Torque to horsepower Calculator

Form

Nm
rmp

Results

Horsepower

0

Table of Contents

1

What is Torque to hp?

Mechanical power combines torque with rotational speed.

2

How to Use This Calculator

  1. Enter or select Torque, Speed.
  2. Check the unit beside each measurement. For a percentage or rate, use the scale and time period stated in the form.
  3. Choose Calculate, then compare the output with the formula and example below. If you change a value or option, calculate again to update the result.
3

Formula Used

Power(W)=torque(N·m) × RPM/9.5488; mechanical horsepower=power(W)/745.70.
4

Variables Explained

InputWhat it means
TorqueUse the measured or stated value for this item, with the unit or category shown beside the field.
SpeedDistance traveled per unit time; choose the unit before using the numerical value.
5

Worked Example

A torque of 100 N·m at 3,000 RPM gives about 31,417.56 W, or 42.13 mechanical hp.

6

Why Use This Calculator?

Use the result to put measurements on a common basis before comparing them or estimating quantities. The original measurement precision still limits the precision of the answer.

7

Common Mistakes

    • The form uses newton-meters and revolutions per minute. Foot-pounds and metric horsepower use different conversion factors.
8

Frequently Asked Questions

When should I round a measurement?

Carry the measured values and conversion factors through the calculation first. Round the final result to a precision justified by the original measurements.

Why can a supplier’s quantity differ?

Measurement conventions, nominal sizes, density assumptions and purchase rounding can change a practical quantity. Compare the units and assumptions before comparing the numbers.

9

Sources & References

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