The Car Itself Calculators — AutoMath

Car Depreciation Calculator
Projects a vehicle's value year by year using a configurable depreciation curve, including the year-one cliff and brand-specific retention. Best when timing a sale or estimating equity.
Gas vs Electric Total Cost
Side-by-side total cost of an internal-combustion car vs an equivalent EV over your ownership period — purchase, energy, maintenance, incentives. Best when cross-shopping a gas car against an EV.
New vs Used Car Calculator
Compares the true cost of a new car against a used equivalent over your hold — depreciation, maintenance, and insurance — and prices the premium you pay to buy new. Best when deciding whether the new-car premium is worth it.
Tire Size Calculator
Converts tire size notation to real dimensions and computes the speedometer error and revs-per-mile change when switching to a different size. Best before buying replacement or plus-size tires.
Towing Capacity & Payload
Checks a trailer + cargo + passenger load against a vehicle's tow rating, GVWR, and payload — including tongue weight — to flag an over-limit setup. Best before towing a trailer, boat, or camper.