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 (performance metric)
• \( P \) — Power output in watts (W)
• \( m \) — Rider's mass in kilograms (kg)

Excel Compatibility: This formula can be directly entered into Excel as "=POWER/WEIGHT" where POWER and WEIGHT are cell references.

3. Importance in Cycling Performance

Details: Higher power-to-weight ratios allow cyclists to climb hills faster. Professional cyclists typically have ratios of 5-6 W/kg for extended efforts, while recreational riders might achieve 2-3 W/kg.

4. Using the Calculator

Tips: Enter your power output (from a power meter or cycling test) in watts and your weight in kilograms. For accurate comparisons, use normalized power from a 20-minute test.

5. Frequently Asked Questions (FAQ)

Q1: What's a good W/kg for amateur cyclists?
A: 2.5 W/kg is decent for recreational riders, 3.5 W/kg is good for competitive amateurs, and 4+ W/kg is excellent.

Q2: How can I improve my W/kg?
A: Either increase your power output through training or decrease your body weight (fat loss, not muscle loss).

Q3: Does this apply to flat terrain?
A: W/kg is most relevant for climbing. On flats, absolute power (watts) and aerodynamics matter more.

Q4: How accurate are power meter readings?
A: Quality power meters are ±1-2% accurate. Consistent measurement conditions are more important than absolute accuracy.

Q5: Should I use lb or kg for weight?
A: The international standard is kg. If your weight is in pounds, divide by 2.205 to convert to kg first.