Free Car Calculators and Tools
Free car calculators and templates that run in your browser. No sign-up, and the numbers you enter stay on your device.
- Car maintenance schedule
- Fuel cost calculator
- MPG calculator
- Vehicle maintenance log
- Mileage reimbursement
- Oil change interval
- Service reminder builder
- Tire pressure
- Tire size
- Car loan
- Lease vs buy
- Depreciation
- Maintenance cost
- Cost of ownership
- EV charging cost
- Fuel economy converter
- Mileage log template
Maintenance
- Car Maintenance Schedule by Mileage: Free car maintenance schedule generator: enter your mileage and driving style to see what's due now, what's next and what to check yourself.
- Oil Change Interval Calculator: Work out when your next oil change is due by miles and date, based on oil type, driving conditions and your last change.
- Free Car Service Reminder: Create a free car service reminder for your calendar: pick the service, the due date or mileage, and download an .
- Free Vehicle Maintenance Log Template: Download a free vehicle maintenance log as PDF, Excel/CSV or Google Sheets.
- Car Maintenance Cost Calculator: Estimate yearly car maintenance and repair costs from mileage and car age, using AAA's per-mile average as a baseline you can adjust.
Fuel and EV
- Fuel Cost Calculator for Any Trip: Calculate fuel cost for a trip or a month from distance, fuel economy and price.
- MPG Calculator: Calculate your real MPG, km/L or L/100km from two fill-ups, with the full-tank method explained and tips to improve the result.
- Fuel Economy Converter: Convert fuel economy between US MPG, UK MPG, L/100km and km/L instantly, with a conversion table and the formulas behind it.
- EV Charging Cost Calculator: Estimate the cost to charge an electric car per charge, per month and per mile, from battery size or efficiency and your electricity price.
Tires
- Tire Size Calculator: Compare two tire sizes: overall diameter, sidewall height, width, revs per mile and speedometer error.
- Tire Pressure Calculator and Guide: Convert tire pressure between PSI, bar and kPa, adjust for temperature, and learn where to find your car's correct pressure.
Costs and finance
- Cost of Car Ownership Calculator: Add up depreciation, fuel, insurance, maintenance, finance and fees to see what your car really costs per year, per month and per mile.
- Car Depreciation Calculator: Estimate how much value your car loses each year and what it may be worth later, using a declining-balance model you can adjust.
- Car Loan Calculator: Work out your monthly car payment, total interest and payoff schedule from price, down payment, APR and term.
- Lease vs Buy Car Calculator: Compare the total cost of leasing vs buying a car over the same period, including payments, fees, interest and the car's value at the end.
Mileage and taxes
- Mileage Reimbursement Calculator: Calculate mileage reimbursement or deduction at the 2026 IRS rates (72.
- Free Mileage Log Template: Free mileage log template with the columns the IRS expects: date, purpose, start and end odometer, miles.