Automotive calculators

Enter the trailer height, ramp length, loading direction, and the lowest points on the vehicle. The calculator compares the ramp angle with approach and breakover limits, then solves the minimum straight ramp length.

Enter the tube size, joint-center length, U-joint class, tire diameter, axle ratio, and planned road speed. The calculator estimates critical shaft speed, the safe RPM limit, road-speed margin, and whether a larger tube could meet the target.

Enter the vehicle geometry, brake hardware, target deceleration, and driver effort to estimate ideal bores, nearest standard master cylinders, balance-bar offset, and pedal force.

Compare the economic cost of keeping your current car with buying a replacement over the same period. The result includes the value you give up by keeping either vehicle, operating costs, and the annual mileage where the answer could change.

Enter the tire, axle, and transmission drive-gear details to calculate a mechanical speedometer driven gear. The comparison shows why the nearest tooth count is not always the gear with the smallest reading error.

Enter corner weights, unsprung weight, spring rates, motion ratios, and tire rates to compare front and rear ride frequency. Set target frequencies to see the spring rates needed to reach them.

Enter the engine, boost target, pressure losses, inlet temperature, and efficiency assumptions to generate the compressor-map points across an RPM sweep.

Enter an unhitched tow-vehicle ticket, a coupled ticket with the spring bars loose, and a coupled ticket with the bars engaged. The calculator estimates actual tongue weight, front axle load restoration, where the load moved, and whether the tested setup is above or below the selected front-axle target.