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
UK Weight Chart — Find Your Healthy Weight Range
A weight chart for UK adults helps you understand what constitutes a healthy weight based on your height. Using NHS guidance, a healthy weight is determined by your BMI (body mass index), which falls between 18.5 and 24.9 for most adults. However, for people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower thresholds due to higher health risks at equivalent BMI levels. This uk health guide explains healthy weight ranges and how to find where you stand. Use our free BMI calculator above to check your personal BMI instantly, or explore our weight converter to switch between metric and imperial measurements.
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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.
UK Weight Ranges by Height — What's Healthy?
The NHS healthy weight range for UK adults is a BMI between 18.5 and 24.9 kg/m². Your healthy weight depends entirely on your height. For example, an adult who is 5ft 8in (1.73m) tall has a healthy weight range of approximately 55–75 kg (8st 8lbs to 11st 10lbs). Someone 5ft 4in (163cm) tall should aim for roughly 47–63 kg (7st 5lbs to 9st 13lbs). These ranges are based on scientific evidence about health risk. A BMI below 18.5 is considered underweight, 25–29.9 is overweight, and 30 or above is obese according to nhs guidance. However, BMI has limitations — it does not distinguish between muscle and fat, and ethnicity affects health risk at the same BMI. Your GP can provide personalised nhs health advice about what a healthy weight means for your individual circumstances, especially if you have existing health conditions.
Clinically BackedWeight Loss
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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.
Using a Weight Chart — Why It Matters
A weight chart helps you visualise where your current weight sits relative to healthy ranges. Understanding your position — whether overweight, healthy, or underweight — is a first step toward informed health decisions. Even reaching the lower end of your healthy weight range can improve blood pressure, blood sugar control, and joint health. Weight management is not about appearance; it is about reducing your risk of type 2 diabetes, cardiovascular disease, and other weight-related conditions. If you are significantly above a healthy range, sustainable loss of 0.5–1 kg per week is recommended by the NHS. Beyond a weight chart, consider waist circumference: men should aim for under 102cm (40in) and women under 88cm (34.5in) for reduced health risk. Track your progress with our free progress tracker to monitor weight loss over time alongside healthy lifestyle changes.
- 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 the healthy weight range for a 5ft 6in tall woman?
For an adult woman 5ft 6in (168cm) tall, the healthy weight range is approximately 50–67 kg (7st 12lbs to 10st 8lbs), based on a BMI of 18.5–24.9. However, if she is of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a slightly lower target range due to increased health risk at equivalent BMI levels. Your GP can advise on your personal healthy weight.
How do I convert my weight to check against a UK weight chart?
Use our free weight converter above to switch between kg, stone, and pounds instantly. For example, 70kg equals 11 stone 0.1lbs. Once converted, compare your weight to the healthy range for your height using NHS BMI guidelines. Our free BMI calculator also shows exactly where you fall on the healthy weight spectrum.
Is BMI the only measure of healthy weight?
No. While BMI is a useful screening tool, it has limitations — it does not account for muscle mass, bone density, or where fat is stored on your body. Waist circumference is equally important: increased risk starts at 94cm (37in) for men and 80cm (31.5in) for women. Combined with regular health checks from your GP, these measurements give a fuller picture of health.
What if I am significantly overweight according to a weight chart?
If you are overweight, the NHS recommends gradual, sustainable weight loss of 0.5–1 kg per week through a balanced diet and increased physical activity. If you have a BMI of 30 or above, or 27–29.9 with weight-related health conditions, your GP may refer you to weight management services or discuss prescription weight loss options. Weight loss of even 5–10% of your body weight can deliver meaningful health benefits.
Can I use a weight chart if I am of South Asian or Black African heritage?
Yes, but the thresholds differ. The NHS recommends that South Asian, Chinese, Black African, and Black Caribbean adults use a lower BMI range for healthy weight: 18.5–22.9 (instead of 18.5–24.9) due to higher cardiovascular risk at equivalent BMI levels. Discuss your individual healthy weight target with your GP, especially if you have family history of diabetes or heart disease.
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.