Free tools

Free Car Tools

Handy calculators and visualizers for your build — no signup, completely free.

Every tool is free, runs instantly in your browser, and needs no signup.

Tire Size Calculator

Compare two tire sizes, see diameter difference, sidewall and speedometer error instantly. Free tire size calculator.

See how different window tint darkness levels (5%, 20%, 35%, 50%, 70% VLT) look before you commit. Free tint visualizer.

Estimate 0-100 km/h, quarter-mile and power-to-weight from horsepower and weight. Free car performance calculator.

Decode a VIN: region, model year, WMI and check-digit validity. Free VIN decoder, no signup.

Where to find your car paint code, and browse factory colors by model. Free paint code locator.

VLT explained + preview any tint shade, with legal limits by region.

Compare wheel width and offset (ET) to see how much a new wheel pokes or tucks — and check inner clearance before you buy.

Look up common wheel bolt patterns (PCD) by make and model — 5x112, 5x114.3, 5x120 and more.

Estimate 0-60 mph, quarter-mile ET and trap speed from power and weight. A quick guide, not a spec.

Work out your monthly and yearly fuel cost from economy, distance and fuel price — metric or imperial.

See realistic price ranges for a full vinyl wrap or respray by vehicle size — then preview the look first.

See how a tyre size change affects your speedometer reading and effective gearing.

Estimate reaction, braking and total stopping distance from speed, reaction time and road condition.

Work out your car's hp-per-tonne and see where it sits — hot hatch, sports, supercar.

Estimate your monthly car payment, total cost and interest from amount, term and APR.