Disclaimer

Last updated: September 2026. Please read this page carefully before using our calculators.

Educational information only

All content on FuelWise — calculators, articles, tables, and examples — is published for general educational purposes. It is not financial or automotive advice and is not a substitute for a qualified professional. We are not financial advisor or licensed automotive professionals, and no client or advisory relationship is created by your use of this Site.

Fuel costs, electricity rates, and vehicle efficiency vary by region, season, driving style, and vehicle condition. Our calculators use the figures you enter plus standard formulas — they are planning estimates, not price quotes.

Tire size comparisons affect speedometer readings, gearing, and legal compliance. Before changing tire sizes, verify fitment and local regulations with a qualified tire professional.

Accuracy of calculations

We implement well-known, publicly documented formulas (see the methodology section on each calculator page and EPA and DOE public fuel-economy guidance as applicable). Even correctly implemented formulas produce estimates that depend on your inputs and assumptions. Real-world outcomes vary. Do not rely on a single web tool for a consequential decision.

Advertising disclosure

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Errors and corrections

If you spot an error, please email hello@fuelwise.app with the inputs you used. Verified corrections are published promptly.