Automotive Calculators

Estimate quarter-mile time and trap speed from weight and horsepower (Hale), plus a power-limited lower bound for 0-60 mph.

Vehicle value year by year by straight-line, declining-balance or your own yearly percentage drops, with total loss.

Engine displacement in cc, litres and cubic inches from bore, stroke and cylinders; compression ratio and mean piston speed.

EV efficiency in kWh per 100 miles, miles per kWh, Wh per km and MPGe, range from battery size, and cost versus a gas car.

Trip fuel and cost for legs with different mileage (city, highway), tank range, refuel stops, cost per person and a second car.

Engine RPM at a road speed (or speed at an RPM) from tire size, axle ratio and transmission gear ratios, with a table by gear.

Lease versus buy over the lease term: lease payment from money factor and residual, loan payment, resale equity and net cost.

Stopping distance from speed: reaction distance plus braking distance on dry, wet, snow or ice, with road grade.

Tire dimensions from size codes like 225/45R17, and speedometer and odometer error when you change to a different size.

Towing check in pounds: payload left after people, cargo and tongue weight, tow rating and combined weight limits.