Health Tools

Health calculators are useful when you want a quick estimate without booking an appointment. These tools cover BMI, basal metabolic rate, calorie deficits, hydration needs, and fertility window estimates — all based on published formulas and standard medical ranges. They're not a substitute for professional advice, but they give you a starting point for understanding your own numbers. Everything stays in your browser; no health data is stored or transmitted.

The BMI Calculator uses the standard WHO formula and classifies results into underweight, normal, overweight, and obese categories using the widely adopted thresholds (18.5, 25, 30). It accepts both metric and imperial inputs, which makes it accessible regardless of which measurement system you're used to. For a more complete metabolic picture, the BMR Katch-McArdle & TDEE Calculator estimates your basal metabolic rate using the Katch-McArdle formula (which accounts for lean body mass) and then multiplies by an activity factor to give your total daily energy expenditure — useful for setting calorie targets for weight loss or muscle gain.

The Macro Nutrient & Calorie Deficit Allocator takes your TDEE and target deficit, then breaks down recommended protein, carbohydrate, and fat intake in grams and percentages. This is more practical than a single calorie number because macronutrient distribution affects satiety, energy, and body composition differently.

For hydration, the Sweat-Rate & Fluid Loss Calculator estimates how much fluid you lose during exercise based on duration, intensity, and environmental conditions — useful for endurance athletes who need to plan intake during long runs or rides. The Ovulation & Fertility Window Calendar calculates estimated fertile days based on cycle length, using the standard clinical method of counting back 14 days from the next expected period.