How to use the capacitor dielectric breakdown voltage calculator
Estimate breakdown voltage across an insulating gap. Enter dielectric strength, gap in the fields above; the breakdown voltage is computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “spark gap”, “air breakdown”, “insulation gap”, “calculate capacitor dielectric breakdown voltage”, “find breakdown voltage”.
Formula
Variables
- E — Dielectric strength (MV/m)
- d — Gap (mm)
Worked example
With dielectric strength = Air, gap = 2 mm, the calculator gives breakdown voltage ≈ 6 kV.
Frequently asked questions
What is the capacitor dielectric breakdown voltage calculator used for?
Estimate breakdown voltage across an insulating gap. It helps with questions such as “spark gap”, “air breakdown”, “insulation gap”.
What is the formula for the capacitor dielectric breakdown voltage calculation?
Breakdown voltage (kV) = E × d. Here E is dielectric strength (MV/m), d is gap (mm).
What inputs do I need for the capacitor dielectric breakdown voltage calculator?
You need dielectric strength in MV/m, gap in mm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the capacitor dielectric breakdown voltage calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the capacitor dielectric breakdown voltage result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.