Depreciation, EV math, tires, towing.
What the car is worth over time, gas vs electric, and the physical-spec math most owners get wrong.
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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.
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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.
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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.
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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.