Convert Feet per pound to Metres per kilogram
Convert Feet per pound (ft/lb) to Metres per kilogram (m/kg) instantly and accurately.
Conversion Formula
m/kg = ft/lb × 0.6719689751
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 Metres per kilogram
The metre per kilogram (m/kg) is the SI coherent derived unit of mass-based fuel efficiency. It is used in combustion research, rocket propellant comparative testing, and laboratory fuel-cell efficiency benchmarking. A car at 15 km/kg petrol = 15 000 m/kg; a hydrogen fuel cell bus at 120 km/kg H₂ = 120 000 m/kg. 1 m/kg = 1e⁻³ km/kg = 1/1000 km/kg.
Quick Reference Table
| Feet per pound (ft/lb) | Metres per kilogram (m/kg) |
|---|---|
| 1 ft/lb | 0.671969 m/kg |
| 2 ft/lb | 1.34394 m/kg |
| 5 ft/lb | 3.35984 m/kg |
| 10 ft/lb | 6.71969 m/kg |
| 25 ft/lb | 16.7992 m/kg |
| 50 ft/lb | 33.5984 m/kg |
| 100 ft/lb | 67.1969 m/kg |