1. What is Power-to-Weight Ratio in Cycling?

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

Purpose: It's a key performance metric that helps cyclists evaluate their fitness level and compare performance across different body weights.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( \frac{P_w}{W} \) — Power-to-weight ratio (watts per kilogram)
• \( P_w \) — Power output (watts)
• \( W \) — Cyclist weight (kilograms)

Explanation: The power output in watts is divided by the cyclist's weight in kilograms to determine the ratio.

3. Importance of Power-to-Weight Ratio

Details: This ratio is especially important for climbing performance, as it directly affects how quickly a cyclist can ascend hills. Higher ratios indicate better climbing ability.

4. Using the Calculator

Tips: Enter your maximum sustainable power output (typically measured with a power meter) and your body weight. Both 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; Club cyclists: 3-4 W/kg; Elite cyclists: 4-6 W/kg; World-class climbers: 6+ W/kg.

Q2: Should I use my total weight or just body weight?
A: For personal fitness tracking, use body weight. For performance prediction (like climbing), include bike weight in your total weight.

Q3: How can I improve my ratio?
A: Either increase your power output through training or decrease your weight (while maintaining power) through nutrition.

Q4: Does this ratio matter for flat terrain?
A: Less important on flats where absolute power and aerodynamics play bigger roles, but still relevant for acceleration.

Q5: How long should I sustain the power measurement?
A: Common durations are 5s (sprint), 1m, 5m, and 20m (FTP). The ratio changes based on duration.