1. What is Power-to-Weight Ratio?

The power-to-weight ratio (W/kg) is a key performance metric in cycling that measures a rider's power output relative to their body weight. It's particularly important for climbing performance and overall cycling efficiency.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• \( W/kg \) — Watts per kilogram (power-to-weight ratio)
• \( P \) — Power output in watts (W)
• \( m \) — Rider's weight in kilograms (kg)

Explanation: This ratio shows how many watts of power a rider can generate for each kilogram of their body weight.

3. Importance in Cycling

Details: Power-to-weight ratio is crucial for:

• Assessing climbing performance (more important than flat terrain)
• Comparing riders of different sizes
• Tracking fitness improvements
• Setting training zones and goals

4. Using the Calculator

Tips:

• Enter your average power output from a cycling session or test
• Use your current body weight in kilograms
• For best results, measure power with a power meter
• Values must be positive numbers

5. Frequently Asked Questions (FAQ)

Q1: What is a good W/kg ratio?
A: For recreational riders: 2-3 W/kg. Competitive amateurs: 3-4 W/kg. Pros: 5-6+ W/kg for extended periods.

Q2: How important is W/kg vs absolute power?
A: W/kg matters most for climbing. On flat terrain, absolute power and aerodynamics become more important.

Q3: Should I lose weight to improve my W/kg?
A: While losing weight improves the ratio, focus on increasing power through training first. Extreme weight loss can reduce power.

Q4: How do I measure my power output?
A: You need a cycling power meter, either in pedals, crank, hub, or smart trainer.

Q5: Does this apply to all cycling disciplines?
A: Most relevant for road cycling, especially hilly courses. Less critical for track cycling or time trials on flat courses.