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.
VIN Decoder
Decode any VIN to year, make, model, engine, and recall history. Powered by NHTSA.
For driversOBD-II Code Lookup
Decode the check-engine light. Plain-English causes, symptoms, and repair-cost ranges.
For driversMaintenance Schedule
When to service your vehicle — oil intervals, timing belts, fluids, with cost estimates.
For driversTire Size Calculator
Compare OEM vs new tires. Diameter delta, speedometer error, revs per mile.
For driversGas Cost Calculator
Weekly, monthly, and annual fuel cost from your MPG, miles, and local gas price.
For driversAuto Loan Calculator
Monthly payment, total interest, and down-payment savings. Straight math, no dealer games.
For driversCoolant Type Lookup
Factory coolant spec, color, interval, and aftermarket cross-reference by make and year.
For driversIRS Mileage Deduction
Business, medical, and charity mileage at the current IRS standard rate. For 1099 filers.
For shop ownersLabor Quote Calculator
Build customer quotes from your labor rate, book hours, parts cost, and markup.