Convert Feet per Minute to Speed of Light
Convert Feet per Minute (ft/min) to Speed of Light (c) instantly and accurately.
Conversion Formula
c = ft/min × 1.694505604e-11
About Feet per Minute
A foot per minute (ft/min) = 5.08 × 10⁻³ m/s - the US standard for elevator speed, HVAC duct velocity, and conveyor speed. Residential lifts: 100-200 ft/min; commercial 200-400 ft/min; skyscraper express lifts 1,000-3,000 ft/min (Burj Khalifa 2,953 ft/min). HVAC low-velocity ductwork: 500-1,000 ft/min; medium-velocity 1,000-2,200 ft/min. Paper machine Fourdrinier wires: 200-6,000 ft/min. 1 ft/min = 0.00508 m/s.
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.
Quick Reference Table
| Feet per Minute (ft/min) | Speed of Light (c) |
|---|---|
| 1 ft/min | 1.695 × 10-11 c |
| 2 ft/min | 3.389 × 10-11 c |
| 5 ft/min | 8.473 × 10-11 c |
| 10 ft/min | 1.695 × 10-10 c |
| 25 ft/min | 4.236 × 10-10 c |
| 50 ft/min | 8.473 × 10-10 c |
| 100 ft/min | 1.695 × 10-9 c |