About this converter
Electric field strength is the force exerted on a unit positive charge at a point in space, measured in volts per meter (V/m) — equivalently, newtons per coulomb (N/C). It describes how strongly an electric field accelerates a charged particle or creates a voltage gradient across a dielectric. The higher the field strength, the greater the force on any charge in that region.
RF engineers, high-voltage equipment designers, and semiconductor process engineers convert between field strength units regularly. Antenna engineers measure radiated field in V/m and µV/m, insulation engineers specify dielectric breakdown in kV/cm, and semiconductor fabrication engineers characterize gate oxide stress in MV/cm. CGS units such as statvolt/cm appear in plasma physics and older electromagnetic analysis.
How to Use This Converter
- Enter the field strength value in the Value field.
- Select the source unit from the From dropdown.
- Select the target unit from the To dropdown.
- The converted result appears immediately.
- Use Swap to reverse the conversion direction.
Units Covered
| Unit | Symbol | Common Use |
|---|---|---|
| Volt/meter | V/m | SI unit; used in antenna theory, FCC exposure limits, and physics. |
| Kilovolt/meter | kV/m | Power line EMF measurements and high-voltage equipment specs. |
| Kilovolt/centimeter | kV/cm | Dielectric breakdown ratings; air breaks down at ~30 kV/cm. |
| Volt/centimeter | V/cm | Electrophoresis and biological cell stimulation research. |
| Millivolt/meter | mV/m | Weak-signal EMC measurements and AM radio field strength. |
| Microvolt/meter | µV/m | Receiver sensitivity and urban RF background field levels. |
| Kilovolt/inch | kV/in | US industrial insulation specifications and HV wire ratings. |
| Volt/inch | V/in | US-standard PCB spacing and wire insulation calculations. |
| Volt/mil | V/mil | PCB dielectric layer breakdown specification (1 mil = 0.001 inch). |
| Abvolt/centimeter | abV/cm | CGS electromagnetic unit; 1 abV/cm = 10⁻⁶ V/m. |
| Statvolt/centimeter | stV/cm | CGS electrostatic unit; 1 stV/cm ≈ 29,979 V/m. |
| Statvolt/inch | stV/in | Blended US-CGS unit found in older electrostatics tables. |
| Newton/coulomb | N/C | Equivalent to V/m; emphasizes the mechanical force perspective. |
How to Convert V/m to kV/m
Volts per meter to kilovolts per meter
For example, 61 V/m / 1000 = 0.061 kV/m — the FCC general population limit at 1 GHz.
Kilovolts per meter to volts per meter
For example, 30 kV/m × 1000 = 30,000 V/m — the approximate dielectric strength of air.
When You Need to Convert Electric Field Strength
RF safety engineers evaluate electromagnetic exposure limits in V/m. The FCC maximum permissible exposure for the general public at 1–2 GHz is 61 V/m; occupational limits reach 137 V/m. Base station site surveys measure field strength in V/m and µV/m, requiring conversions when comparing readings against standards published in mV/m or µV/m.
High-voltage engineers assess insulation integrity using field strength in kV/cm or kV/mm. Air has a dielectric strength of about 30 kV/cm (3 MV/m); transformer oil is rated at 100–200 kV/cm. Knowing the peak field in the correct unit prevents insulation failures. Engineers convert simulation outputs in V/m to kV/cm for direct comparison against material datasheets.
Semiconductor process engineers specify and monitor fields inside thin gate oxides in MV/cm. A 3 nm gate oxide with 1 V across it experiences a field of 3.33 MV/cm — close to the SiO₂ reliability limit of about 10 MV/cm. Converting between V/m, kV/cm, and MV/cm is essential when reviewing foundry process design rules and long-term reliability specifications.