Weight loss tracker
Log a morning weigh-in in five seconds. The yellow line is your 7-day average, the number that actually tells you whether it’s working.
Today’s weigh-in
Trend
Loading your saved weigh-ins…
Goal weight
How to read your weight trend
Ignore the dots, watch the line. A single weigh-in mixes fat, muscle, water, glycogen and whatever is still in your gut, and the last three can move a kilo overnight. The 7-day average smooths that noise out, so a steady slope over two to four weeks is the real signal.
- Losing 0.5–1% of body weight a week is the range most coaches and the NHS weight-loss plan aim for.
- Flat for three weeks while your waist shrinks? That is often body recomposition. Check your measurements and progress photos before changing anything.
- Sudden jump after a salty meal or a big training day? It’s water. See why weight fluctuates and play with the simulator.
Want to know what percentage you have lost so far? Use the weight loss percentage calculator, or ask the AI check-in for a plain-English read of your log.
Questions people ask
Is this weight loss tracker really free and private?
Yes. There is no account and nothing is uploaded. Every weigh-in is saved in your browser’s local storage on this device, and you can export a backup file or wipe it from the Privacy page.
What is a 7-day moving average and why use it?
For each day it averages every weigh-in from that day and the six days before it. Daily weight can swing 1–2 kg from water, salt, carbohydrate and digestion alone, so the average shows the direction of travel far more honestly than any single morning.
How often should I weigh myself?
Daily weighing gives the moving average the most data and, in studies such as Steinberg et al. (2015, Journal of the Academy of Nutrition and Dietetics), was linked to more weight loss without harming mood. If daily feels stressful, three or more mornings a week still gives a usable trend.
What is a healthy rate of weight loss?
The CDC and NHS both suggest around 0.5–1 kg (1–2 lb) a week for most people. A common rule of thumb is 0.5–1% of body weight per week; faster than that tends to cost muscle and is hard to sustain.
When is the best time to weigh in?
First thing in the morning, after the toilet and before food or drink, wearing the same thing (or nothing). Keep the scale on a hard, flat floor in the same spot.