How to use the hoist motor power calculator
Find the mechanical and electrical power a hoist needs to lift a load at a steady speed. Enter load mass, lifting speed, motor efficiency in the fields above; the mechanical power, electrical input power are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “hoist motor size”, “crane motor power”, “lift power with efficiency”, “calculate hoist motor power”, “find mechanical power”.
Formula
Variables
- m — Load mass (kg)
- v — Lifting speed (m/s)
- eff — Motor efficiency (%)
Worked example
With load mass = 500 kg, lifting speed = 1.5 m/s, motor efficiency = 85 %, the calculator gives mechanical power ≈ 7.354987 kW; electrical input power ≈ 8.652926 kW.
Frequently asked questions
What is the hoist motor power calculator used for?
Find the mechanical and electrical power a hoist needs to lift a load at a steady speed. It helps with questions such as “hoist motor size”, “crane motor power”, “lift power with efficiency”.
What is the formula for the hoist motor power calculation?
Mechanical power (kW) = m × GRAV × v / 1000. Electrical input power (kW) = [Mechanical power] / (eff / 100). Here m is load mass (kg), v is lifting speed (m/s), eff is motor efficiency (%).
What inputs do I need for the hoist motor power calculator?
You need load mass in kg, lifting speed in m/s, motor efficiency in %. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the hoist motor power calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the hoist motor power result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.