Apps
Free online car tools and calculators for DIY mechanics and vehicle owners. Use these apps to estimate fuel costs, compare tire sizes, convert repair units, plan maintenance, check diagnostics, and solve common auto tasks online.
Tire Pressure Calculator — Cold PSI by Temperature
Tire Pressure Adjustment Calculator Calculate the correct cold tire pressure for current temperature, load, and altitude. Pressure drops about 1 PSI per 10°F drop in....
Tire Pressure Converter – PSI to Bar to kPa
Tire Pressure Converter Convert tire pressure between PSI, Bar, and kPa instantly — match any tyre gauge to your door-placard spec. Tire Pressure Converter PSI....
Tire Size Calculator – Diameter, Width & Sidewall
Tire Size Calculator Enter any tire code — 205/55R16, 275/35R20 — and instantly get width, sidewall height, overall diameter, and circumference. Tyre Size Calculator Enter....
Tire Size Comparison – Compare Two Tire Sizes
Tire Size Comparison Compare two tire sizes side-by-side — see diameter difference, speedometer error, and ground clearance change. Tire Size Comparison Tool Two codes →....
Tire Size Comparison — Diameter & Speedo Error
Tire Size Comparison Compare two tire sizes side-by-side for overall diameter, sidewall height, contact patch width, and speedometer error percentage. Essential when upgrading wheels, plus-sizing,....
Tire Tread Depth Calculator — 32nds, mm & Miles
Tire Tread Depth Calculator Convert tire tread depth between 32nds of an inch and millimeters, estimate remaining tread life from your wear rate, and check....
Torque Converter – Nm to lb-ft & kg-m
Torque Converter Convert torque between Newton-metres, pound-feet, and kilogram-metres instantly — essential for tightening to spec. Torque Unit Converter Nm ⇄ lb-ft ⇄ kg-m Torque....
Towing Capacity Checker — GCWR & Hitch Class
Towing Capacity Checker Match a tow vehicle to a trailer. Calculator covers Gross Combined Weight Rating (GCWR), tongue weight, hitch class, and trailer brakes by....
Trade-In Value Estimator — Dealer vs Private
Trade-In Value Estimator Estimate your car’s trade-in value at a dealer vs the higher private-party sale price. The gap is usually 15–25% — selling privately....
Trailer Brake Controller Guide – Required Capacity by Trailer
Trailer Brake Controller Guide Find out whether your trailer legally requires a brake controller and which type — proportional or time-delayed — best suits your....
