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 Is the Average Human Weight in the UK?
The average weight for UK adults varies by age, sex, and height, but recent data shows the typical adult man weighs around 85.7 kg (13st 7lbs) and the typical adult woman weighs approximately 71.6 kg (11st 3lbs). However, average weight is different from healthy weight. According to NHS guidance, what matters more is whether your weight falls within a healthy range for your individual height — which is why BMI is a useful screening tool. Use our free BMI calculator above to check where your weight sits relative to NHS health thresholds.
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.
UK Average Weight Data and Health Context
According to the Office for National Statistics (ONS) and NHS data, the average weight for UK adults is:
- Men: approximately 85.7 kg (13st 7lbs), with average height 175.3 cm (5ft 9in)
- Women: approximately 71.6 kg (11st 3lbs), with average height 161.6 cm (5ft 3.5in)
However, average is not the same as healthy. The average UK adult man has a BMI of approximately 27.9, and the average woman 27.4 — both falling into the overweight category according to NHS guidelines. A healthy BMI sits between 18.5 and 24.9. This means many UK adults weigh more than the NHS considers a healthy weight for their height. Our free weight converter helps you switch between kg, stone, and pounds to see your weight in your preferred units.
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.
Healthy Weight Range vs Average Weight
Your healthy weight depends entirely on your height, not on what others weigh. Using our BMI calculator on this page, you can find the healthy weight range for your specific height. For example, an adult who is 5ft 8in (1.73 m) has a healthy weight range of approximately 55.4 kg to 74.5 kg (8st 10lbs to 11st 10lbs). If you're above this range, even modest weight loss of 5–10% can improve blood pressure, blood sugar, cholesterol, and joint health. The NHS recommends weight management through sustainable calorie reduction and increased physical activity. If you'd like to track your progress, our free progress tracker lets you log weight 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.
Is 85kg overweight for a man in the UK?
Not necessarily — it depends on height. A man who is 6ft 2in (188cm) at 85kg has a healthy BMI of around 24.1. The same man at 5ft 8in (173cm) and 85kg has a BMI of 28.5, which is overweight. Use our free BMI calculator to check your personal BMI based on your exact height and weight.
What's the healthy weight range for a woman in the UK?
According to NHS guidance, a healthy BMI is 18.5–24.9. For a woman of 5ft 5in (165cm), this equals approximately 50kg to 67kg (7st 11lbs to 10st 7lbs). For a woman of 5ft 2in (157cm), it's approximately 46kg to 61kg (7st 2lbs to 9st 9lbs). Height makes a significant difference.
Why do average weights vary by region in the UK?
Average weights differ by age, ethnic background, socioeconomic factors, and lifestyle. Younger adults typically weigh less than older adults. Additionally, the NHS recognises that certain ethnic groups (South Asian, Black African, Black Caribbean, Chinese) have higher health risk at lower BMI levels, so healthy weight thresholds may differ.
Is being above average weight always unhealthy?
No. Many people above the average weight are still within a healthy BMI range for their height. Conversely, some people at or below average weight may have an unhealthy BMI if they are very tall. Individual health depends on BMI relative to your height, not on matching an average figure.
How can I find my healthy weight range?
Calculate your BMI using our free BMI calculator above — it automatically calculates your healthy weight range based on your height. You can also use the NHS BMI healthy weight guide online. If you need personalised advice, your GP can discuss healthy weight targets for your specific circumstances.
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.