EV charging time

How long a charge takes: from current % to target % at a given charger power, with losses included.

Calculated in this browser. Nothing is sent anywhere.

With taper on, power falls linearly from 100% at 80% charge to 25% at 100% (typical DC curve). Time = wall energy ÷ effective average kW. Real curves differ by vehicle and temperature.

How to use

  1. Enter battery size, current and target charge %.
  2. Enter charger power (and efficiency if known).
  3. Read the time and energy needed.

What it supports

Assumes constant power — real cars taper near full charge, so 80→100 % takes longer than the estimate. Default 90 % efficiency; adjust if your car reports wall-to-battery losses. Time = kWh needed ÷ (kW × efficiency).

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