Sam Gorman

Estimate a car’s out-the-door price from the agreed price, sales tax, dealer charges, and government fees.

Calculate engine compression ratio from measured clearance or bore, stroke, chamber, gasket, deck, and piston data.

Find engine size from bore, stroke, and cylinders, or solve for missing bore or stroke. Shows liters, cc, cubic inches, and change checks.

Estimate car value by age and mileage, including miles above normal, mileage dollar effect, and future value.

Compare EV vs gas yearly savings, monthly savings, cost per mile, break-even time, and total ownership cost with your prices.

Estimate fuel, yearly costs, value loss, trip cost, and pay left after cost to see your real cost per mile.

Calculate one-way or round-trip gas cost, gallons needed, cost per mile, an optional budget range, and equal fuel shares.

Estimate miles left from tank size, MPG, fuel level, buffer, tough-condition MPG reduction, and optional gas price.

Estimate rotor replacement cost by axle, parts, labor, tax, fees, DIY or shop work, and compare a shop quote.

Estimate brake pad service costs by repair scope and axle location. Compare an optional matching shop quote with the estimate.