1. What is Watts Per Kilogram (W/kg)?

Definition: Watts per kilogram is a measurement of power-to-weight ratio, commonly used in cycling and other sports to measure athletic performance.

Purpose: It helps athletes and coaches evaluate performance efficiency by comparing power output relative to body weight.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( W/kg \) — Watts per kilogram (performance ratio)
• \( Watts \) — Power output in watts
• \( kg \) — Body weight in kilograms

Explanation: The power output in watts is divided by the athlete's weight in kilograms to determine the power-to-weight ratio.

3. Importance of Watts Per Kilogram

Details: This metric is particularly important in cycling and other weight-dependent sports where power relative to body weight significantly impacts performance, especially on climbs.

4. Using the Calculator

Tips: Enter your power output in watts and your weight in kilograms. Both values must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What is a good W/kg ratio?
A: For cyclists, 2.5 W/kg is decent for amateurs, 3.7-4.0 W/kg is good for competitive amateurs, and 5+ W/kg is professional level.

Q2: How do I measure my power output?
A: You need a power meter, which can be installed in pedals, crank, or rear wheel hub to measure watts produced while cycling.

Q3: Why use W/kg instead of just watts?
A: W/kg accounts for body weight, making performance comparisons between athletes of different sizes more meaningful.

Q4: Does this apply to other sports?
A: Yes, the concept is used in running, rowing, and any sport where power-to-weight ratio affects performance.

Q5: How can I improve my W/kg?
A: Either increase your power output through training or decrease your body weight (fat, not muscle) through nutrition.