RED-S Energy Availability Cutoff

Calculate energy availability in athletes and assess relative energy deficiency in sport (RED-S) risk using the energy availability threshold of 30 kcal/kg FFM/day.

Weight
Height
Clinical Guidance

BMI is a screening measure of body size, not a direct measure of body fat. The standard WHO categories are underweight (<18.5), normal (18.5–24.9), overweight (25–29.9), and obese (≥30).

BMI can overestimate body fat in athletes with high muscle mass and underestimate it in older adults with low muscle mass. Interpret it alongside waist circumference and clinical context rather than as a standalone diagnosis.

⚕ Clinical Disclaimer: These calculators are for educational and reference purposes only. Always verify results with qualified clinical judgment and current clinical guidelines. Do not use as a sole basis for medical decisions.
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How It Works

Calculate energy availability in athletes and assess relative energy deficiency in sport (RED-S) risk using the energy availability threshold of 30 kcal/kg FFM/day

Each component has a specific meaning:

  • Energy availability threshold of 30 kcal/kg FFM/day — The energy availability threshold of 30 kcal/kg ffm/day recorded for the scenario being assessed.

Note: Interpret the red-s energy availability result against the thresholds and context described above.

How to Use

Enter the energy availability threshold of 30 kcal/kg FFM/day for the scenario you are assessing. Calculate energy availability in athletes and assess relative energy deficiency in sport (RED-S) risk using the energy availability threshold of 30 kcal/kg FFM/day. Use the red-s energy availability result to inform your calculation.

Frequently Asked Questions