Log your weight, see it on a chart, and track your weekly trend towards your goal. Entries save automatically in your browser.

Loading the tool…

How to track your weight well

Why the weekly trend matters

Your weight can move by 1 to 2 kg from one day to the next because of water, salt, food and hormones. The 7-day average and average change a week show what’s really happening.

Example

Someone who starts at 83.8 kg, weighs in weekly and reaches 80.8 kg six weeks later has lost 3 kg, about 0.5 kg a week, which is within the NHS guide of 0.5 to 1 kg a week.

Your data stays on your device. Use Export CSV to back it up or open it in a spreadsheet.

Frequently asked questions

Is my weight data private?

Yes. Entries are saved only in your browser and never uploaded.

Can I use pounds?

Yes. Choose lb in the units box.

How often should I weigh myself?

Daily or a few times a week is fine if you focus on the weekly trend.

Will I lose my data if I clear my browser?

Yes, so export a CSV from time to time as a backup.

Last updated: