About ChargingTimeCalculator.com | Who Builds This and Why

ChargingTimeCalculator.com is a free set of calculators that work out how long batteries, electric cars and capacitors take to charge, and shows each step of the math. Most people arrive with one question: will the car be ready by morning, how long until the RV battery is full, which resistor gives a one-second delay. Each calculator answers it in a few seconds and lays out the steps, so you can check the math or redo it by hand.

What is on the site

Calculators for battery charging time, EV charging time and cost, 12 V car batteries, solar, charging current, runtime and capacitors. The EV charging time chart covers every electric car and plug-in hybrid since 2018 from EPA test data. The guides, FAQ and glossary explain the terms and the formulas.

Independent

No carmaker, charger brand or utility pays for what appears here. Facts come from public sources, linked where they are used: the EPA's data on fueleconomy.gov, the Department of Energy, the Energy Information Administration and Battery University. The methodology page lists every formula and assumption.

Contact

Spotted an error, or want a calculator added? Email hello@chargingtimecalculator.com.