What BMI and calorie calculators can and cannot tell you
Understand BMI units, population limits and why calorie equations are estimates rather than personal treatment or nutrition plans.
Check the units behind BMI
Adult BMI is weight in kilograms divided by height in metres squared. Using centimetres directly in the denominator produces a dramatically wrong answer. For example, 70 kg and 1.75 m gives about 22.9 kg/m². BMI is a screening measure, not a direct measurement of body fat or a diagnosis. The same number may mean different things depending on age, body composition and clinical context.
Do not apply an adult interpretation to everyone
Children and teenagers require age- and sex-specific interpretation. Pregnancy, muscular build, illness and other circumstances also make a single adult BMI number incomplete. CDC explains both the use and limitations of BMI. If a result concerns you, discuss it with a qualified clinician who can consider measurements and history rather than relying on a website category.
Calorie equations are estimates
A calorie calculator usually estimates resting energy needs and then applies an activity assumption. Errors in the activity description can matter more than a small change in a formula. A number generated from height, weight and age is not a precise measure of your actual energy expenditure, and it is not a prescription for weight change. Medical conditions and individual circumstances need professional guidance.
Use arithmetic without overinterpreting it
Daily Desk currently supplies general unit and percentage tools, not a personalized health calculator. You can check units and understand a formula here, but should not use this page to set a restrictive diet or evaluate a child’s health. Keep health information out of unrelated advertising or public forms. A useful calculation begins by defining its assumptions and ends by acknowledging what the number cannot establish.