Mechanical shaft output from electrical input calculator

Mechanical shaft output is calculated as P_input × η_total / 0.746. Use the stated system boundary and matching input units.

Units

\mathrm{HP}_{\text{shaft}} = \frac{P_{\text{input}} \times \eta_{\text{total}}}{0.746}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

Given

\mathrm{HP}_{\text{shaft}} = \frac{100 \times 0.8}{0.746} \approx 107.2

Symbol	Meaning	Unit
$\mathrm{HP}_{\text{shaft}}$	mechanical shaft output	hp
$P_{\text{input}}$	electrical input at the chosen boundary	kW
$\eta_{\text{total}}$	conversion efficiency within the boundary	—

Symbol	Meaning	Unit
$P_{\text{shaft}}$	mechanical shaft output	kW
$P_{\text{input}}$	electrical input at the chosen boundary	kW
$\eta_{\text{total}}$	conversion efficiency within the boundary	—

Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.