Convert Kilograms per square metre per second to Pounds per square foot per second
Convert Kilograms per square metre per second (kg/(m²·s)) to Pounds per square foot per second (lb/(ft²·s)) instantly and accurately.
Conversion Formula
lb/(ft²·s) = kg/(m²·s) × 0.2048161436
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).
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).
Quick Reference Table
| Kilograms per square metre per second (kg/(m²·s)) | Pounds per square foot per second (lb/(ft²·s)) |
|---|---|
| 1 kg/(m²·s) | 0.204816 lb/(ft²·s) |
| 2 kg/(m²·s) | 0.409632 lb/(ft²·s) |
| 5 kg/(m²·s) | 1.02408 lb/(ft²·s) |
| 10 kg/(m²·s) | 2.04816 lb/(ft²·s) |
| 25 kg/(m²·s) | 5.1204 lb/(ft²·s) |
| 50 kg/(m²·s) | 10.2408 lb/(ft²·s) |
| 100 kg/(m²·s) | 20.4816 lb/(ft²·s) |