RC Tools & Calculators
Free calculators for RC airplanes, cars, and trucks — built to give quick, practical answers without the guesswork. Pick a tool below to get started.
General
Charger Wattage Calculator
Find out how much charger wattage you actually need, and roughly how long a charge will take, based on pack size, cell count, and charge current.
Open CalculatorRC Unit Conversion Hub
Quick conversions for the units that come up most in RC — weight, length, temperature, and speed — in one simple tool.
Open CalculatorRC Airplane
Aircraft CG Calculator
Find your model’s true center of gravity using the three-point weighing method — enter arm and weight for each support point and get an exact CG location.
Open CalculatorBattery Flight Time Estimator
Estimate how long a LiPo pack will last in the air based on capacity, average current draw, and a safe usable-capacity margin.
Open CalculatorRC Car/Truck
Corner Weight Calculator
Enter the weight at each corner of your car or truck to see your front/rear split, left/right split, cross weight, and each corner’s share of total weight.
Open CalculatorNitro Fuel Run Time Calculator
For 1/8 and 1/10 nitro racing — work out your burn rate, full-tank run time, and how many tanks you’ll need for a main.
Open CalculatorPinion/Spur Gear Ratio Calculator
Calculate external gear ratio, total gear ratio, and rollout from your pinion and spur tooth counts — with an optional field for internal/final drive ratio.
Open CalculatorShock Oil Weight ↔ cSt Converter
Convert between shock/diff oil “weight” (wt) and centistokes (cSt), with a full reference chart for quick lookups.
Open Calculator