Convert Feet per pound to Kilometres per gram
Convert Feet per pound (ft/lb) to Kilometres per gram (km/g) instantly and accurately.
Conversion Formula
km/g = ft/lb × 6.719689751e-7
About Feet per pound
The foot per pound (ft/lb) equals ≈6.720 × 10⁻⁴ km/kg, the smallest practical mass-efficiency unit. It appears in historical US Army ballistic tables and early solid-propellant rocket motor test sheets where range was in feet and propellant charge in pounds. 1 ft/lb ≈6.720 × 10⁻⁴ km/kg ≈1/3 the size of a metre per pound.
About Kilometres per gram
The kilometre per gram (km/g) equals 1000 km/kg, the unit for ultra-efficient propulsion systems and hydrogen fuel cell vehicles. A Toyota Mirai at 140 km/kg H₂ = 0.14 km/g; hypothetical rocket-propellant comparison studies use km/g to express chemical energy density. A solid-propellant gas generator releasing 1 km of equivalent travel per gram of propellant represents extreme efficiency. 1 km/g = 1000 km/kg.
Quick Reference Table
| Feet per pound (ft/lb) | Kilometres per gram (km/g) |
|---|---|
| 1 ft/lb | 6.72 × 10-7 km/g |
| 2 ft/lb | 1.344 × 10-6 km/g |
| 5 ft/lb | 3.36 × 10-6 km/g |
| 10 ft/lb | 6.72 × 10-6 km/g |
| 25 ft/lb | 1.68 × 10-5 km/g |
| 50 ft/lb | 3.36 × 10-5 km/g |
| 100 ft/lb | 6.72 × 10-5 km/g |