Car and energy calculators

Monthly car payment and total interest with sales tax, fees, down payment and trade-in.

Monthly lease payment from MSRP, residual, money factor and sales tax, split into depreciation and finance charge.

Convert a lease money factor to APR and back, and see the monthly finance charge.

Compare the cost of leasing with buying on a loan over the same term, including the car's value at the end.

Turn a monthly budget into the car price you can afford, with a 20/4/10 rule check.

Work out miles per gallon from a fill-up and convert between MPG, L/100 km and km/L.

Fuel cost for a trip or commute from miles, MPG and gas price, starting at the EIA national average.

Yearly fuel cost of a gas car against charging an EV, with your miles and prices.

Diameter, width and sidewall in inches from a tire size, plus the speedometer error against another size.

Cost to charge an electric car at home or a public charger, from battery size, charge level and price per kWh.

Daily, monthly and yearly cost to run an appliance from its watts, hours of use and your rate.