1. What is a Power-to-Weight Ratio Calculator?

Definition: This calculator determines a cyclist's power-to-weight ratio (PWR), which measures how many watts of power they can produce per kilogram of body weight.

Purpose: It helps cyclists evaluate their performance potential, especially for climbing, and compare their fitness level with others.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The power output is divided by the rider's weight to determine how much power they generate per kilogram of body mass.

3. Importance of Power-to-Weight Ratio

Details: PWR is crucial in cycling because it directly affects climbing performance. Higher ratios mean better climbing ability.

4. Using the Calculator

Tips: Enter your sustained power output in watts (typically from a 20-minute test) and your weight in kilograms. All values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a good power-to-weight ratio?
A: For recreational cyclists: 2-3 w/kg. Competitive amateurs: 3-4 w/kg. Pros: 5-7 w/kg (sprinters may be lower).

Q2: How do I measure my power output?
A: Use a power meter on your bike or a smart trainer with power measurement capabilities.

Q3: Should I use my total weight or just body weight?
A: For most purposes, use just your body weight. For complete bike performance, some use total system weight (rider + bike).

Q4: How can I improve my PWR?
A: Either increase your power output through training or decrease your weight (safely) through diet and fitness.

Q5: Does this calculator work for other sports?
A: While PWR is most relevant to cycling, the concept applies to any power-based sport where weight affects performance.