The LRFIX Horsepower Calculator calculates horsepower using torque and RPM values to estimate engine performance.

### Horsepower Calculator

**Understand the Key Terms**

**Torque (lb-ft):**This is the rotational force applied by the engine or motor.**RPM (Revolutions Per Minute):**This measures the speed at which the engine or motor is spinning.

**Use the Horsepower Formula**

The formula to calculate horsepower is:

HP = (Torque (lb-ft) × RPM) / 5252

**Torque (lb-ft):**Rotational force in pound-feet.**RPM:**Revolutions per minute.**5252:**A constant used to convert the product of torque and RPM into horsepower.

**Perform the Calculation**

**Obtain the torque value**in pound-feet (lb-ft).**Obtain the RPM value**at which the torque is measured.**Multiply the torque by the RPM value.****Divide the result by 5252**to get the horsepower.

**Example Calculation**

If an engine produces 400 lb-ft of torque at 3000 RPM:

**Multiply torque by RPM:**400 lb-ft × 3000 RPM = 1,200,000**Divide by 5252:**1,200,000 / 5252 ≈ 228.8 HP

Therefore, the engine’s horsepower is approximately 228.8 HP.

**Interpreting the Results**

**Higher Torque at Lower RPM:**Indicates strong performance at lower speeds, ideal for tasks like towing.**Higher RPM with Moderate Torque:**Suggests high-speed performance, suitable for applications like racing.

Understanding the relationship between torque and RPM helps you evaluate engine performance and its suitability for different applications.