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
Chart for Weight Loss — Track Your Progress
A weight loss chart is a practical tool to monitor your progress towards a healthier weight. In the UK, weight management is central to NHS health guidance, and tracking your results helps you stay motivated and accountable. Whether you're losing weight through lifestyle changes alone or with prescription weight loss medication, charting your journey makes a real difference. Our free progress tracker helps you log weekly or monthly changes, whilst our BMI calculator shows how your weight shifts affect your health status.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
How Weight Loss Charts Work
A weight loss chart tracks your weight over time, typically plotted weekly or monthly. The NHS recommends losing weight at a steady rate of 0.5 to 1 kg per week for sustainable results — this equates to roughly 2 to 4 kg per month. A chart visually demonstrates this progress and helps you spot patterns. Charts are especially useful if you're following prescription weight loss medication, as they show actual results against clinical trial expectations. For example, in the STEP trial, adults on semaglutide (Wegovy) lost an average of around 15% of their body weight — a chart helps you track whether you're on a similar trajectory. You can plot weight in stone, pounds, or kilograms depending on your preference. Our free progress tracker above allows you to log your weight and watch your personalised trend line develop over weeks and months.
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.
Setting Realistic Weight Loss Goals
Before starting your chart, set a realistic goal. Use our free BMI calculator to find your current BMI and identify your healthy weight range — typically a BMI of 18.5 to 24.9 for UK adults (lower for South Asian, Chinese, Black African, or Black Caribbean heritage). Rather than aiming for a dramatic end weight, focus on losing 5 to 10% of your body weight first — this produces measurable health benefits including improved blood pressure, better blood sugar control, and reduced joint strain. If you're considering prescription weight loss medication as part of your weight management plan, your prescriber will discuss realistic targets. Weight management UK services and NHS guidance emphasise sustainable progress over rapid loss, making a chart an invaluable record of your genuine achievement.
- 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 is a good weight loss chart format?
The best chart shows your weight on the vertical axis and time (weeks or months) on the horizontal axis. Plot your weight weekly on the same day and time for accuracy. Include a target weight line so you can see progress towards your goal. Our free progress tracker automates this — simply enter your weight and it calculates the trend for you.
How do I use a weight loss chart with GLP-1 weight loss medication?
If you're using prescription weight loss medication like Wegovy or Mounjaro, your chart becomes even more valuable. Log your weight weekly and compare your actual results to the clinical trial averages — roughly 15 to clinically studied weight loss over 6 to 12 months, depending on the medication and dose. This helps you and your prescriber assess whether the medication is working as expected.
What if my weight loss chart shows no progress?
Plateaus are normal and don't mean failure. Weight often stabilises for 2 to 4 weeks before the next drop. If you've plateaued for over 6 weeks, review your diet, activity level, and sleep. Consult your GP or a weight management specialist — they may suggest adjusting your approach or, if appropriate, exploring prescription weight loss options.
Can I use a weight loss chart for NHS weight management?
Absolutely. If you're referred to an NHS specialist weight management service, they often ask you to keep a weight record. A chart demonstrates your commitment and provides valuable data. Many services provide their own tracking tools, but our free weight loss tracker works alongside NHS care.
Should I track anything else besides weight on my chart?
Weight alone tells only part of the story. Consider also tracking your BMI (use our free BMI calculator), waist circumference, how clothes fit, and energy levels. Non-scale progress is often more motivating and reflects real health improvement, especially if you're combining weight loss with exercise, which builds muscle.
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.