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
• \( m \) — Body weight in kilograms

Explanation: The ratio shows how many watts of power you can produce for each kilogram of your body weight, which directly impacts your cycling performance, especially on climbs.

3. Importance in Cycling Performance

Details: Higher W/kg values indicate better climbing ability. Professional cyclists typically have ratios of 6+ W/kg for short efforts (5-20 minutes) and 5+ W/kg for longer climbs (30-60 minutes).

4. Using the Calculator

Tips: Enter your power output (from a power meter or cycling app) in watts and your body weight in kilograms. For accurate results, measure your weight in the morning before eating.

5. Frequently Asked Questions (FAQ)

Q1: What is a good W/kg for amateur cyclists?
A: For amateur cyclists, 3-4 W/kg for 20-minute efforts is considered good, while 4-5 W/kg is excellent.

Q2: Does this ratio matter on flat terrain?
A: While still relevant, absolute power (watts) becomes more important on flat terrain where aerodynamics plays a bigger role.

Q3: How can I improve my W/kg?
A: You can improve by increasing power (through training) or decreasing weight (through nutrition), or both.

Q4: Should I use my current weight or lean mass?
A: Use your total body weight as this reflects the actual load you're moving while cycling.

Q5: How does this compare to FTP?
A: Functional Threshold Power (FTP) is your maximum sustainable power for one hour, while W/kg puts that number in context of your body weight.