Automotive Calculators
Last updated: October 2026
Car Affordability Calculator
Calculate the maximum car price you can afford based on your monthly income, down payment, loan rate, and term.
Engine Displacement Calculator
Calculate an engine's total displacement from bore, stroke and number of cylinders, in cubic centimeters, liters or cubic inches.
Vehicle Depreciation Calculator
Estimate your vehicle's current market value by factoring in age, mileage, vehicle type, and condition.
RPM to Speed Calculator
Convert engine RPM into real vehicle speed in miles per hour using tire size and final drive ratio.
Tire Size & Speedometer Calculator
Find out exactly how swapping to a different tire size shifts your speedometer reading and changes overall tire diameter.
Horsepower from Torque Calculator
Calculate engine horsepower from torque in lb-ft and engine speed in RPM with HP = torque Γ RPM Γ· 5,252, plus the metric versions of the formula.
EV Charging Cost & Time Calculator
Estimate the total cost of charging your EV from one state of charge to another, including charging losses and any time-based (per-minute or idle) session fees that depend on charger speed.
Quarter Mile Time Calculator
Estimate how fast your car will run the quarter mile based on its power-to-weight ratio.
Engine CFM Calculator
Calculate the carburetor or throttle body airflow requirement (in CFM) for an engine based on displacement and maximum RPM.
Gas Mileage Calculator
Work out your car's real gas mileage (MPG) from the miles driven and gallons used between two fill-ups, or show it in liters per 100 km.
Auto Lease Calculator
Estimate the monthly payment on a car lease from the negotiated price, down payment, residual value, lease term, money factor and sales tax.
PSI to Bar Converter
Convert pressure between pounds per square inch (psi) and bar in either direction, for tires, compressors, hydraulics and gauges.