1. What is the Power Formula?

The power formula calculates horsepower from torque and RPM. It's essential for understanding bike performance characteristics, as power determines how quickly work can be done.

2. How Does the Calculator Work?

The calculator uses the power formula:

Where:

• \( Torque \) — Rotational force (lb-ft)
• \( RPM \) — Revolutions per minute
• 5252 — Conversion constant (derived from the relationship between hp and lb-ft)
• 1.3558 — Conversion factor for metric power

Explanation: The formula shows that power is directly proportional to both torque and RPM. The 5252 constant comes from the definition of horsepower.

3. Importance of Power Calculation

Details: Power calculation helps in understanding bike performance, comparing different bikes, and tuning for optimal power delivery across the RPM range.

4. Using the Calculator

Tips: Enter torque in lb-ft and RPM in rev/min. Both values must be positive numbers. The calculator will compute the power in horsepower.

5. Frequently Asked Questions (FAQ)

Q1: Why is 5252 RPM significant?
A: At 5252 RPM, torque and horsepower values are equal numerically (when using lb-ft and hp units).

Q2: What's the difference between torque and power?
A: Torque measures rotational force, while power measures how quickly work is done (torque × RPM).

Q3: How does this apply to bike performance?
A: Higher torque at low RPM gives better acceleration from stop, while high power at high RPM gives better top speed.

Q4: Can I use this for electric bikes?
A: Yes, the formula works for any rotating system, though electric motors often have different torque curves.

Q5: Why the 1.3558 multiplier?
A: This converts the result to metric horsepower (1 PS = 0.9863 hp) for international standards.