Convert Standard gravity to Miles per hour per second

Convert Standard gravity (g₀) to Miles per hour per second (mph/s) instantly and accurately.

Conversion Formula

mph/s = g₀ × 21.93685129

About Standard gravity

Standard gravity (g₀) is defined as exactly 9.80665 m/s² by the 3rd CGPM (1901), chosen to approximate surface gravity at ~45.5° latitude. It is the universal reference for human g-tolerance: fighter pilots sustain up to +9 g₀ with G-suit; sustained +3 g₀ causes greyout unprotected; F1 drivers experience +5 g₀ lateral and -4 g₀ braking. Pound-force is defined as 0.45359237 kg × g₀ = 4.44822 N (exact). Rocket specific impulse in seconds = thrust / (mass flow × g₀). 1 g₀ = 9.80665 m/s² = 980.665 Gal ≈ 32.174 ft/s² ≈ 35.304 km/h/s.

About Miles per hour per second

The mile per hour per second (mph/s) equals exactly 0.44704 m/s², the natural acceleration unit for road vehicles in the US and UK where speed is measured in mph. A 0-60 mph time of 2.0 s (Tesla Model S Plaid) gives 30 mph/s ≈ 13.4 m/s²; a typical family car at 8.5 s gives 7.1 mph/s ≈ 3.2 m/s². Emergency braking for Amtrak trains requires at least 26 mph/s ≈ 11.6 m/s². 1 mph/s = 0.44704 m/s² (exact) ≈ 4.56 × 10⁻² g₀.

Quick Reference Table

→ Full Acceleration Converter