How this ev charger amperage calculator works
Current is estimated from power divided by voltage and the selected power-factor/efficiency value.
How to use it
- Charging power. Enter the value in kW.
- Voltage. Enter the value in V.
- Power factor / efficiency. Enter the value in %.
- Request the result. Add your email, then select “Email & show my result.”
What to do with the number
Electrical circuit sizing and continuous-load requirements are governed by local electrical rules and equipment ratings, not this arithmetic alone. Use the charger installation manual and a qualified electrician for circuit sizing.
Planning estimate
Use this result as a starting point, not a guarantee. Product specifications, site conditions, manufacturer guidance, local codes, taxes, labor, tolerances, and rounding can change the real requirement or cost.