Convert Pounds per square foot per second to Kilograms per square metre per second
Convert Pounds per square foot per second (lb/(ft²·s)) to Kilograms per square metre per second (kg/(m²·s)) instantly and accurately.
Conversion Formula
kg/(m²·s) = lb/(ft²·s) × 4.882427636
About Pounds per square foot per second
The pound per square foot per second (lb/(ft²·s)) equals 0.45359237/0.09290304 ≈ 4.882 kg/(m²·s). It is the coherent FPS mass flux unit, used in US aerospace for rocket motor mass flux, ballistic studies, and hypervelocity heat-shield ablation rate specifications. 1 lb/(ft²·s) ≈ 4.882 kg/(m²·s).
About Kilograms per square metre per second
The kilogram per square metre per second (kg/(m²·s)) is the SI coherent unit of mass flux density, equal to 1 kg·m⁻²·s⁻¹. It appears directly in the continuity equation (ṁ = ρv) and in Stefan's law for evaporation. Rocket nozzle throat mass flux can reach 500-2000 kg/(m²·s); convective heat exchangers: 100-500 kg/(m²·s). 1 kg/(m²·s) = 1 000 g/(m²·s).
Quick Reference Table
| Pounds per square foot per second (lb/(ft²·s)) | Kilograms per square metre per second (kg/(m²·s)) |
|---|---|
| 1 lb/(ft²·s) | 4.88243 kg/(m²·s) |
| 2 lb/(ft²·s) | 9.76486 kg/(m²·s) |
| 5 lb/(ft²·s) | 24.4121 kg/(m²·s) |
| 10 lb/(ft²·s) | 48.8243 kg/(m²·s) |
| 25 lb/(ft²·s) | 122.061 kg/(m²·s) |
| 50 lb/(ft²·s) | 244.121 kg/(m²·s) |
| 100 lb/(ft²·s) | 488.243 kg/(m²·s) |