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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Average Body Weight To Height In The UK
Average body weight varies significantly by height, and knowing where you fall helps you understand your personal health context. In the UK, the average adult man weighs approximately 85.7 kg (13 stone 7 lbs) at a height of 175.3 cm (5 feet 9 inches), while the average adult woman weighs around 71.6 kg (11 stone 3 lbs) at 161.6 cm (5 feet 3.5 inches). However, average doesn't mean healthy — using our free BMI calculator and weight converter, you can assess whether your personal weight falls within the healthy range for your specific height according to NHS guidance.
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 (NHS Standards)
Rather than a single "ideal" weight, the NHS recommends a healthy weight range based on your height and BMI. A healthy BMI sits between 18.5 and 24.9 for most UK adults. Using these thresholds, you can calculate your personal healthy weight range:
- 160 cm (5ft 3in): healthy weight range approximately 47–64 kg (7st 5lbs – 10st 1lbs)
- 170 cm (5ft 7in): healthy weight range approximately 53–72 kg (8st 5lbs – 11st 5lbs)
- 180 cm (5ft 11in): healthy weight range approximately 60–81 kg (9st 6lbs – 12st 11lbs)
These ranges account for natural variation in frame size and muscle mass. Our free BMI calculator on this page instantly shows your personal healthy weight range for your exact height — far more useful than comparing yourself to population averages, which don't account for individual factors like age, genetics, and fitness level.
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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.
Why Average Weight Doesn't Tell The Whole Story
Average body weight statistics can be misleading because they mask significant individual variation and don't distinguish between healthy and unhealthy weight distributions. The UK average weights cited above actually reflect a population where 63% of adults are overweight or obese — so the "average" is higher than the healthy range for many heights. Your weight in isolation means little; what matters is whether it falls within the healthy BMI range for your height.
Factors affecting your healthy weight include: muscle mass (athletes may be heavier than average yet healthy), genetics, age, and where your body stores fat. Rather than focusing on matching an average, use our weight converter and BMI calculator to establish your personal healthy weight range, then discuss any concerns with your GP, who can provide tailored health guidance.
- 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 body weight for a woman who is 5 feet 6 inches tall?
The average weight varies, but for a woman of 168 cm (5ft 6in), the UK population average is approximately 72 kg (11st 4lbs). However, the healthy weight range for this height is 49–66 kg (7st 10lbs – 10st 5lbs) according to NHS BMI guidelines. Use our free weight converter to switch between units, and our BMI calculator to find your personal healthy range.
Is there a different healthy weight range for men and women at the same height?
No — the healthy BMI ranges (18.5–24.9) are the same for men and women at the same height. However, body composition differs: men typically have more muscle mass, which is denser than fat. Two people of identical height and weight may have different body fat percentages. This is why BMI has limitations; it doesn't distinguish muscle from fat.
How do I know if my weight is healthy for my height?
The best way is to calculate your BMI using your weight and height. A BMI between 18.5 and 24.9 is considered healthy by the NHS. Use our free BMI calculator on this page — it instantly shows your BMI, healthy weight range for your height, and how you compare to NHS guidelines. If you're concerned, your GP can provide personalised health advice.
Why does average UK body weight seem higher than the healthy weight range?
Because the UK population average includes many people who are overweight or obese. Approximately 63% of UK adults fall outside the healthy BMI range, which pulls the population average upward. This is why comparing yourself to national averages is less useful than checking your personal BMI against NHS healthy weight guidelines.
Does healthy weight change with age?
BMI categories remain the same across adulthood (18.5–24.9 is healthy). However, muscle mass naturally decreases with age, so maintaining the same BMI may require adjusting your diet and exercise. Older adults should discuss healthy weight targets with their GP, as individual health factors become more significant. ```
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.