Car math for agents: tire size and speedometer error, gearing and RPM, trip fuel, EV efficiency, towing, depreciation, lease versus buy, engines and braking.
payments ON MAINNET (real money) · 10 live endpoints
| Endpoint | Price | What it answers |
|---|---|---|
GET /acceleration-estimate | $0.02 | Estimate quarter-mile time and trap speed from weight and horsepower (Hale), plus a power-limited lower bound for 0-60 mph. |
GET /depreciation | $0.02 | Vehicle value year by year by straight-line, declining-balance or your own yearly percentage drops, with total loss. |
GET /engine-calc | $0.02 | Engine displacement in cc, litres and cubic inches from bore, stroke and cylinders; compression ratio and mean piston speed. |
GET /ev-efficiency | $0.02 | 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. |
GET /fuel-trip-cost | $0.02 | Trip fuel and cost for legs with different mileage (city, highway), tank range, refuel stops, cost per person and a second car. |
GET /gear-rpm | $0.02 | 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. |
GET /lease-vs-buy | $0.02 | Lease versus buy over the lease term: lease payment from money factor and residual, loan payment, resale equity and net cost. |
GET /stopping-distance | $0.02 | Stopping distance from speed: reaction distance plus braking distance on dry, wet, snow or ice, with road grade. |
GET /tire-compare | $0.02 | Tire dimensions from size codes like 225/45R17, and speedometer and odometer error when you change to a different size. |
GET /towing-payload | $0.02 | Towing check in pounds: payload left after people, cargo and tongue weight, tow rating and combined weight limits. |
GET /catalog returns this list as JSON. Activity hub · uptime.
Automotive calculators using standard formulas and your inputs, provided as is. Results are estimates: real tire size, gearing, towing, braking and performance depend on the specific vehicle, loading, road and conditions. Always follow the manufacturer's ratings and your local law; this is not engineering, safety, financial or legal advice. Every paid response carries a disclaimer field.