Convert Picofarads per centimetre to Picofarads per metre
Convert Picofarads per centimetre (pF/cm) to Picofarads per metre (pF/m) instantly and accurately.
Conversion Formula
pF/m = pF/cm × 100
About Picofarads per centimetre
The picofarad per centimetre (pF/cm) equals 10⁻¹⁰ F/m = 100 pF/m, used for transmission-line capacitance per unit length in RF engineering. A standard 50 Ω air-dielectric coaxial line has capacitance per unit length ≈67 pF/m ≈0.67 pF/cm; PTFE coax gives ≈0.9 pF/cm. RF substrate characterisation often quotes pF/cm. 1 pF/cm = 10⁻¹⁰ F/m.
About Picofarads per metre
The picofarad per metre (pF/m) equals 10⁻¹² F/m, the most widely used permittivity scale. The vacuum permittivity ε₀ ≈ 8.854 pF/m; air at STP is ≈8.859 pF/m; PTFE PCB substrate is ≈19 pF/m; FR-4 laminate is ≈37 pF/m. Dielectric specifications in IPC-4101 and IEC 60250 list pF/m values. 1 pF/m = 10⁻¹² F/m.
Quick Reference Table
| Picofarads per centimetre (pF/cm) | Picofarads per metre (pF/m) |
|---|---|
| 1 pF/cm | 100 pF/m |
| 2 pF/cm | 200 pF/m |
| 5 pF/cm | 500 pF/m |
| 10 pF/cm | 1000 pF/m |
| 25 pF/cm | 2500 pF/m |
| 50 pF/cm | 5000 pF/m |
| 100 pF/cm | 10000 pF/m |