Welcome to BodyMeasureTool.com — your free, science-based solution for calculating key health metrics. Instantly discover your Body Fat %, BMI, Basal Metabolic Rate, Daily Calorie Needs, and Ideal Weight Range with our easy-to-use tool. Track your progress, make informed fitness decisions, and achieve your health goals with clear, accurate results. No signup required — just enter your measurements and get immediate insights.

Measure Your Body. Understand Your Health.

Health & Body Fat Calculator | Accurate Navy Method + BMI, BMR & Calories

Get accurate body fat percentage, BMI, BMR, daily calorie needs, and ideal weight estimates using science-based measurements. Our Navy method body fat calculator gives you precise results with simple inputs — no gym equipment required.

How It Works: Enter your measurements including height, weight, age, gender, and activity level. Our tool calculates your Body Fat %, BMI, BMR, Daily Calorie Needs, and Ideal Weight Range using the Navy method for maximum accuracy. Get results instantly — no registration required.

Body-Fat & Health Metrics Estimator (Embeddable)

Body-Fat & Health Metrics Estimator

Navy method when measurements are provided — otherwise a BMI-based estimate. Copyable, embeddable, and privacy-friendly (runs client-side).

Units Gender

Age Activity level

Height

If imperial: enter total inches (e.g., 5'9" = 69). Metric: cm.

Weight

Imperial: pounds. Metric: kilograms.

Neck circumference

Measure just below Adam's apple (men) / sloping part (women).

Waist circumference

At the navel / belly button (or narrowest point) — be consistent.

Hip circumference (women only)

Measure at widest part of hips / buttocks. Not required for men.

Results computed client-side — no data leaves your browser.

Daily Macro Calculator & Meal Targets

Quickly calculate daily calories and macro targets (protein, carbs, fat) with per-meal breakdowns. Science-based formulas, privacy friendly — runs in your browser.

Units Gender

Age Activity level

Height

Imperial: total inches (5'9" = 69). Metric: cm.

Weight

Imperial: pounds. Metric: kilograms.

Goal Macro preset

Meals per day

Protein default: 1.6 g/kg (mod active) — you can adjust ratios via "Custom". Results are estimates for guidance only.

Daily Targets

BMR, Calories & Macro breakdown

Client-side only • No data stored

BMR

—

kcal / day

Daily Calories

—

Protein

—

Carbs

—

Fats

—

Per-Meal Targets

—

Grams per meal (approx)

Calculated with Mifflin-St Jeor BMR. Use as guidance only.

How to use

Enter your age, height, weight and select activity level. Choose a goal (lose / maintain / gain). Pick a macro preset or enter custom percentages. Click Calculate to see daily calories, macro grams, and per-meal targets.

Use these daily macro targets as a guideline. For weight loss, aim for a moderate calorie deficit and keep protein high to preserve muscle. For muscle gain, increase calories slightly and prioritize protein and resistance training.

Disclaimer: The information provided on Body Measure Tool is for educational purposes only and should not be considered medical advice. Always consult with a qualified healthcare professional before making any changes to your diet, exercise, or health routine. Results from calculators and tools are estimates and may vary for each individual.