Adult BMI screening reference
Enter centimetres or feet and inches to convert the adult BMI 18.5–24.9 reference into kilograms and pounds. Use the result as a screening range, not a personal ideal-weight target.
Check my height →BMI divides weight in kilograms by height in metres squared. Rearranging that equation gives the weight associated with a selected BMI at a given height.
The result is a population screening reference for adults. It can help start a conversation about health risk, but it does not directly measure body fat, muscle mass, fitness or metabolic health.
BMI uses only height and weight. A trained lifter can have a higher BMI because of muscle mass, while another person with the same BMI may have a different waist measurement and body composition. Review weight alongside strength, waist circumference, health markers and longer-term trends.
Weight naturally changes with hydration, food, glycogen and the time of measurement. If you are monitoring progress, compare measurements under similar conditions and focus on multi-week trends. MacroForge’s check-ins stay in your browser and can compare weight, estimated body fat and calorie targets over time.
MacroForge uses the conventional adult BMI 18.5–24.9 screening category described by the US Centers for Disease Control and Prevention and World Health Organization. These links provide broader interpretation and limitations.