Convert Coulombs per inch to Femtocoulombs per metre
Convert Coulombs per inch (C/in) to Femtocoulombs per metre (fC/m) instantly and accurately.
Conversion Formula
fC/m = C/in × 3.937007874e+16
About Coulombs per inch
The coulomb per inch (C/in) equals exactly 1/0.0254 C/m ≈ 39.370 C/m, used in insulation specifications and dielectric withstand testing at the component level. Dielectric tape and insulating sleeve charge retention is sometimes expressed in C/in in US industry datasheets; PCB creepage and clearance charge density specifications for high-voltage designs appear in C/in. 1 C/in = 1/0.0254 C/m ≈ 39.370 C/m.
About Femtocoulombs per metre
The femtocoulomb per metre (fC/m) equals 10⁻¹⁵ C/m, arising in scanning probe measurements of charged surface features and in single-molecule electrostatic force microscopy. A single elementary charge (1.6 × 10⁻¹⁹ C) localised on a 1 µm polymer segment gives about 0.16 fC/m; EFM tip-sample interaction models use fC/m-scale induced charge distributions. 1 fC/m = 10⁻¹⁵ C/m = 10⁻³ pC/m.
Quick Reference Table
| Coulombs per inch (C/in) | Femtocoulombs per metre (fC/m) |
|---|---|
| 1 C/in | 3.937 × 1016 fC/m |
| 2 C/in | 7.874 × 1016 fC/m |
| 5 C/in | 1.969 × 1017 fC/m |
| 10 C/in | 3.937 × 1017 fC/m |
| 25 C/in | 9.843 × 1017 fC/m |
| 50 C/in | 1.969 × 1018 fC/m |
| 100 C/in | 3.937 × 1018 fC/m |