Automobile Engineering Tools & Calculators

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Automobile Engineering Tools & Calculators

Engine Displacement Calculator

Bore Diameter (mm)

Stroke Length (mm)

Number of Cylinders

Displacement = (π/4) × bore² × stroke × cylinders

Compression Ratio Calculator

Swept Volume (cc)

Clearance Volume (cc)

CR = (Swept Volume + Clearance Volume) / Clearance Volume

Air-Fuel Ratio Calculator

Air Mass (g)

Fuel Mass (g)

AFR = Air Mass / Fuel Mass

Engine Horsepower Calculator

Torque (lb-ft)

RPM

HP = (Torque × RPM) / 5252

Fuel Efficiency Calculator

Distance Traveled (miles)

Fuel Used (gallons)

MPG = Distance / Fuel Used

Tire Size Calculator

Width (mm)

Aspect Ratio (%)

Wheel Diameter (inches)

Height = (Width × Aspect Ratio / 100) × 2 / 25.4 + Wheel Diameter

Braking Distance Calculator

Speed (mph)

Coefficient of Friction

Distance = (Speed²) / (254 × Coefficient)

Gear Ratio Calculator

Driven Gear Teeth

Driver Gear Teeth

Gear Ratio = Driven Teeth / Driver Teeth

Vehicle Speed Calculator

Engine RPM

Tire Circumference (inches)

Gear Ratio

Final Drive Ratio

Speed = (RPM × Tire Circumference) / (Gear Ratio × Final Drive × 336)

Fuel Cost Calculator

Trip Distance (miles)

Vehicle MPG

Fuel Price ($/gallon)

Cost = (Distance / MPG) × Price

Torque to HP Conversion

Torque (lb-ft)

RPM

HP = (Torque × RPM) / 5252

Quarter Mile Calculator

Vehicle Weight (lbs)

Horsepower

ET = (Weight / HP)^1/3 × 5.825

Engineer's Tools | Engineering Tools & Calculators