Electric Field Strength Converter
Electric field strength (E) is force per unit charge: 1 V/m = 1 N/C. Used in high-voltage engineering, insulation design, antenna near-field calculations, and EMC analysis.
Common Electric Field Strength Conversions
| From | To |
|---|---|
| 1 kV/m | 1,000 V/m |
| 1 MV/m | 1,000,000 V/m |
| 1 V/cm | 100 V/m |
| 1 kV/cm | 100,000 V/m |
| 1 mV/mm | 1 V/m |
| Air breakdown | ~3 MV/m (3 kV/mm) |
Electric Field Strength Unit Definitions
- V/m (volt/meter)
- SI unit of electric field strength.
- kV/m (kilovolt/meter)
- High-voltage lines and industrial applications.
- MV/m (megavolt/meter)
- Lightning, vacuum breakdown, and research.
- V/cm
- Common in physics labs and textbooks.
- mV/mm
- Equivalent to V/m; small-scale measurements.
Frequently Asked Questions
What electric field strength is dangerous?
Air breaks down at ~3 MV/m (3 kV/mm). Fields above 10 kV/m at skin surface cause sensation. High-voltage arcing occurs across gaps at ~3 kV per mm of air.
What is the field near a high-voltage power line?
Directly under a 400 kV transmission line: ~10 kV/m. At 50 m distance: below 1 kV/m. Most countries limit public exposure to 5–10 kV/m.
How do you convert electric field to voltage?
For a uniform field: V = E × d, where d is the gap distance. Example: E = 10 kV/m across 1 cm gap gives V = 100 V.