Health & Fitness Calculators

BMI, daily calorie & TDEE macro needs, body fat %, running pace, pregnancy due date, and sleep cycle calculators.

Health & Fitness (6 Calculators)

Body Composition & Clinical Screening

BMI Calculator (Body Mass Index)

Compute BMI, Ponderal Index, and healthy weight range with both global WHO and Asia-Pacific/Indian clinical screening thresholds.

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Nutrition & Energy Expenditure

Calorie Needs & TDEE Calculator

Estimate resting BMR and daily maintenance calories (TDEE) using the Mifflin-St Jeor equation, plus daily protein, carb, and fat targets.

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Anthropometry & Body Composition

Body Fat (US Navy), Lean Body Mass & Body Surface Area Calculator

Compute US Navy Body Fat %, fat-free Lean Body Mass (kg), Mosteller BSA (m²), and Waist-to-Hip Ratio.

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Endurance & Strength Training

Running Pace, One-Rep Max (1RM), Target Heart Rate & Calories Burned Calculator

Compute running pace & race splits, Epley/Brzycki 1RM strength max, Karvonen HR zones, and METs energy burn.

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Maternal Health & Cycle Planning

Pregnancy Due Date, Conception, Weight Gain & Ovulation Calculator

Estimate obstetric due date (40 weeks), ovulation/conception date, menstrual cycle interval, and IOM pregnancy weight gain range.

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Sleep Science & Clinical Equations

Sleep Cycle Planner & Clinical eGFR (2021 CKD-EPI) Reference Calculator

Plan 5-cycle (7.5 hr) and 6-cycle (9.0 hr) bedtimes and compute 2021 CKD-EPI eGFR from serum creatinine.

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Health & Fitness Editorial Guide

Complete Guide to Health & Fitness Calculators, Formulas & Visual Charts

Our Health & Fitness hub brings together 6 interactive calculators covering Body Composition & Clinical Screening, Nutrition & Energy Expenditure, Anthropometry & Body Composition, Endurance & Strength Training, Maternal Health & Cycle Planning, Sleep Science & Clinical Equations. BMI, daily calorie & TDEE macro needs, body fat %, running pace, pregnancy due date, and sleep cycle calculators. Every tool runs locally in your browser for instant speed and complete privacy.

Popular calculators in this category include BMI Calculator (Body Mass Index), Calorie Needs & TDEE Calculator, Body Fat (US Navy), Lean Body Mass & Body Surface Area Calculator, Running Pace, One-Rep Max (1RM), Target Heart Rate & Calories Burned Calculator, Pregnancy Due Date, Conception, Weight Gain & Ovulation Calculator. Each calculator pairs textbook mathematical notation with three custom domain-specific SVG visualizations, a step-by-step worked example, and side-by-side scenario comparison so you can plan and verify every calculation clearly.