Free calculators to help you design, size, and build better robots. From motor selection to battery sizing to wire gauges — no guesswork.
Each calculator models real physics — not just textbook formulas. Enter your actual specs, get numbers you can build with.
Calculate ground speed from motor RPM and wheel diameter. Enable physics mode for DC motor torque-speed droop, rolling resistance, and gradient forces.
Open calculatorFind how long your robot runs on a charge — or size the battery for a target runtime. Supports Li-ion and LiFePO₄ with real depth-of-discharge and efficiency factors.
Open calculatorFind the right AWG gauge for your robot's power wiring. Input watts or amps, pick your safety derating, and get wire specs with headroom and resistance data.
Open calculatorTurtleneck Robotics started from a simple need — practical engineering tools that give real answers, not theoretical hand-waving. Every calculator here was born from actual robot builds.
Whether you're building your first wheeled robot or designing a field-ready autonomous platform, these tools help you make informed decisions about motors, batteries, and wiring before you spend money on parts.