Convert Femtoseconds to Planck Time
Convert Femtoseconds (fs) to Planck Time (t_P) instantly and accurately.
Conversion Formula
t_P = fs × 1.854858440e+28
About Femtoseconds
A femtosecond (fs) = 10⁻¹⁵ s - the timescale of molecular vibrations and chemical reactions. Bond stretching: 10-200 fs; bending: 50-500 fs. Ahmed Zewail won the 1999 Nobel Prize in Chemistry for femtochemistry, capturing transition states in real time. Ti:sapphire lasers produce 10-100 fs pulses; LASIK uses 10-100 fs for precise corneal cuts. At 800 nm, one optical cycle = 2.67 fs. Light travels 300 nm in 1 fs. 1 fs = 10⁻¹⁵ s.
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
| Femtoseconds (fs) | Planck Time (t_P) |
|---|---|
| 1 fs | 1.855 × 1028 t_P |
| 2 fs | 3.71 × 1028 t_P |
| 5 fs | 9.274 × 1028 t_P |
| 10 fs | 1.855 × 1029 t_P |
| 25 fs | 4.637 × 1029 t_P |
| 50 fs | 9.274 × 1029 t_P |
| 100 fs | 1.855 × 1030 t_P |