Ideal Race Weight Calculator


What is Ideal Race Weight Calculator?

The Ideal Race Weight Calculator is a tool that helps runners determine their optimal weight for racing based on their height. This calculator uses a formula that takes into account the relationship between body weight, height, and running performance.


The formula used in the Ideal Race Weight Calculator is:

IRW = 19 * H^2 / 703

where IRW is the ideal race weight in pounds and H is the runner’s height in inches.

For example, if a runner is 5 feet 10 inches tall (70 inches), their ideal race weight would be:

IRW = 19 * 70^2 / 703 = 147.1 lbs

This means that the runner’s optimal racing weight would be around 147 pounds.

How to Use the Calculator

To use the Ideal Race Weight Calculator, simply enter your height in inches into the input field provided and click the “Calculate” button. The calculator will then compute your ideal race weight for a 5K and an 800m race, based on the formula above.


What is an ideal racing weight?

An ideal racing weight is the weight at which a runner can perform at their best in a race. It is typically lower than their normal weight, as excess body weight can slow down a runner and make them less efficient.

Is the ideal race weight formula accurate for everyone?

No, the formula used in the Ideal Race Weight Calculator is a general guideline and may not be accurate for everyone. Other factors such as body composition, muscle mass, and running experience can also affect a runner’s ideal racing weight.

How can I achieve my ideal racing weight?

To achieve your ideal racing weight, it is important to maintain a healthy diet and exercise regularly. Gradual weight loss through a combination of healthy eating and exercise is recommended, rather than rapid weight loss through extreme dieting or other unhealthy methods.


The Ideal Race Weight Calculator is a useful tool for runners who want to optimize their racing performance. By using this calculator, runners can determine their optimal racing weight and work towards achieving it through a healthy lifestyle and regular exercise.


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