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
Average Weight For People — UK Data and Health Context
The average weight for UK adults varies by age, sex, and height, but current data shows that men weigh approximately 85.7 kg (13 stone 7 lbs) and women approximately 71.6 kg (11 stone 3 lbs) on average. However, average does not mean healthy — understanding your ideal body weight and healthy weight range for your height is more important for your health than knowing the average. The NHS uses BMI to define healthy weight ranges, which take your individual height into account. Use our free BMI calculator to find your personal healthy weight range and see how your weight affects your health.
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.
Average UK Adult Weight — Current Data
According to the Office for National Statistics (ONS), current average weights for UK adults are:
- Men: approximately 85.7 kg (13 stone 7 lbs) at an average height of 175.3 cm (5 ft 9 in), giving an average BMI of 27.9
- Women: approximately 71.6 kg (11 stone 3 lbs) at an average height of 161.6 cm (5 ft 3.5 in), giving an average BMI of 27.4
Importantly, the average UK weight is in the overweight range according to NHS guidelines (BMI 25–29.9). This reflects current public health trends rather than a healthy benchmark. Your healthy weight range for height uk is what matters most — not how you compare to the average. The NHS healthy weight calculator uses your specific height to determine your personal healthy range, which typically spans from a BMI of 18.5 to 24.9. Use our weight converter to check your weight in both metric and imperial measurements.
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 — What Matters More Than Average
Rather than comparing yourself to average weight, focus on your healthy weight range according to NHS guidance. Your ideal weight depends on your height, age, muscle mass, and frame size — not on what others weigh. For most adults, a healthy BMI falls between 18.5 and 24.9. If you are 5 ft 8 in (173 cm) tall, your healthy weight range is approximately 55–74 kg (8 st 10 lbs to 11 st 9 lbs). For those of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds because these groups face higher health risks at lower BMI levels. Even a 5–10% reduction from your current weight can bring meaningful health benefits, including lower blood pressure, improved blood sugar control, and reduced joint strain.
- 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 average weight for an adult in the UK?
According to ONS data, the average weight for UK men is approximately 85.7 kg (13 stone 7 lbs) and for women approximately 71.6 kg (11 stone 3 lbs). However, average is not the same as healthy — the NHS uses BMI to define healthy weight ranges based on individual height, which is a better health reference point.
Is the average weight healthy?
No. The average UK adult weight currently falls into the overweight BMI range (25–29.9). This reflects public health trends, not a healthy benchmark. A healthy BMI is 18.5–24.9 according to NHS guidelines. Your personal healthy weight depends on your height, not on how you compare to others.
What is my ideal weight for my height?
Your ideal body weight depends on your height, age, frame size, and muscle mass. Use our free BMI calculator to find your healthy weight range — enter your height and it will show the range of weights that fall into the healthy BMI category (18.5–24.9) specifically for you.
How do I find my healthy weight range?
The easiest way is to use our free healthy weight calculator on this page, which shows your BMI-based healthy range instantly. Alternatively, multiply your height in metres squared by 18.5 (lower bound) and 24.9 (upper bound). For example, at 1.70 m: lower = 18.5 × (1.70)² = 53.4 kg; upper = 24.9 × (1.70)² = 71.9 kg.
Does my healthy weight differ if I'm from a South Asian or Black African background?
Yes. The NHS recommends lower BMI thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage because these groups have higher risk of type 2 diabetes and heart disease at lower BMI levels. For these populations, a healthy BMI starts at 18.5–22.9 rather than 18.5–24.9. Discuss your personal healthy weight range with your GP if you fall into these groups. ```
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.