Convert Shakes to Weeks
Convert Shakes (sh) to Weeks (wk) instantly and accurately.
Conversion Formula
wk = sh × 1.653439153e-14
About Shakes
A shake = exactly 10 ns (10⁻⁸ s) - the informal unit for fission prompt-neutron generation time, coined at Los Alamos during the Manhattan Project (1943-1945). A prompt-neutron generation in a supercritical core takes ~1-10 shakes; a full explosive chain reaction unfolds over ~50-100 shakes. The name alludes to 'two shakes of a lamb's tail'. Still used in reactor physics and weapons-design calculations. 1 shake = 10 ns.
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.
Quick Reference Table
| Shakes (sh) | Weeks (wk) |
|---|---|
| 1 sh | 1.653 × 10-14 wk |
| 2 sh | 3.307 × 10-14 wk |
| 5 sh | 8.267 × 10-14 wk |
| 10 sh | 1.653 × 10-13 wk |
| 25 sh | 4.134 × 10-13 wk |
| 50 sh | 8.267 × 10-13 wk |
| 100 sh | 1.653 × 10-12 wk |