CalculioHubCalculioHub

Health, Fitness & Wellness

Free BMI Calculator for Adult Men and Women

BMI = (weight lbs × 703) ÷ height in².

Calculate adult BMI from height and weight with WHO category bands. Estimates only—not a diagnosis or prescription.

Remember · Share

Inputs save on this device only. Share a link to reopen your exact numbers.

Inputs

80400
4884

Smart analysis

Recommendations

Tailored to your live inputs and result—guidance only, not professional advice.

  • Interpret

    Treat this as a planning estimate

    Primary result: BMI = 25.1. Re-run with optimistic and pessimistic inputs to understand the range—not just a single point.

Scenario studio

Compare A vs B

Capture two sets of inputs on this device, then see which outcome wins. Share either scenario with a link.

Scenario A

Adjust inputs, then capture this slot.

Scenario B

Adjust inputs, then capture this slot.

Come back later

Health check-in history

Private on this device only. Not a medical diagnosis or treatment advice — talk to a qualified clinician for health decisions.

No snapshots yet — save one to track change over time.

Plain-English guide

Terms & how it works

Confused by a field? Read the short definitions here while you use the tool.

  • Weight (lbs)

    The “Weight (lbs)” value used in this tool’s formula. Adjust it to see results update live.

  • Height (in)

    The “Height (in)” value used in this tool’s formula. Adjust it to see results update live.

How this calculator works

Calculate adult BMI from height and weight with WHO category bands. Estimates only—not a diagnosis or prescription. BMI = (weight lbs × 703) ÷ height in². Example: 170 lb at 5'9" (69 in) → BMI ≈ 25.1 (overweight band).

BMI = (weight lbs × 703) ÷ height in².

Example: 170 lb at 5'9" (69 in) → BMI ≈ 25.1 (overweight band).

When to use this BMI

Common use cases

  • Calculate adult BMI from height and weight with WHO category bands.
  • Sanity-check with this case: 170 lb at 5'9" (69 in) → BMI ≈ 25.1 (overweight band).
  • The relationship is: BMI = (weight lbs × 703) ÷ height in².

Localized examples

  • Health, Fitness & Wellness: the example on this page uses the same formula as the widget.

What you get

  • Fields: Weight (lbs), Height (in)
  • BMI = (weight lbs × 703) ÷ height in².
  • Example on the page: 170 lb at 5'9" (69 in) → BMI ≈ 25.1 (overweight band).

How to Calculate BMI Step-by-Step

  1. 1Enter Weight (lbs), Height (in). Use the values you have, not a catalog average, unless that is all you know.
  2. 2BMI = (weight lbs × 703) ÷ height in².
  3. 3Worked case: 170 lb at 5'9" (69 in) → BMI ≈ 25.1 (overweight band).
  4. 4If this number would change a drug, a diet, or a return-to-play call, take it to a clinician. The page never examined you.

Governing formula

BMI = (weight lbs × 703) ÷ height in².

170 lb at 5'9" (69 in) → BMI ≈ 25.1 (overweight band).

Example: set Weight (lbs) = 170, Height (in) = 69, then read the result.

Variable definitions

  • weightLbs

    Weight (lbs)

    The “Weight (lbs)” field. Default 170; typical range 80–400.

  • heightIn

    Height (in)

    The “Height (in)” field. Default 69; typical range 48–84.

  • The formula (BMI = (weight lbs × 703) ÷ height in².) does not see labs, medications, sleep, or injury history. A clinician does.
  • Nothing here is uploaded for the calculation itself.

Frequently Asked Questions

BMI = (weight lbs × 703) ÷ height in².

Related calculators

Health, Fitness & Wellness

Get a note when we add a planner

Occasional email when something new is worth opening. We never share your address. Unsubscribe anytime.

Discover & search

Explore More Tools

Related tools in Health, Fitness & Wellness — strengthening topical internal links.

Same category · 3 tools

Browse all →

Children's BMI Calculator

Health, Fitness & Wellness

Estimate a child's BMI percentile from age, sex, height, and weight.

Body Fat Percentage Calculator

Health, Fitness & Wellness

Estimate body fat % with neck, waist, hip, and height tape measurements.

Army Body Fat Calculator

Health, Fitness & Wellness

Check body fat against approximate Army tape-test screening limits.

Community

Reviews & Ratings

See what others think about this tool, then leave your own rating to help improve CalculioHub.

4.8

out of 5.0

4 reviews

Leave a review

Your rating

Aisha K.

Mar 12, 2026

Clean layout and the results update instantly. Exactly what I needed for a quick planning check.

Daniel R.

Feb 28, 2026

Very usable on mobile. Would love a save/export option later, but the math feels solid.

Priya S.

Feb 3, 2026

The FAQ section answered my questions before I even had to search. Smooth dark mode too.

Marcus L.

Jan 19, 2026

Simple inputs, clear outputs. This replaced three bookmarks I used to juggle.

Improve this tool

Suggestion Box

Share an idea, report a bug, or send general feedback for BMI Calculator. Your input helps shape what we build next.