BMI Calculator & Weight Log

Your BMI is just one number, but what you do with it is what actually matters. This app helps you calculate it accurately, understand what it means for you specifically, and — if you want to — keep an eye on it over time instead of forgetting about it the moment you close the app.

CALCULATE, THE RIGHT WAY FOR YOU

Enter your height, weight, age, and gender, and get your BMI right away. You can switch between the WHO International standard and the WHO Asia-Pacific standard, which uses lower cutoffs that fit some populations better — most calculators only offer one, and it isn't always the right one for you. Metric, imperial, or stone: pick whichever units you actually think in.

KNOW YOUR IDEAL WEIGHT, NOT JUST YOUR CATEGORY

BMI alone doesn't tell the whole story. This app also works out your ideal weight range using four established formulas — Hamwi, Devine, Robinson, and Miller — explained in plain language so you understand where the numbers come from instead of just staring at a chart. For a fuller picture, it calculates your waist-to-height ratio too, a measurement that can catch things BMI alone misses.

SEE WHERE YOU'RE HEADED, NOT JUST WHERE YOU ARE

Every entry you save builds a history you can actually look back on: a trend chart you can filter by week, month, three months, or all time, tap any point to see the exact date and value, and a plain "up or down since last time" comparison. Set a goal weight and watch your progress toward it. Small milestones — your first entry, reaching the healthy range, your 10th or 50th log, hitting your goal — get a quiet moment of recognition instead of disappearing into a spreadsheet nobody reopens.

BUILT TO ACTUALLY STICK

A daily reminder, entirely optional, nudges you to log your weight before the habit fades. A home screen widget shows your latest BMI without even opening the app. Quick-log lets you record today's weight in two taps from wherever you are, pre-filled with whatever you logged last so you're rarely starting from zero.

MADE TO FEEL LIKE YOURS

Available in English, Arabic, Spanish, and French, with full right-to-left layout support where it's needed. Light and dark themes that follow your system setting automatically. Export your history to a CSV file whenever you want your own copy, or import one back in.

No account, no sign-up, no ads, nothing to configure before you can use it — open it and get your number.