Convert Horsepower To Torque

Torque Formula:

\[ \text{Torque (lb-ft)} = \frac{\text{HP} \times 5252}{\text{RPM}} \]

Torque:

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What is the Horsepower to Torque Conversion?

The horsepower to torque conversion calculates the rotational force (torque) produced by an engine based on its horsepower and RPM. This relationship is fundamental in understanding engine performance characteristics.

2. How Does the Calculator Work?

The calculator uses the torque formula:

\[ \text{Torque (lb-ft)} = \frac{\text{HP} \times 5252}{\text{RPM}} \]

Where:

\( HP \) — Horsepower
\( RPM \) — Revolutions per minute
5252 — Conversion constant (derived from the relationship between horsepower, torque, and RPM)

Explanation: The constant 5252 comes from the fact that 1 horsepower is defined as 550 foot-pounds per second, and there are 60 seconds in a minute and 2π radians in a revolution.

3. Importance of Torque Calculation

Details: Torque measurement is crucial for understanding engine performance, vehicle acceleration, towing capacity, and overall mechanical efficiency. It helps engineers optimize engine design and helps consumers compare vehicle performance.

4. Using the Calculator

Tips: Enter horsepower and RPM values. Both values must be positive numbers. The calculator will compute the torque in pound-feet (lb-ft).

5. Frequently Asked Questions (FAQ)

Q1: Why is the constant 5252 used in the formula?
A: The constant 5252 comes from the conversion between different units of measurement: 1 HP = 550 ft-lb/s, and there are 60 seconds in a minute and 2π radians per revolution.

Q2: What's the difference between horsepower and torque?
A: Horsepower measures the rate of doing work (power), while torque measures rotational force. Horsepower = (Torque × RPM) / 5252.

Q3: At what RPM does horsepower equal torque?
A: Horsepower and torque are numerically equal at 5252 RPM, due to the mathematical relationship in the conversion formula.

Q4: Can this formula be used for electric motors?
A: Yes, the same relationship applies to electric motors, though their torque characteristics differ from internal combustion engines.

Q5: How does torque affect vehicle performance?
A: Higher torque generally means better acceleration and towing capability, particularly at lower RPMs.