HP to Torque Calculator

Calculating the torque of an engine has never been easier with our HP to Torque Calculator. Whether you're an automotive enthusiast, an engineer, or just someone curious about engine performance, this tool helps you determine the torque output based on horsepower and engine speed (RPM). By simply entering your engine's horsepower and revolutions per minute, you can instantly calculate the torque in various units, such as pound-feet (lb·ft), Newton-meters (N·m), or kilogram-meters (kg·m).

What is Torque and Horsepower?

Torque and horsepower are two essential parameters that define an engine's performance.

• Torque measures the rotational force the engine produces, typically expressed in lb·ft or N·m. It's what gives a vehicle the ability to accelerate and tow heavy loads.
• Horsepower (HP) measures the engine's overall power output, considering the speed at which the torque is delivered.

These two parameters are linked by the formula:

Torque (lb·ft) = (Horsepower × 5252) ÷ RPM

Where:

• Torque = Rotational force in lb·ft
• Horsepower = Power of the engine
• RPM = Revolutions per minute
• 5252 = A conversion constant

How to Use the HP to Torque Calculator

Our HP to Torque Calculator is designed to be simple and intuitive. Follow these steps:

1. Input Horsepower (HP): Enter the engine’s horsepower rating.
2. Input Engine Speed (RPM): Provide the engine’s revolutions per minute.
3. Select Output Unit: Choose your preferred unit for torque (lb·ft, N·m, or kg·m).
4. View Results: Instantly see the calculated torque value and a detailed graph of torque and power vs. RPM.

Example Calculation:

• Horsepower = 150 HP
• RPM = 3000
• Unit = Newton-meters (N·m)

Result: Torque = (150 × 5252) ÷ 3000 = 263.97 N·m

Formula Details

The core calculation uses this formula:

Torque (lb·ft) = (Horsepower × 5252) ÷ RPM

To convert torque into other units:

• 1 lb·ft = 1.355818 N·m
• 1 lb·ft = 0.138255 kg·m

Why Choose Our Calculator?

Our HP to Torque Calculator is not just about numbers; it’s about understanding your engine’s performance. It provides:

• Accurate Results: Based on proven formulas.
• Customizable Units: Choose your preferred measurement system.
• Interactive Charts: Visualize torque and power curves over different RPM ranges.

Torque and Power Chart Example

For an engine with 200 HP at 5000 RPM, here’s how torque varies with RPM:

How Does It Work?

This calculator simplifies a complex engineering formula into an easy-to-use tool. You don’t need advanced math skills or technical expertise to find torque from HP and RPM. Just input the numbers, and the tool does the rest.

Final Verdict

Understanding torque is crucial for optimizing engine performance, whether for racing, towing, or general vehicle use. Our HP to Torque Calculator takes the guesswork out of these calculations, giving you reliable results in seconds. Whether you’re a professional or a hobbyist, this tool is your go-to solution for determining engine torque.

FAQs

How do you calculate torque from horsepower and RPM?

To calculate torque, use this formula:

Torque (lb·ft) = (Horsepower × 5252) ÷ RPM

Can I use this calculator for electric motors?

Yes, this calculator works for any rotating machine, including electric motors, as long as you know the horsepower and RPM.

Is 1 HP equal to torque?

No, horsepower and torque measure different things. However, they are related by RPM and the constant 5252.

What is the torque of a 5 HP motor?

The torque depends on the RPM. For example, at 1750 RPM:

Torque = (5 × 5252) ÷ 1750 = 15 lb·ft

How much torque is 600 horsepower?

At 3000 RPM:

Torque = (600 × 5252) ÷ 3000 = 1050.4 lb·ft