What does BMI Calculator do?

Body mass index and optional body fat percentage. Output is an indicative estimate for 2026—not legal, tax, or financial advice. Verify with official rules and a professional if needed.

Do I need to sign up?

No account is required. The calculator runs in your browser for quick estimates; always double-check for contracts or tax filings in 2026.

How accurate is the result?

It depends on your inputs and the model’s assumptions. Use it for planning and what-if analysis; for binding decisions, confirm numbers from primary sources and advisers.

Is my data stored on the server?

Results are not meant to be posted publicly; some tools may use local device storage (see the tool’s on-page copy).

BMI Calculator

Body mass index

Updated for 2026

Formulas verified

No registration

100% free

BMI Calculator

Body mass index (weight / height²)

Weight (kg)

Height (cm)

Why trust us?

100% free calculations
Current tax rates
Instant results
No registration

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