BMI & Body Roundness Index (BRI) calculator. Visceral fat risk, history & trend charts. Privacy-first: no ads, no tracking, no login
Users
3
−1 in 30 days
Rating
0.0 / 5
unchanged in 30 days
Ratings
0
0 in 30 days
Store rank
#328K
#258K among extensions
Version
1.0.1
updated 28 Jun 2026
Users
monthly, 5 months
Latest, 15 Oct 2026:3 usersMove the mouse over the chart for any month
Ratings count
monthly, 5 months
Latest, 15 Oct 2026:0 ratingsMove the mouse over the chart for any month
The Chrome Web Store rounds user counts down to the leading digit, so the user line moves in steps. The ratings count is exact and is the better signal of real adoption.
About BRI + BMI Calculator — Body Roundness Index
BRI + BMI Calculator is the only Chrome extension that calculates Body Roundness Index (BRI) — the modern, science-backed metric that predicts visceral fat and cardiometabolic risk better than BMI alone.
WHY BRI MATTERS
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BMI only uses height and weight. BRI adds waist circumference, which means it captures fat distribution around your organs — the kind that drives heart disease, diabetes, and metabolic syndrome. BRI is the measurement doctors are increasingly paying attention to.
WHAT YOU GET
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► Instant BRI + BMI calculation from the toolbar — no website visit needed
► Metric (cm / kg) and Imperial (in / lbs) support
► Color-coded 6-zone BRI gauge: Extremely Lean · Lean · Normal · Above Average · High · Very High
► Color-coded 4-zone BMI gauge: Underweight · Normal · Overweight · Obese
► "Understand your scores" link to the full BRI range guide
► How to measure your waist correctly — built right into the form
HISTORY & PROGRESS TRACKING
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► Save measurements with one tap
► View your last 20 entries with color-coded BRI dots
► BRI trend chart — see if your score is improving
► Delete any entry instantly
STATISTICS DASHBOARD
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► Average BRI over 7 days, 30 days, and all time
► BRI change over 30 days (green = improving, red = worsening)
► Dual BRI + BMI trend chart
► Your current BRI position on the full health gauge
DESIGN
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► Modern, clean interface — no clutter
► Light and dark mode (persists across sessions)
► 380 px popup — compact but readable
► All data stored locally on your device — nothing sent to any server
PRIVACY FIRST
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► Zero tracking, zero analytics, zero ads in the extension
► The only permission used is chrome.storage.local — to save your measurements on your device
► No account, no login, no email required
BACKED BY SCIENCE
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BRI (Body Roundness Index) was developed by Dr. Diana Thomas and colleagues and published in peer-reviewed journals. It has been validated across multiple large cohort studies as a stronger predictor of visceral adiposity and metabolic risk than BMI.
Full calculator, blog, and scientific references at bri-bmi-calculator.com
