Practical utilities for the automotive parts counter — VIN decoder, margin & markup calculator, NATO phonetic converter, tire size calculator, and unit converter.
Paste a 17-digit VIN — get year, make, model, engine, trim, and drivetrain from the NHTSA database instantly.
Decode a VINEnter any two of cost, resale, margin%, or markup% — get the other two instantly. Gross profit and markup side by side.
Calculate profitType a VIN or part number — see the NATO phonetic equivalent in real time. Highlights the last 8 VIN digits automatically.
Convert to NATOFind every safe replacement tire size for your vehicle — color-coded by safety (green/orange/red) across all common rim diameters. Includes speedometer error analysis.
Find safe sizesType a value and see every conversion at once. Covers length (in↔mm), volume (L↔gal), weight (lb↔kg), and fuel economy (MPG↔L/100km).
Convert units