Connect power, torque and speed.
Solve one mechanical quantity from the other two. Explore a gear ratio without hiding its losses.
01 · Your inputs
Steady rotation with positive magnitudes only. This is mechanical shaft power, not electrical input power or a motor starting-torque calculation.
02 · Your result
Ready to calculate
Inputs stay in this tab. Nothing is uploaded or saved automatically.
Understand the calculation
Formula & assumptions
P (kW) = T (N·m) × ω / 1000
Gear output n = input n / ratio
η = entered efficiency (%) / 100
Gear output T = input T × ratio × η
Gear output P = input P × η
The ratio convention is always input speed divided by output speed. A ratio greater than one reduces speed; efficiency reduces delivered mechanical power. The calculated quantity is hidden from the inputs to avoid conflicting controls.
Sources & limitations
Motoring direction only. Regeneration, acceleration, service factors, peak loads, inertia and gearbox ratings are outside this simple relation. Values are not a safe motor or gearbox selection.
Alkoc Labs calculation engine v0.4.0. Educational and preliminary engineering use; independently verify inputs and results for consequential decisions. Display precision is not measurement uncertainty.
Keep your next step simple.
Need a different unit? Open the engineering unit converter. Have a measurement series to present? Open Graph Studio. Browse all tools →
JSON exports include inputs, units, results, assumptions and source links. They do not contain your files or browser history. Inputs are lost when this tab is closed or reloaded; export anything you need to keep.