69 car calculators that get the numbers right.
Ownership costs, fuel and EVs, horsepower, tuning, tires and towing. No signup, no paywalls.
Browse · 7 topics
Cost of Ownership 14 calculators
- Car Depreciation CalculatorHow much value your car loses
- Car Lease vs Buy CalculatorLease or buy your next car?
- Car Maintenance Cost CalculatorYearly maintenance by age and mileage
- Car Ownership vs Rideshare CalculatorOwn a car or go car-free?
- Car Payment CalculatorYour monthly car payment
- Commute Cost CalculatorWhat your commute costs each year
- Cost Per Mile CalculatorYour true cost per mile to drive
- Engine Hours to Miles CalculatorEngine hours to equivalent miles
- EV Home Charger Install Cost CalculatorCost to install a home EV charger
- Idling Fuel Cost CalculatorFuel and money wasted idling
- Lease Mileage Overage CalculatorWill you go over your lease miles?
- Miles Per Year CalculatorYour average miles per year
- Oil Change Interval CalculatorWhen your next oil change is due
- Road Trip Fuel Cost CalculatorFuel cost for a multi-stop road trip
Fuel & EVs 7 calculators
- EV Charging Cost CalculatorEV charging cost per mile
- EV vs Gas Cost CalculatorTotal cost of an EV vs. a gas car
- Fuel Cost CalculatorFuel cost for any trip
- Fuel Savings CalculatorSavings from better gas mileage
- Gas vs Electric CalculatorGas vs. electric cost of ownership
- MPG CalculatorYour car's miles per gallon
- Used EV Battery Health & Resale Value CalculatorUsed EV battery range and resale value
Speed & Horsepower 11 calculators
- 0-60 MPH Calculator0-60 time from power and weight
- Boost Horsepower CalculatorHorsepower gained from boost
- BSFC CalculatorBrake specific fuel consumption
- Drag Horsepower CalculatorHorsepower needed to beat drag
- Dyno Correction Factor CalculatorSTD-style estimate; humidity omitted
- Horsepower CalculatorHorsepower from quarter-mile speed
- Horsepower to Torque CalculatorHorsepower to torque
- Power-to-Weight Ratio CalculatorPower-to-weight ratio
- Quarter-Mile ET CalculatorQuarter-mile time from power and weight
- Torque to Horsepower CalculatorTorque to horsepower
- Wheel Horsepower CalculatorCrank vs. wheel horsepower
Engine & Gearing 9 calculators
- Compression Ratio CalculatorCompression ratio from volumes
- Compression Ratio to PSI CalculatorCompression ratio to cranking PSI
- Engine Compression Ratio Calculator (Bore & Stroke)Compression ratio from bore and stroke
- Engine Displacement CalculatorEngine displacement from bore and stroke
- Final Drive Ratio CalculatorYour final drive ratio
- Gear Ratio CalculatorGear ratio, speed and RPM
- RPM from Speed CalculatorEngine RPM at any road speed
- Shift Point RPM CalculatorThe best RPM to shift gears
- Volumetric Efficiency CalculatorEngine volumetric efficiency
Tuning & Fluids 9 calculators
- Coolant Mixture CalculatorAntifreeze and water to mix
- E85 Blend CalculatorMix E85 and gas to a target blend
- Fuel Injector Size CalculatorInjector size for your horsepower
- Fuel Pump Sizing CalculatorFuel pump flow for your horsepower
- Gas-Oil Ratio CalculatorTwo-stroke oil to add to gas
- Intercooler Sizing CalculatorIntercooler core size you need
- Nitrous Jetting CalculatorNon-installable jet-area illustration
- Turbo Size CalculatorTurbo airflow for your power goal
- Two-Stroke Fuel Mix CalculatorTwo-stroke mix for several cans
Tires, Wheels & Brakes 13 calculators
- Battery CCA CalculatorCold cranking amps your battery needs
- Bolt Pattern CalculatorMeasure a wheel's bolt pattern
- Brake Fade / Rotor Sizing CalculatorBrake heat and fade risk
- Gear Ratio for Speed CalculatorAxle ratio for your cruise RPM
- Plus Sizing CalculatorBigger wheels, same tire diameter
- Speedometer Error CalculatorSpeedometer error after new tires
- Stopping Distance CalculatorBraking distance by speed and road
- Tire Diameter CalculatorTire diameter from sidewall size
- Tire Pressure by Temperature CalculatorHow temperature changes tire pressure
- Tire Rotation Interval CalculatorWhen to rotate your tires
- Tire Size CalculatorCompare tire sizes side by side
- Wheel Backspacing CalculatorWheel offset to backspacing
- Wheel Offset CalculatorHow a new offset moves your wheel
Towing & Hauling 6 calculators
- Axle Ratio CalculatorHow axle ratio affects towing
- GVWR/GCWR CalculatorWeight margin under GVWR and GCWR
- Payload Capacity CalculatorPayload you have left
- Towing Capacity CalculatorHow much you can safely tow
- Trailer Tongue Weight CalculatorThe right tongue weight for a trailer
- Winch Size CalculatorWinch rating for your vehicle