Convert Speed of Light to Centimetres per Second
Convert Speed of Light (c) to Centimetres per Second (cm/s) instantly and accurately.
Conversion Formula
cm/s = c × 29979245800
About Speed of Light
The speed of light in vacuum (c) = exactly 299,792,458 m/s - the defined SI constant from which the metre is derived (since 1983) and the universal speed limit of causality. Light from the Sun reaches Earth in 8 min 20 s; from the Moon in 1.28 s; from Proxima Centauri in 4.24 years. Mars communication delay 3-22 minutes. In optical fibre (n ≈ 1.467), c/n ≈ 200,000 km/s. GPS clocks must correct for both special and general relativistic effects. c = 299,792,458 m/s.
About Centimetres per Second
A centimetre per second (cm/s) is 10⁻² m/s - the speed of slow animals, gentle breezes, and lab syringe pumps. Tortoises travel 0.5-1.5 cm/s; the fastest garden snail record is ~1.3 cm/s. A gentle breeze that barely moves leaves is Beaufort 1 ≈ 50-100 cm/s. Drug-delivery syringe pumps run 0.01-10 cm/s. Coarse silt settles in still water at ~0.2 cm/s (Stokes' law). Capacitive touch sensors detect finger motion at 1-10 cm/s. 1 cm/s = 0.01 m/s.
Quick Reference Table
| Speed of Light (c) | Centimetres per Second (cm/s) |
|---|---|
| 1 c | 2.998 × 1010 cm/s |
| 2 c | 5.996 × 1010 cm/s |
| 5 c | 1.499 × 1011 cm/s |
| 10 c | 2.998 × 1011 cm/s |
| 25 c | 7.495 × 1011 cm/s |
| 50 c | 1.499 × 1012 cm/s |
| 100 c | 2.998 × 1012 cm/s |