The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
Free tracker included with every download this week
Weight Tracker Chart — How to Monitor Your Health Progress
A weight tracker chart is a simple but effective way to visualise your weight management journey and stay motivated towards your health goals. Whether you're working towards a healthier weight following NHS guidance or using prescription weight management support, tracking your progress helps you spot patterns, celebrate milestones, and stay accountable. This guide explains what to track, how to set it up, and how to get the most from your weight tracking routine.
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Calculate Your BMI Instantly
Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
What Should You Record on Your Weight Tracker Chart?
A comprehensive weight tracker chart goes beyond just recording your weight each week. Include date and weight in both kg and stone for easy reference against NHS health thresholds. Recording your BMI helps you monitor progress towards a healthy BMI range (18.5–24.9 for most adults, or 18.5–22.9 for adults of South Asian, Chinese, Black African, or Black Caribbean heritage). Consider tracking waist circumference too — the NHS recognises this as an important health marker independent of weight. Many people also log energy levels, mood, sleep quality, and any changes in weight-related health conditions like blood pressure or blood sugar levels. If you're using prescription weight management medication like Mounjaro or Wegovy, note the dose and any side effects. Our free progress tracker can help you log these details systematically, making patterns easier to spot over time.
- Weight in both kg and stone for UK context
- BMI calculation using your height
- Waist circumference measurement
- Energy, mood, and sleep notes
- Medication dose (if applicable)
- Any health improvements or changes
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
How Often Should You Weigh Yourself and Track Progress?
The NHS recommends weighing yourself once a week on the same day and at the same time for consistency — morning before breakfast and after the toilet is ideal. Weekly tracking helps you spot genuine progress rather than natural daily fluctuations caused by hydration, food, or hormones. Weight naturally varies by 1–2 kg day-to-day, so daily weighing can be demoralising and misleading. Record your weight immediately and plot it on your chart to visualise the trend. Over 4–8 weeks, you should start seeing a downward trend if you're maintaining a calorie deficit of around 500 kcal daily, which typically results in loss of approximately 0.5 kg per week. A sustainable weight loss rate for most people is 0.5–1 kg weekly. Use our free weight converter to switch between units instantly, and our BMI calculator to track how your BMI changes as you progress.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
What's the best way to set up a weight tracker chart?
Start with a simple spreadsheet or printed chart with columns for date, weight (kg and stone), and BMI. Plot your weight weekly on the same day and time. Add columns for notes like energy levels or medication dose if tracking weight loss treatment. A line graph showing your weight trend over weeks is more motivating than individual numbers alone.
Is daily weighing bad when tracking weight loss?
Daily weighing isn't harmful, but it's often discouraging. Weight fluctuates 1–2 kg daily due to hydration, food, and hormones. Weekly weighing gives a clearer picture of genuine progress. If you do weigh daily, plot only your weekly weigh-in on your main tracker chart to reduce noise.
How long does it take to see progress on a weight tracker chart?
Most people notice visible progress after 4–6 weeks of consistent tracking. If you're in a sustainable calorie deficit of around 500 kcal daily, you may lose approximately 0.5 kg weekly, showing clear downward trends on your chart within this timeframe.
Should I track weight loss differently if taking Mounjaro or Wegovy?
Tracking remains the same — weekly weigh-ins, recording both kg and stone, and monitoring BMI. Additionally note your injection dose and date. Clinical trials showed average weight loss of 15–21% with Mounjaro and around 15% with Wegovy, though individual results vary significantly.
What if my weight tracker chart shows no progress for several weeks?
Plateaus are normal during weight loss. Check your calorie intake, increase physical activity, and ensure you're weighing consistently. If using prescription medication, discuss with your prescriber. Sometimes small improvements in energy, mood, or clothes fit occur even when weight plateaus.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.