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
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Weight and Height Graph — Understanding Your Healthy Range
A weight and height graph is a visual tool that shows the relationship between your height and healthy weight ranges according to NHS guidance. These charts help you understand where your weight falls — whether it's in the healthy weight range, overweight, or obese category — and what your body mass index (BMI) might be. For UK adults, weight and height graphs typically use stone and pounds or kilograms, making it easy to assess your health status at a glance. Understanding your position on such a graph can motivate informed decisions about weight management and overall health.
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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.
How Weight and Height Graphs Work
Weight and height graphs plot your height on one axis and weight on the other, with coloured zones representing different BMI categories. The NHS uses five main BMI categories: healthy weight (18.5–24.9), overweight (25–29.9), obese class I (30–34.9), obese class II (35–39.9), and severely obese (40+).
For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — healthy weight begins at 18.5 but overweight starts at 23, reflecting higher health risks at lower BMI levels for these groups.
To use a weight and height graph, find your height on the vertical axis and your current weight on the horizontal axis, then see where they intersect. This intersection point shows your BMI category instantly. Try our free BMI calculator above for a precise calculation, or use our weight converter to switch between stone, pounds, and kilograms. These tools complement weight and height graphs by providing exact figures rather than visual approximations.
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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.
Why Weight and Height Graphs Matter for Health
Weight and height graphs provide quick visual context for understanding whether your current weight poses health risks. Being in the healthy weight range — roughly 18.5 to 24.9 BMI — reduces your risk of type 2 diabetes, heart disease, high blood pressure, and certain cancers.
Even modest weight loss of 5–10% of body weight can improve blood pressure, blood sugar control, and joint health. If a graph shows you're outside the healthy range, it's worth discussing options with your GP, who can assess your individual situation and recommend support — whether that's lifestyle changes, NHS weight management services, or other guidance. Regular monitoring using weight and height graphs, alongside our free progress tracker, helps you stay accountable and see changes over time.
- 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 healthy weight for my height according to UK standards?
Use our free BMI calculator to find your exact healthy weight range. As a guide, a BMI of 18.5–24.9 is healthy for most UK adults, though those of South Asian or Black African heritage should aim for 18.5–22.9. Your GP can advise on your individual healthy weight range based on your health history.
How do I read a weight and height graph?
Find your height on the vertical axis and your weight on the horizontal axis. Where they meet shows your BMI category. Colour zones typically indicate healthy weight (green), overweight (yellow), and obese (red). For exact BMI, use our BMI calculator — it's more precise than visual estimates.
Are weight and height graphs accurate for everyone?
Graphs provide useful screening but have limitations. BMI doesn't distinguish between muscle and fat, so athletes may appear overweight despite being fit. Waist circumference and overall health also matter. Your GP can give personalised guidance beyond what a graph shows.
What should I do if a weight and height graph shows I'm overweight?
Start by speaking with your GP, who can assess your health and discuss options. The NHS recommends losing 0.5–1 kg per week through balanced diet and activity. Your GP may refer you to specialist weight management services or discuss other support available in your area.
Can I use a weight and height graph to track progress?
Yes, you can plot your weight monthly to see movement across the graph. However, our free progress tracker is more detailed — it logs weight changes, trends, and milestones over time, making it easier to spot patterns and stay motivated through your health journey.
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.