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
• \( m \) — Rider's weight in kilograms

Explanation: This ratio shows how much power a cyclist can generate for each kilogram of their body weight, which directly impacts climbing speed and acceleration.

3. Importance in Cycling

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

• Determining climbing performance (higher W/kg means faster ascents)
• Comparing riders of different sizes
• Setting training goals and tracking progress
• Race strategy and pacing decisions

4. Using the Calculator

Tips:

• Enter your average power output in watts (from a power meter)
• Enter your weight in kilograms (1 kg = 2.20462 lbs)
• For best results, use your current weight and recent power data

5. Frequently Asked Questions (FAQ)

Q1: What is a good W/kg ratio?
A: It varies by rider level:

• 2.5 W/kg: Recreational cyclist
• 3.0-3.5 W/kg: Amateur racer
• 4.0-5.0 W/kg: Elite amateur
• 5.0-6.0+ W/kg: Professional

Q2: How long can I sustain a given W/kg?
A: Duration depends on fitness:

• 5+ W/kg: 1-5 minutes (sprint/attack)
• 4 W/kg: 20-60 minutes (climb effort)
• 3 W/kg: Several hours (endurance pace)

Q3: Should I focus on increasing power or losing weight?
A: Both improve W/kg, but prioritize power first for beginners, weight for experienced riders near ideal racing weight.

Q4: Does this account for bike weight?
A: No, this is rider-only W/kg. For total system W/kg, include bike weight in the denominator.

Q5: How often should I measure my W/kg?
A: Regular testing (every 4-6 weeks) helps track progress, but daily fluctuations are normal due to fatigue, nutrition, etc.