Convert Days to Attoseconds
Convert Days (d) to Attoseconds (as) instantly and accurately.
Conversion Formula
as = d × 8.640000000e+22
About Days
A day (d) = exactly 86,400 s. Earth's actual solar day varies ±16 s due to orbital eccentricity and axial tilt (equation of time). Leap seconds (abandoned in UTC after 2035) corrected the TAI-UT1 divergence. Mars's sol = 24 h 39 min 35 s ≈ 88,775 s; a Martian year = 668.6 sols. The day structures circadian biology, tides, and planetary science. 1 day = 86,400 s = 24 h.
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
| Days (d) | Attoseconds (as) |
|---|---|
| 1 d | 8.64 × 1022 as |
| 2 d | 1.728 × 1023 as |
| 5 d | 4.32 × 1023 as |
| 10 d | 8.64 × 1023 as |
| 25 d | 2.16 × 1024 as |
| 50 d | 4.32 × 1024 as |
| 100 d | 8.64 × 1024 as |