Convert Coulombs per square metre to Coulombs per square inch
Convert Coulombs per square metre (C/m²) to Coulombs per square inch (C/in²) instantly and accurately.
Conversion Formula
C/in² = C/m² × 0.00064516
About Coulombs per square metre
The coulomb per square metre (C/m²) is the SI coherent unit of surface charge density, equal to 1 A·s·m⁻². A parallel-plate capacitor with 1 C/m² on each plate produces a gap field of 1/ε₀ ≈ 113 GV/m; realistic capacitor plate densities are 10-100 µC/m²; charge density on a sphere at electrical breakdown of air is about 27 µC/m². 1 C/m² = 10³ mC/m² = 10⁶ µC/m².
About Coulombs per square inch
The coulomb per square inch (C/in²) equals exactly 1/(0.0254)² C/m² ≈ 1 550.003 C/m², used in US insulation and dielectric material withstand specifications. Dielectric strength ratings for polymeric films in US datasheets are sometimes cross-referenced with C/in² for high-voltage applications; electrostatic precipitator collector plate performance is quoted in C/in² in some NEMA standards. 1 C/in² ≈ 1 550 C/m².
Quick Reference Table
| Coulombs per square metre (C/m²) | Coulombs per square inch (C/in²) |
|---|---|
| 1 C/m² | 0.00064516 C/in² |
| 2 C/m² | 0.00129032 C/in² |
| 5 C/m² | 0.0032258 C/in² |
| 10 C/m² | 0.0064516 C/in² |
| 25 C/m² | 0.016129 C/in² |
| 50 C/m² | 0.032258 C/in² |
| 100 C/m² | 0.064516 C/in² |