Last updated: March 2026
What Is the Weight Tracker?
The Weight Tracker is a free browser-based tool for logging your daily weight and visualizing progress over time. It displays a trend chart with a 7-day moving average, calculates your weekly loss rate, and projects when you'll reach your goal weight — all without any signup or app installation.
Research consistently shows that daily self-weighing is one of the strongest predictors of successful weight management. A meta-analysis in the International Journal of Behavioral Nutrition and Physical Activity found that frequent weighing is associated with greater weight loss and less weight regain over time.
Unlike paid apps that lock features behind subscriptions, this tracker gives you everything you need for free: daily logging with notes, a visual trend chart, comprehensive stats, BMI tracking, and full data portability through CSV export and import.
How to Track Your Weight Effectively
Be consistent with timing. Weigh yourself at the same time each day — ideally first thing in the morning, after using the bathroom, before eating or drinking. This minimizes the impact of food, water, and activity on your readings.
Focus on the trend, not individual days. Your body weight can fluctuate 1-4 pounds daily from water retention, sodium intake, carbohydrate storage, and digestive contents. The 7-day moving average on the chart filters this noise and reveals your true direction.
Use notes for context. Adding notes about meals, exercise, sleep, or stress helps you understand spikes and drops. Over time, you'll learn which factors affect your scale weight most.
Export your data regularly. Click "Download CSV" weekly to maintain a permanent backup. The CSV opens in Excel or Google Sheets and can be imported back into the tracker at any time.
Frequently Asked Questions
Should I weigh myself every day?
Daily weighing gives the most accurate trend data. Weight fluctuates 1-4 lbs day-to-day from water, food, and sodium — the 7-day moving average on the chart filters this noise and shows your real trajectory.
Why does my weight go up even when I'm dieting?
Water retention from sodium, carbs, exercise soreness, and hormonal cycles can spike the scale 1-3 lbs temporarily. Look at the trend line, not individual days. A consistent downward trend over 2+ weeks means you're losing fat.
What's a healthy rate of weight loss?
1-2 pounds per week is considered safe and sustainable by the CDC. The tracker shows your weekly average rate so you can monitor whether your pace is in a healthy range.
How do I save my weight data?
Your data is saved automatically in your browser's local storage and persists between visits. For a permanent backup, click "Download CSV" to export all your logged data as a spreadsheet file. Use "Import CSV" to restore it on any device.
What is the trend line on the chart?
The trend line is a 7-day moving average of your logged weights. It smooths out daily fluctuations to show your actual weight trajectory. This is the line that matters — individual data points bounce around due to water weight and other factors.