Torque Power Calculator
What is a Torque Power Calculator?
A Torque Power Calculator is a tool used to compute the relationship between torque (T), power (P), and rotational speed (N) in mechanical systems. It helps engineers, mechanics, and designers determine the power output of rotating machinery such as motors, engines, and turbines.
The key formulas are:
For Power in Watts (P in W, T in Nm, N in RPM):
For Power in Horsepower (HP, T in lb-ft, N in RPM):
Where:
- P = Power (Watts or HP)
- T = Torque (Newton-meters (Nm) or pound-feet (lb-ft))
- N = Rotational speed (Revolutions per minute, RPM)
Why Use a Torque Power Calculator?
This calculator is essential for:
✅ Motor and engine design – Ensuring proper power and efficiency
✅ Machine performance analysis – Checking if a motor provides enough torque
✅ Gear and transmission selection – Matching power needs in mechanical systems
✅ Automotive and aerospace applications – Calculating power from torque in vehicles
✅ Industrial machinery – Optimizing performance in pumps, conveyors, and turbines
How to Use the Calculator?
- Input two known values (e.g., torque and RPM)
- Apply the formula to compute the third value
- Use appropriate units (Nm, lb-ft, Watts, HP, RPM)
Example 1: Calculating Power from Torque
If an electric motor generates 50 Nm of torque at 1500 RPM, power is:
Example 2: Finding Torque from Power
If a motor delivers 10 HP at 2000 RPM, torque is:
When is a Torque Power Calculator Needed?
🔹 Motor and generator efficiency testing
🔹 Designing automotive drivetrains (engines, transmissions, differentials)
🔹 Sizing industrial machines (conveyors, pumps, turbines)
🔹 Power and torque optimization in robotics and automation