Free RC Car Tools
Quick calculators for setting up and maintaining your RC car — no signup, no ads blocking the numbers.
Gear Ratio & Top Speed Calculator
Find your final drive ratio, motor RPM, and estimated top speed from your pinion, spur, Kv, voltage, and tire size.
LiPo Battery Calculator
Get max discharge current, estimated charge time, and pack voltages from capacity, C-rating, and cell count.
Servo Torque & Speed Converter
Convert servo torque between kg·cm, oz·in, lb·in, and N·m, and turn a sec/60° speed spec into real steering transit time.
Scale Size Converter
Convert a real vehicle's length to its modeled size at any RC scale, or work out roughly how big the real thing is from a model's spec.