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, where gravity plays a significant role.

2. How the Calculator Works

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 mass in kilograms (kg)

Explanation: This ratio shows how many watts of power a rider can produce for each kilogram of body weight. Higher values indicate better climbing ability.

3. Importance in Cycling

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

• Assessing climbing performance
• Comparing riders of different sizes
• Tracking fitness improvements
• Setting training zones

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 calibrated power meter

5. Frequently Asked Questions (FAQ)

Q1: What's a good W/kg for amateur cyclists?
A: 2.5 W/kg is decent, 3.5 W/kg is good, and 4.5+ W/kg is excellent for amateur riders.

Q2: How does W/kg affect climbing speed?
A: On a 7% grade, each additional 0.5 W/kg typically increases speed by about 1 km/h.

Q3: Should I focus on increasing power or losing weight?
A: Both help, but overweight riders often benefit more from weight loss, while lean riders should focus on power gains.

Q4: How do pros compare?
A: World-class climbers can sustain 6+ W/kg for 20+ minutes during races.

Q5: Does bike weight matter?
A: Yes, but it's typically less significant than rider weight. The calculator uses rider-only weight for simplicity.