Automotive Calculator

  • Engine Displacement Calculator
    Calculate total engine displacement from bore, stroke, and cylinder count. Get results in cc, liters, and cubic inches instantly with this free tool.
  • Crawl Ratio Calculator
    Calculate your 4x4 crawl ratio from transmission, transfer case, and axle gear ratios. Find total low-range reduction for off-road rock crawling.
  • Carburetor CFM Calculator
    Calculate the carburetor CFM your engine needs from displacement (CID), max RPM, and volumetric efficiency. Free, fast carburetor sizing tool.
  • Boost Horsepower Calculator
    Estimate boosted horsepower from your naturally aspirated HP and boost pressure (PSI). Quick turbo and supercharger power gain calculator.
  • Car Crash Calculator
    Estimate the average impact force of a car crash from mass, speed and stopping distance. Also gives kinetic energy, deceleration and g-force.
  • Rolling Resistance Calculator
    Calculate rolling resistance force from the coefficient, mass and gravity using F = Crr·N = Crr·m·g. Free, instant physics calculator.
  • Quarter Mile Calculator
    Estimate your car's quarter mile elapsed time (ET) and trap speed from vehicle weight and engine horsepower using Hale's classic formulas.
  • Boat Loan Calculator
    Estimate your monthly boat loan payment, total interest, and total cost from the loan amount, interest rate, and term in years.
  • Car Center of Mass Calculator
    Find your car's center of mass (CG) location from axle weights and wheelbase. Calculates distance from front and rear axles plus weight distribution.
  • Torque to Horsepower Calculator
    Convert torque (lb-ft) and engine RPM to horsepower instantly. Uses hp = (torque × RPM) ÷ 5252. Free, accurate automotive power calculator.
  • EV Mileage Calculator
    Calculate EV mileage accurately with this EV Mileage Calculator. Input total distance, battery capacity, initial and final charge to determine electric vehicle efficiency and range.
  • Bike Speed Calculator
    Calculate your bike speed from cadence, gear ratio (chainring/cog) and wheel size. Get results in km/h, mph and m/s instantly.
  • Bike Cadence Calculator
    Calculate your cycling cadence (pedal RPM) from speed, wheel circumference, and gear ratio. Free, instant bike cadence calculator for any gearing.
  • Bike Cadence and Speed Calculator
    Calculate cycling speed from cadence, gear ratio and wheel size. Find your speed in km/h and mph from chainring, cog and wheel circumference.
  • Compression Ratio Calculator
    Calculate engine compression ratio (CR) from bore, stroke and clearance volume. Computes swept displacement and CR instantly for any cylinder.
  • Compression Ratio to PSI Calculator
    Convert engine compression ratio to estimated cranking PSI using the polytropic formula P = P_atm × CR^n. Adjust exponent and atmospheric pressure.
  • Fuel Pump Calculator
    Calculate the fuel pump flow (LPH, lb/hr, gal/hr, cc/min) needed for your target horsepower using BSFC and pump duty cycle.
  • GVWR Calculator
    Calculate your vehicle's available payload from GVWR by subtracting curb weight, passengers, and cargo. Free GVWR payload capacity calculator in lbs.
  • Speedometer Gear Calculator
    Calculate the correct driven gear teeth for an accurate speedometer from drive gear teeth, tire revs/mile, and speedo revs/mile.
  • Tesla Charging Cost Calculator
    Estimate the cost to charge your Tesla. Enter battery size, charge percent, efficiency and electricity price to get the cost per charging session.
  • Wheel Offset Calculator
    Convert wheel width and backspacing into offset (ET) in millimeters. Find positive, negative, or zero offset instantly for any wheel fitment.
  • Winch Size Calculator
    Calculate the minimum winch capacity for your vehicle using its weight and a safety factor. Find the right rated line pull for safe recovery.
  • Annual Fuel Cost Calculator
    Estimate your yearly fuel cost from miles driven, MPG, and fuel price. See annual, monthly, per-gallon, and per-mile costs instantly.
  • Cost per Mile Calculator
    Calculate your cost per mile by dividing total cost by total miles driven. Great for trucking, fleets, deliveries, and personal vehicle expense tracking.

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