Car calculators
Free calculators for the everyday costs of driving: trip gas cost, MPG, your gas budget, cost per mile, annual mileage, the next oil change, mileage reimbursement, and tire age. Enter your own numbers; every calculation runs in your browser, and each page shows its formula and sources.
Gas and MPG
- MPG calculatorYour real gas mileage from the miles you drove and the gallons you added.
- Trip gas cost calculatorWhat a drive will cost in gas, from distance, MPG, and gas price.
- Gas cost per mile calculatorWhat each mile costs you in fuel, for budgeting or comparing cars.
- Gas money calculatorSplit the gas cost of a ride or road trip between people.
- Gas budget calculatorWhat gas costs you per week, month, and year.
Mileage rates and reimbursement
- Mileage reimbursement calculatorMiles times a rate per mile: what you are owed or can claim.
- IRS mileage rateThe current IRS rate and past rates, with the rate for any trip date.
- Annual mileage calculatorYour miles per year from two odometer readings, and a lease check.
Maintenance
Tires
How these calculators work
Each calculator shows the formula it uses, so you can check the math. Rates and reference numbers come from primary sources, such as the IRS, the EPA, and NHTSA, and each page shows the date we last checked them. The full list is on our data sources page. Results are estimates based on what you enter. They are not tax or financial advice.