Convert Coulombs per metre to Coulombs per foot
Convert Coulombs per metre (C/m) to Coulombs per foot (C/ft) instantly and accurately.
Conversion Formula
C/ft = C/m × 0.3048
About Coulombs per metre
The coulomb per metre (C/m) is the SI coherent unit of linear charge density, equal to 1 A·s·m⁻¹. A typical lightning return stroke carries about 2-5 C/m along the channel; heavily charged surfaces like Van de Graaff sphere surfaces are described in C/m² (surface), but a thin wire coated with 1 C of charge per metre has a C/m linear density. Textbook Gauss's law problems routinely use C/m for infinite line-charge problems. 1 C/m = 10³ mC/m.
About Coulombs per foot
The coulomb per foot (C/ft) equals exactly 1/0.3048 C/m ≈ 3.2808 C/m, used in North American electrical engineering for charge per unit length on power cables and conductor specifications. High-voltage DC cable charge density ratings are sometimes quoted in C/ft in ANSI/NEMA specifications; lightning protection standards may express charge density per foot of conductor. 1 C/ft = 1/0.3048 C/m ≈ 3.2808 C/m.
Quick Reference Table
| Coulombs per metre (C/m) | Coulombs per foot (C/ft) |
|---|---|
| 1 C/m | 0.3048 C/ft |
| 2 C/m | 0.6096 C/ft |
| 5 C/m | 1.524 C/ft |
| 10 C/m | 3.048 C/ft |
| 25 C/m | 7.62 C/ft |
| 50 C/m | 15.24 C/ft |
| 100 C/m | 30.48 C/ft |