1. What is Torque and Horsepower Difference?

Definition: Torque is a measure of rotational force, while horsepower is a measure of power (work done over time).

Purpose: This calculator helps convert between torque and horsepower, showing their relationship at different RPMs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( HP \) — Horsepower
• \( T \) — Torque (lb-ft)
• \( RPM \) — Revolutions per minute
• 5252 — Conversion constant (derived from units of measurement)

Key Fact: At 5252 RPM, torque and horsepower values are always equal numerically.

3. Importance of Understanding the Difference

Details: Torque determines initial pulling power, while horsepower determines how long you can sustain that power. Both are crucial for engine performance analysis.

4. Using the Calculator

Tips: Enter torque in lb-ft and engine speed in RPM. The calculator will show the equivalent horsepower at that RPM.

5. Frequently Asked Questions (FAQ)

Q1: Why 5252 in the formula?
A: This constant comes from the conversion between foot-pounds per minute and horsepower (1 HP = 33,000 ft-lb/min).

Q2: Which is more important - torque or horsepower?
A: It depends on application. Torque matters for low-speed pulling power, horsepower for high-speed performance.

Q3: Why do torque and horsepower curves cross at 5252 RPM?
A: This is mathematically inevitable from the formula - when RPM=5252, HP equals torque numerically.

Q4: Can I calculate torque from horsepower?
A: Yes, rearrange the formula: \( T = \frac{HP \times 5252}{RPM} \)

Q5: What's a typical torque value for cars?
A: Passenger cars typically have 100-300 lb-ft, while trucks may have 400-1000+ lb-ft.