Convert Pounds per square foot per hour to Milligrams per square metre per hour
Convert Pounds per square foot per hour (lb/(ft²·h)) to Milligrams per square metre per hour (mg/(m²·h)) instantly and accurately.
Conversion Formula
mg/(m²·h) = lb/(ft²·h) × 4882427.636
About Pounds per square foot per hour
The pound per square foot per hour (lb/(ft²·h)) equals 0.45359237/(0.09290304 × 3600) ≈ 1.356 × 10⁻³ kg/(m²·s). It is used in US heat and mass transfer texts (e.g., Perry's Chemical Engineers' Handbook) for mass flux through surfaces in drying, absorption, and distillation operations using consistent BTU-lb-h units. 1 lb/(ft²·h) ≈ 1.356 g/(m²·s).
About Milligrams per square metre per hour
The milligram per square metre per hour (mg/(m²·h)) equals 10⁻⁶/3600 ≈ 2.778 × 10⁻¹⁰ kg/(m²·s). It is the standard unit in corrosion science and protective-coating industry for measuring corrosion rate or moisture vapour transmission rate (MVTR) of membranes and packaging films. Rates of 1-100 mg/(m²·h) are typical for polymer films. 1 mg/(m²·h) = 10⁻³ g/(m²·h).
Quick Reference Table
| Pounds per square foot per hour (lb/(ft²·h)) | Milligrams per square metre per hour (mg/(m²·h)) |
|---|---|
| 1 lb/(ft²·h) | 4882430 mg/(m²·h) |
| 2 lb/(ft²·h) | 9764860 mg/(m²·h) |
| 5 lb/(ft²·h) | 24412100 mg/(m²·h) |
| 10 lb/(ft²·h) | 48824300 mg/(m²·h) |
| 25 lb/(ft²·h) | 122061000 mg/(m²·h) |
| 50 lb/(ft²·h) | 244121000 mg/(m²·h) |
| 100 lb/(ft²·h) | 488243000 mg/(m²·h) |