Tools for people about to spend real money
No sign-up, no email wall. These run the published formulas and the government databases on your numbers, and they say plainly where a number stops being trustworthy.
Boat HIN decoder
Free HIN decoder. Paste a 12-character Hull Identification Number to read the builder code, hull serial, build date and model year, plus the three HIN
Car VIN decoder
Free VIN decoder: reads the factory record from the government vPIC database and validates the check digit, which is how you catch a re-stamped or fab
Sailboat ratios
Free sailboat calculator for hull speed, displacement/length, sail area/displacement, ballast ratio, capsize screening and Brewer motion comfort, with
Power to weight
Free calculator for pounds per horsepower, hp per ton, kW per tonne, and road speed per 1000 rpm from your gear ratio, final drive and tire size, with
Weight and balance
Free weight and balance calculator: enter each station's weight and arm and check total weight and CG against your aircraft's own envelope. Arithmetic
Maintenance intervals
Free service schedule generator for Yanmar, Ford Lehman, Atomic 4, Perkins, Volvo Penta MD, Westerbeke and classic car engines, with the reason behind
What should I pay
Free offer calculator. Enter the asking price and what your inspection found, and it works out an offer plus the first-year costs of survey, insurance