Convert Zeptoseconds to Planck Time
Convert Zeptoseconds (zs) to Planck Time (t_P) instantly and accurately.
Conversion Formula
t_P = zs × 1.854858440e+22
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.
About Planck Time
The Planck time (t_P) = √(ℏG/c⁵) ≈ 5.391 × 10⁻⁴⁴ s — the time for light to travel one Planck length (~1.616 × 10⁻³⁵ m). Below this scale, general relativity and quantum mechanics both break down; a theory of quantum gravity is needed. No physical process or instrument approaches this timescale — it is a theoretical lower bound. Introduced by Max Planck in 1899. 1 t_P ≈ 5.391 × 10⁻⁴⁴ s.
Quick Reference Table
| Zeptoseconds (zs) | Planck Time (t_P) |
|---|---|
| 1 zs | 1.855 × 1022 t_P |
| 2 zs | 3.71 × 1022 t_P |
| 5 zs | 9.274 × 1022 t_P |
| 10 zs | 1.855 × 1023 t_P |
| 25 zs | 4.637 × 1023 t_P |
| 50 zs | 9.274 × 1023 t_P |
| 100 zs | 1.855 × 1024 t_P |