Convert Seconds to Zeptoseconds
Convert Seconds (s) to Zeptoseconds (zs) instantly and accurately.
Conversion Formula
zs = s × 1.000000000e+21
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.
About Zeptoseconds
A zeptosecond (zs) = 10⁻²¹ s. In 2020, physicists at Goethe University Frankfurt measured the H₂ photoionisation time at ~247 zs - the first direct event measurement at this timescale. W-boson lifetime ~300 zs; strong-force quark confinement dynamics ~1-3 zs. These timescales are resolved via the energy-time uncertainty relation and lattice-QCD simulations. 1 zs = 10⁻²¹ s = 1,000 ys.
Quick Reference Table
| Seconds (s) | Zeptoseconds (zs) |
|---|---|
| 1 s | 1 × 1021 zs |
| 2 s | 2 × 1021 zs |
| 5 s | 5 × 1021 zs |
| 10 s | 1 × 1022 zs |
| 25 s | 2.5 × 1022 zs |
| 50 s | 5 × 1022 zs |
| 100 s | 1 × 1023 zs |