Convert Seconds to Attoseconds
Convert Seconds (s) to Attoseconds (as) instantly and accurately.
Conversion Formula
as = s × 1.000000000e+18
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 Attoseconds
An attosecond (as) = 10⁻¹⁸ s - the timescale of electron dynamics in atoms. The Bohr-model orbital period in hydrogen is ~152 as. Electron tunnelling through atomic potential barriers takes a few hundred as. The 2023 Nobel Prize in Physics (Agostini, Krausz, L'Huillier) honoured methods for generating sub-100 as pulses via high-harmonic generation in Ti:sapphire lasers. 1 as = 10⁻¹⁸ s = 1,000 zs.
Quick Reference Table
| Seconds (s) | Attoseconds (as) |
|---|---|
| 1 s | 1 × 1018 as |
| 2 s | 2 × 1018 as |
| 5 s | 5 × 1018 as |
| 10 s | 1 × 1019 as |
| 25 s | 2.5 × 1019 as |
| 50 s | 5 × 1019 as |
| 100 s | 1 × 1020 as |