Convert Coulombs per US gallon to Femtocoulombs per cubic metre
Convert Coulombs per US gallon (C/gal (US)) to Femtocoulombs per cubic metre (fC/m³) instantly and accurately.
Conversion Formula
fC/m³ = C/gal (US) × 2.641720524e+17
About Coulombs per US gallon
The coulomb per US gallon (C/gal) equals exactly 1/(231×(0.0254)³) C/m³ ≈264.172 C/m³, used in electrochemical water-treatment and flow-battery engineering in North America. Electrocoagulation systems are specified by charge dosage in C/gal (US) of treated water; flow battery electrolyte charge state is monitored in C/gal in North American plant documentation. 1 C/gal (US) ≈264.172 C/m³.
About Femtocoulombs per cubic metre
The femtocoulomb per cubic metre (fC/m³) equals 10⁻¹⁵ C/m³, the scale for charge density in the interstellar medium. The diffuse interstellar medium has electron density ~3×10⁴ /m³, giving charge density ≈5 fC/m³; radiation belt proton charge density in the inner Van Allen belt is in the fC/m³ range. 1 fC/m³ = 10⁻¹⁵ C/m³ = 10⁻³ pC/m³.
Quick Reference Table
| Coulombs per US gallon (C/gal (US)) | Femtocoulombs per cubic metre (fC/m³) |
|---|---|
| 1 C/gal (US) | 2.642 × 1017 fC/m³ |
| 2 C/gal (US) | 5.283 × 1017 fC/m³ |
| 5 C/gal (US) | 1.321 × 1018 fC/m³ |
| 10 C/gal (US) | 2.642 × 1018 fC/m³ |
| 25 C/gal (US) | 6.604 × 1018 fC/m³ |
| 50 C/gal (US) | 1.321 × 1019 fC/m³ |
| 100 C/gal (US) | 2.642 × 1019 fC/m³ |