Knowing your health numbers is the first step to real fitness. A BMI & Body Fat Calculator gives you a quick snapshot of where you stand — not just by weight, but by fat percentage too. While BMI (Body Mass Index) uses height and weight to classify you as underweight, normal, overweight, or obese, body fat percentage goes deeper, showing how much of your body is actually fat versus muscle.
Pair it with a calorie calculator to align your diet, a BMR calculator to measure daily energy burn, or a protein intake calculator to fuel workouts effectively. Fitness trackers can also use the ideal weight calculator to set realistic goals.
For anyone chasing health milestones — whether it’s weight loss, muscle gain, or just staying active — this combo tool is a powerful way to stay accountable. And if you’re juggling life numbers beyond health, free tools like the age calculator and time calculator keep the rest of your day just as balanced.
Check out aio-calculator.com — your all-in-one hub for BMI, body fat, calories, fitness, finance, math, and daily life calculators.
Measure body mass index, ideal weight, and body fat percentage
Body Mass Index (BMI) is a simple formula that uses your height and weight to classify your body into categories like underweight, healthy, overweight, or obese. It’s widely used by health professionals to quickly assess health risks.
Unlike BMI, body fat percentage tells you how much of your weight is actually fat compared to muscle, bones, and water. It’s a more detailed metric to track fitness levels and overall health.
Instant results with accurate formulas
Supports both metric (cm/kg) and imperial (in/lbs) units
Estimates ideal weight range
Easy to use, mobile-friendly, and fast
Enter your height and weight
Select your gender and age
Click “Calculate”
Get your BMI score and body fat percentage instantly
🟦 Underweight: Below 18.5
🟩 Normal Weight: 18.5 – 24.9
🟧 Overweight: 25 – 29.9
🟥 Obese: 30 or above
Q1: How do I calculate my BMI and body fat?
👉 Enter your height, weight, age, and gender into our BMI & Body Fat Calculator to get instant results.
Q2: What is the difference between BMI and body fat percentage?
👉 BMI measures weight relative to height, while body fat percentage measures actual fat mass in your body.
Q3: Is BMI enough to track health?
👉 BMI is a quick indicator, but body fat percentage provides a more accurate measure of fitness.