Everyday health calculators for fitness, nutrition, and wellness tracking. All math runs locally in your browser; nothing is shared.
BMI is a screening tool based only on height and weight, so it overestimates body fat in muscular athletes and underestimates it in older adults who've lost muscle. Use it as a starting point, not a definitive measure.
The calculator uses the Mifflin-St Jeor equation, which estimates Basal Metabolic Rate from weight, height, age, and sex. It then multiplies by an activity factor (sedentary 1.2, light 1.375, moderate 1.55, active 1.725, very active 1.9) to estimate daily maintenance calories.
The European Food Safety Authority suggests 2.5L/day for men and 2.0L/day for women from all drinks and food. The calculator uses the common rule of 35ml per kg of body weight, adjusted upward for exercise.
No. The calculators are general informational tools. For diagnosis, treatment, or personalized health guidance, consult a licensed healthcare provider.