Simple, private calculators for what your car really costs to run. Every result comes with a plain-English explanation of how it was worked out.
What charging an electric car at home costs per month, compared with a gas car.
Compare the monthly and yearly running cost of an electric and a gas car.
How much fuel a trip will use and what it will cost.
Add each leg of a road trip to see the fuel cost per leg and in total.
Convert between US mpg, UK mpg, L/100 km and km/L as you type.
What your car really costs per mile or km, with fuel, insurance and more.
Your monthly car payment, total interest and total amount repaid.
Estimate a monthly lease payment, split into depreciation and finance fee.
Estimate what your car will be worth each year and how much value it loses.
Compare two tire sizes and see how a change affects your speedometer.
Each tool uses the same basic energy and fuel arithmetic your car's trip computer and your utility bill use. Every page explains the formula, the assumptions behind it, and where real-world results can differ.
Everything is calculated in your browser. The numbers you type in are not sent to our servers or stored.
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