Free Vehicle Calculators & Tools
Over 1,439 professional automotive calculators. From engine performance to maintenance planning - everything you need for vehicle repair and optimization.
Featured Calculators
View AllEngine Displacement Calculator
Calculate engine displacement in cubic centimeters (cc) or cubic inches (ci) from bore and stroke measurements.
Miles Per Gallon Calculator
Calculate your vehicle fuel economy from distance traveled and fuel used.
Tire Size Calculator
Decode tire size meaning and calculate tire dimensions from the sidewall markings (e.g., P235/45R17).
Compression Ratio Calculator
Calculate static compression ratio from cylinder volume, chamber volume, and piston specifications.
Fuel Cost Calculator
Calculate the fuel cost for a trip based on distance, MPG, and fuel price.
Tire Size Comparison Calculator
Compare two tire sizes to see the difference in diameter, speedometer error, and more.
Horsepower Calculator
Calculate horsepower from torque and RPM, or estimate horsepower from quarter mile times.
Quarter Mile Calculator
Estimate quarter mile ET and trap speed from vehicle weight and horsepower.
Browse by Category
Engine & Performance
Calculate engine displacement, horsepower, torque, compression ratio, and performance metrics.
Fuel & Efficiency
Calculate fuel economy, trip costs, range estimates, and fuel system requirements.
Tire & Wheel
Tire size calculators, speedometer correction, wheel fitment, and tire pressure tools.
Electrical System
Battery sizing, wire gauge, amperage, voltage drop, and electrical load calculators.
Transmission & Drivetrain
Gear ratio, final drive, RPM at speed, and drivetrain calculators.
Brake System
Brake force, stopping distance, rotor sizing, and brake system calculators.
Suspension & Steering
Spring rate, ride height, alignment, and suspension geometry calculators.
Cooling System
Radiator sizing, coolant mix, thermostat selection, and cooling capacity tools.
HVAC & Climate
Air conditioning, heating, and climate control calculators.
Maintenance & Service
Service intervals, fluid capacities, filter schedules, and maintenance planners.
Cost & Finance
Total cost of ownership, loan payments, depreciation, and vehicle cost calculators.
Towing & Hauling
Towing capacity, payload, tongue weight, and trailer calculators.
Unit Converters
Convert between metric and imperial units for all automotive measurements.
Diagnostic Tools
OBD code lookup, sensor analysis, and diagnostic calculators.
Racing & Performance
Quarter mile, lap time, drag racing, and track performance calculators.
Fleet Management
Fleet tracking, utilization, maintenance scheduling, and cost analysis tools.
Environmental & Emissions
Carbon footprint, emissions calculations, and environmental impact tools.
Safety Calculators
Stopping distance, reaction time, and vehicle safety calculators.
Paint & Body
Paint coverage, color matching, and body repair calculators.
Audio & Electronics
Speaker box, amplifier, and car audio system calculators.
Fluid Calculators
Oil capacity, coolant mix, fluid specifications, and lubrication calculators.
Motorcycle Specific
Motorcycle-specific calculators for gearing, suspension, and performance.
Truck & Heavy Duty
Commercial truck, diesel, and heavy-duty vehicle calculators.
Electric Vehicle
EV range, charging time, battery health, and electric vehicle calculators.
Hybrid Vehicle
Hybrid system analysis, fuel savings, and PHEV calculators.
Classic & Vintage
Classic car restoration, valuation, and vintage vehicle calculators.
Commercial Vehicle
Bus, delivery, and commercial fleet calculators.
Marine Crossover
Boat towing, marine engine, and watercraft calculators.
General Automotive Math
Basic automotive calculations, physics, and engineering formulas.
Most Popular
General Math Tool 42
General Automotive Math
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General Automotive Math
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General Automotive Math
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General Automotive Math
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General Automotive Math
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General Automotive Math
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General Automotive Math
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General Automotive Math
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General Automotive Math
Why Use Our Vehicle Calculators?
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Built with industry-standard formulas used by professional mechanics and engineers worldwide.
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Get immediate calculations without any page reloads. All processing happens right in your browser.
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