Modern BMI Visualizer | Health & Wellness Calculator

BMI Visualizer

Understand your body mass index with interactive visualization

22.5
Healthy Weight

Health Recommendations

  • Maintain balanced diet
  • Regular physical activity
  • Adequate sleep (7-9 hours)

Related Tools

Discover Your BMI & What It Means

Our BMI Calculator helps you estimate your Body Mass Index and weight status based on your age. Switch between Metric Units (used worldwide) or Other Units (US/metric conversion) to get started. Plus, we’ll also calculate your Ponderal Index—another way to gauge your body composition (more on that below).

What Is BMI?

BMI measures body fat using your height and weight. It’s a quick way to check if you’re in a healthy range: underweight, normal, overweight, or obese. While not perfect (it doesn’t account for muscle vs. fat), it’s a useful starting point to see if you might need lifestyle changes or a doctor’s advice.

BMI Categories for Adults (Age 20+)
Based on World Health Organization guidelines:

  • Severe Thinness: < 16

  • Moderate Thinness: 16 – 17

  • Mild Thinness: 17 – 18.5

  • Normal: 18.5 – 25

  • Overweight: 25 – 30

  • Obese Class I: 30 – 35

  • Obese Class II: 35 – 40

  • Obese Class III: > 40

For Kids & Teens (Ages 2–20)
CDC growth charts use percentiles instead of fixed ranges:

  • Underweight: <5%

  • Healthy Weight: 5% – 85%

  • At Risk of Overweight: 85% – 95%

  • Overweight: >95%

Why BMI Matters: Risks of Being Overweight

Carrying extra weight raises your risk for:

  • High blood pressure, heart disease, and stroke

  • Type 2 diabetes

  • Joint issues like osteoarthritis

  • Sleep apnea and breathing problems

  • Certain cancers (e.g., breast, colon)

  • Mental health struggles (depression, anxiety)

Don’t Ignore Being Underweight

Too low a BMI can lead to:

  • Weak bones (osteoporosis) and anemia

  • Weakened immunity

  • Hormonal imbalances (e.g., irregular periods)

  • Developmental delays in kids

BMI Isn’t Perfect—Here’s Why

  • Muscle vs. Fat: Athletes may show as “overweight” due to muscle mass.

  • Age/Gender: Older adults and women naturally have more body fat at the same BMI.

  • Kids’ Growth: Height and puberty stages affect BMI accuracy.

Still, BMI works well for 90–95% of people. Pair it with other health checks for the full picture.

How BMI Is Calculated

Examples for a 5’10”, 160-pound person:
Standard Units:
BMI = 703 × (160 lbs / 70² inches) = 23.0
Metric Units:
BMI = 72.57 kg / 1.778² meters = 23.0

What’s BMI Prime?

It’s your BMI divided by 25 (the “healthy” cutoff).

  • < 0.74: Underweight

  • 0.74–1: Normal

  • > 1: Overweight

  • > 1.2: Obese

Ponderal Index: BMI’s Cousin

This metric cubes height instead of squaring it, making it better for very tall/short people.
Example for the same 5’10”, 160-pound person:
Standard Units:
PI = 70 inches / ∛160 lbs = 12.9
Metric Units:
PI = 72.57 kg / 1.778Âł meters = 12.9

Remember: BMI is a screening tool, not a diagnosis. Always talk to a doctor for personalized health advice!