lattice clocks (Sr, Yb) reach ~10⁻¹⁸. The second links to the metre via the defined speed of light c = 299,792,458 m/s exactly. 1 s = 1,000 ms = 1/60 min.
Quick Reference Table
| Weeks (wk) | Seconds (s) |
|---|---|
| 1 wk | 604800 s |
| 2 wk | 1209600 s |
| 5 wk | 3024000 s |
| 10 wk | 6048000 s |
| 25 wk | 15120000 s |
| 50 wk | 30240000 s |
| 100 wk | 60480000 s |