1. What is Power-to-Weight Ratio?

The power-to-weight ratio (W/kg) measures a cyclist's power output relative to their body weight. It's a key metric in cycling performance, especially for climbing, as it determines how quickly a rider can ascend hills.

2. How the Calculator Works

The calculator uses the simple formula:

Where:

• \( W/kg \) — Watts per kilogram (performance metric)
• \( P \) — Power output in watts (W)
• \( m \) — Cyclist's mass in kilograms (kg)

Explanation: This ratio shows how much power a cyclist can generate for each kilogram of their body weight, which is crucial for climbing performance.

3. Importance in Cycling

Details: Power-to-weight ratio is particularly important for hill climbing. Higher ratios mean better climbing performance. Professional cyclists often have ratios of 6+ W/kg for short durations.

4. Using the Calculator

Tips: Enter your power output (from a power meter) in watts and your weight in kilograms. For accurate results, use recent measurements of both values.

5. Frequently Asked Questions (FAQ)

Q1: What is a good W/kg for amateur cyclists?
A: 2.5-3.5 W/kg for 1 hour is good for amateurs. 4+ W/kg is excellent.

Q2: How does age affect W/kg?
A: While age isn't directly in the formula, power output typically declines with age. However, maintaining weight can help preserve W/kg.

Q3: Why is W/kg more important than raw watts?
A: Because it accounts for the weight the power must move. A lighter rider needs fewer watts to achieve the same speed uphill.

Q4: How can I improve my W/kg?
A: Either increase power through training or decrease weight (safely) through nutrition, or both.

Q5: Is W/kg relevant for flat terrain?
A: Less so - raw power and aerodynamics become more important on flat terrain compared to climbs.