1. What is Power-to-Weight Ratio?

Definition: Power-to-weight ratio (PWR) measures the power output per unit of weight, typically expressed in watts per kilogram (W/kg).

Purpose: It's a key metric in automotive and cycling performance, helping compare the efficiency of different vehicles or athletes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( PWR \) — Power-to-weight ratio (W/kg)
• \( P \) — Power output (watts)
• \( W \) — Weight (kilograms)

Explanation: The power output is divided by the total weight to determine how much power is available per kilogram of weight.

3. Importance of Power-to-Weight Ratio

Details: Higher PWR values indicate better performance potential, especially in climbing or acceleration scenarios where weight significantly impacts performance.

4. Using the Calculator

Tips: Enter the power in watts and weight in kilograms. Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a good power-to-weight ratio for cyclists?
A: For recreational cyclists, 2-3 W/kg is typical. Competitive cyclists often achieve 4-6 W/kg.

Q2: How does this apply to cars?
A: In automotive terms, PWR is often expressed as hp/ton. Higher values mean better acceleration.

Q3: Should I use gross or net weight?
A: For vehicles, use curb weight. For cycling, use total system weight (rider + bike + gear).

Q4: How can I improve my PWR?
A: Either increase power output through training or reduce weight (equipment or body weight).

Q5: What's the difference between PWR and torque-to-weight?
A: PWR relates to top speed potential, while torque-to-weight relates more to acceleration.