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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Healthy Weight Graph — Find Your Ideal Weight Range
A healthy weight graph shows the relationship between your height and ideal body weight using BMI (body mass index) as a guide. According to NHS guidelines, a healthy BMI falls between 18.5 and 24.9, which corresponds to a specific weight range depending on how tall you are. This guide explains how to read a healthy weight graph, what your ideal weight range should be, and how to use BMI to understand whether you're at a healthy weight. Our free BMI calculator on this page can help you find your personalised healthy weight range instantly.
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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.
Understanding Healthy Weight Ranges Using BMI
A healthy weight graph displays the healthy weight range for each height using BMI as the foundation. For adults in the UK, the NHS defines a healthy BMI range as 18.5 to 24.9, which translates to different kilogram amounts depending on your height:
- At 160cm (5ft 3in): healthy weight is approximately 47–64 kg (7st 5lbs – 10st 1lbs)
- At 170cm (5ft 7in): healthy weight is approximately 53–72 kg (8st 4lbs – 11st 4lbs)
- At 180cm (5ft 11in): healthy weight is approximately 60–80 kg (9st 6lbs – 12st 8lbs)
- At 190cm (6ft 3in): healthy weight is approximately 67–90 kg (10st 6lbs – 14st 2lbs)
The width of the healthy range accounts for differences in muscle mass, bone density, and body composition. Two people at the same height and weight can have very different body shapes and fitness levels. Use our free weight converter above to translate any of these weights between kg, stone, and pounds for easy reference.
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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.
How to Read Your Healthy Weight Graph
To find your healthy weight range on a graph, locate your height on the vertical axis and read across to where it intersects with the green (healthy) band. The width of that band represents your full healthy weight range in kg. For example, if you're 175cm tall, your healthy weight range is roughly 56–77 kg (8st 12lbs – 12st 2lbs). Important: BMI has limitations—it does not distinguish between muscle and fat, so athletes or very muscular individuals may have a higher BMI while being perfectly healthy. Your waist circumference also matters: men should aim for under 94cm (37in), women under 80cm (31.5in). Try our free BMI calculator above to check your personal BMI and see exactly where you fall on the healthy weight spectrum.
- 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 in the UK?
Your healthy weight depends on your height and is defined by a BMI of 18.5–24.9 according to NHS guidelines. Use our free BMI calculator on this page to enter your height and find your exact healthy weight range in kg and stone. For example, at 170cm, a healthy weight is roughly 53–72 kg.
Is the healthy weight graph the same for men and women?
Yes, the BMI-based healthy weight graph uses the same thresholds for both men and women. However, body composition differs—men typically have more muscle and less fat at the same weight. The graph is a screening tool; your GP can provide personalised advice based on your individual health, fitness level, and medical history.
Why does the healthy weight range have such a wide band?
The width reflects natural variation in body composition. Two people at the same height can have different amounts of muscle, bone density, and fat distribution. A 10–15 kg range allows for individual differences while staying within health guidelines. Factors like frame size and genetics also play a role.
What if my weight falls outside the healthy range?
If you're above the healthy range, even a 5–clinically studied weight loss can improve your health. If you're below, a GP can assess whether it's healthy for you. Our free BMI calculator and weight converter help track where you stand. Your GP can discuss personalised weight management options based on your age, health conditions, and lifestyle.
How accurate is BMI for measuring healthy weight?
BMI is a useful screening tool but has limitations. It doesn't account for muscle mass (so athletes may show as overweight), age-related muscle loss, or where fat is stored. Waist circumference and overall fitness matter too. For a complete picture of your health, discuss your results with your GP alongside other health markers like blood pressure and cholesterol.
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.