Health category
Health Calculators
Free tools for BMI, body fat, calories, macros, ideal weight, running pace, heart-rate zones, and pregnancy date estimates. Fast results with clear assumptions.
Calorie Calculator
Estimate daily calorie needs for weight loss, maintenance, or gain.
Body Fat Calculator
Estimate body fat percentage, fat mass, and lean mass from measurements.
Macro Calculator
Estimate calorie, protein, carbohydrate, fat, and fiber targets.
Ideal Weight Calculator
Compare four ideal-weight formulas with a healthy BMI range.
Pace Calculator
Calculate running pace, speed, and projected race finish times.
Target Heart Rate Calculator
Calculate five training zones using maximum rate and heart-rate reserve.
Pregnancy Due Date Calculator
Estimate due date and trimester milestones from LMP, conception, or IVF.
BMI Calculator
Calculate body mass index from height and weight.
About these health calculators
Health calculators provide quick screening estimates based on standard formulas. The BMI calculator uses weight and height to calculate body mass index and shows the corresponding weight category. It is a reference tool, not a medical diagnosis.
BMI is widely used as a population-level screening measure. For individuals, it is one data point among many. Athletes, children, pregnant people, older adults, and people with specific medical conditions may need more personalized assessments from a qualified health professional.
The body fat calculator complements BMI by estimating fat mass and lean mass from circumference measurements. Calorie and macro tools support nutrition planning, while ideal-weight, pace, heart-rate-zone, and pregnancy-date tools compare formulas and expose assumptions. These tools are intended for trends and general education, not diagnosis.
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