Automotive

Practical calculators to help with vehicle maintenance, repairs, tire sizing, fuel economy, and everyday automotive projects.

Compare tire sizes, calculate overall diameter, sidewall height, and speedometer differences between tire options.

Calculate fuel costs for a trip based on distance, fuel economy, and current fuel prices.

Estimate when your next oil change is due based on your current mileage and recommended service interval.

Estimate your vehicle battery's age, expected lifespan, and when it may be time for a replacement.

Estimate safe trailer weights and towing limits based on your vehicle's specifications and cargo load.

Calculate tightening torque using common unit conversions and compare torque values in foot-pounds, inch-pounds, and newton-meters.