On this page
How to use it
- Enter your height once. The tracker remembers it, so next time you only need your weight.
- Add your weight and the date, then press Add measurement.
- Watch the trend. After two entries, a chart shows your BMI over time, with the healthy range shaded.
- Export to a CSV file to keep a copy or open it in Excel or Google Sheets.
How often to measure
Weight goes up and down by a few pounds from day to day with water, food and salt. Once a week, at the same time of day, is enough to see a real trend. Weigh yourself the same way each time. How to weigh yourself accurately.
About your privacy
Measurements are stored in your browser's local storage on this device. They're never sent to our server. That also means:
- They won't appear on your other devices.
- Clearing your browser data deletes them, so export a copy now and then.
- Anyone using this browser on this device can see them.
Frequently asked questions
Can I track a child's BMI here?
Use the kids and teens calculator, which saves measurements on a growth chart with percentiles.
Can I keep my tracker in a spreadsheet instead?
Yes. Export your data, or start from the template in BMI in Excel.
Sources
Kept up to dateLast updated October 9, 2026
Private by designYour numbers never leave your device
This page is for education and is not medical advice. Talk with a healthcare professional about your weight and health.
