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
What's the Average Weight Per Height in the UK?
There's no single "ideal" weight — it varies by age, muscle mass, and individual factors. However, the NHS defines healthy weight ranges based on height and BMI. For example, an adult who is 5ft 8in (173cm) tall has a healthy weight range of approximately 55–74 kg (8st 9lbs to 11st 8lbs). The UK average for adults is around 85.7 kg for men and 71.6 kg for women, though many fall outside the healthy weight range. Use our free BMI calculator above to find your personal healthy weight range based on your height.
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.
Healthy Weight Ranges by Height (UK Standard)
The NHS uses BMI (body mass index) to define healthy weight ranges. For most UK adults, a healthy BMI falls between 18.5 and 24.9. Your healthy weight range depends entirely on your height.
Here are approximate healthy weight ranges for common UK heights:
- 5ft 0in (152cm): 45–57 kg (7st 0lbs – 8st 13lbs)
- 5ft 4in (163cm): 51–65 kg (8st 0lbs – 10st 3lbs)
- 5ft 8in (173cm): 55–74 kg (8st 9lbs – 11st 8lbs)
- 6ft 0in (183cm): 62–83 kg (9st 10lbs – 13st 1lb)
These ranges assume an average build. Your personal healthy weight may vary based on muscle mass and frame size. Try our weight converter to see your healthy range in both kg and stone instantly.
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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.
Factors That Affect Your Ideal Weight
Muscle mass: Muscle weighs more than fat, so athletes or very active people may have a higher healthy weight than average.
Frame size: Larger-framed individuals naturally weigh more at the same height; smaller frames weigh less.
Age: Metabolism naturally slows with age, affecting healthy weight ranges.
Ethnicity: The NHS recommends lower BMI thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage due to higher health risks at lower BMI levels.
Medical conditions: Certain conditions affect weight and ideal ranges. Your GP can advise on your personal healthy weight target.
- 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.
Is there an "ideal" weight for my height?
There's no single ideal weight — healthy ranges vary based on muscle mass, frame size, and individual factors. The NHS BMI healthy range (18.5–24.9) gives a weight range for your height. Use our free BMI calculator to find your personal range instantly based on your exact height.
What's the average UK adult weight?
The average UK adult man weighs approximately 85.7 kg (13st 7lbs) at an average height of 175 cm (5ft 9in). The average woman weighs approximately 71.6 kg (11st 3lbs) at 162 cm (5ft 4in). However, average does not mean healthy — many UK adults fall outside NHS healthy weight ranges.
How do I calculate my healthy weight range for my height?
Use the NHS BMI formula: healthy weight = 18.5 to 24.9 × height (in metres) squared. For example, at 1.73m (5ft 8in), healthy weight is 55–74 kg. Our free BMI calculator above does this instantly — simply enter your height and it shows your full healthy weight range in kg and stone.
Does muscle mass affect what I should weigh?
Yes. Muscle is denser than fat, so very muscular or athletic people may weigh more while still being healthy. BMI has limitations and doesn't distinguish muscle from fat. If you're very active or athletic, discuss your personal healthy weight range with your GP rather than relying on BMI alone.
Are healthy weight ranges different for different ethnicities?
Yes. The NHS recommends lower BMI thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage. For these groups, a healthy BMI starts at 18.5–22.9 (rather than 18.5–24.9) because they face higher health risks at standard BMI levels. Your GP can advise on appropriate ranges for you.
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.