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Free Tools

Free tools for auto shops

Practical calculators and lookups for drivers and shop owners. No signup, no payment, no email required. Bookmark them and come back whenever.

For drivers

VIN Decoder

Decode any VIN to year, make, model, engine, and recall history. Powered by NHTSA.

For drivers

OBD-II Code Lookup

Decode the check-engine light. Plain-English causes, symptoms, and repair-cost ranges.

For drivers

Maintenance Schedule

When to service your vehicle — oil intervals, timing belts, fluids, with cost estimates.

For drivers

Tire Size Calculator

Compare OEM vs new tires. Diameter delta, speedometer error, revs per mile.

For drivers

Gas Cost Calculator

Weekly, monthly, and annual fuel cost from your MPG, miles, and local gas price.

For drivers

Auto Loan Calculator

Monthly payment, total interest, and down-payment savings. Straight math, no dealer games.

For drivers

Coolant Type Lookup

Factory coolant spec, color, interval, and aftermarket cross-reference by make and year.

For drivers

IRS Mileage Deduction

Business, medical, and charity mileage at the current IRS standard rate. For 1099 filers.

For shop owners

Labor Quote Calculator

Build customer quotes from your labor rate, book hours, parts cost, and markup.