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 Weight for Men 5'8"
The average weight for a man aged 5'8" (173 cm) in the UK is approximately 85.7 kg (13 stone 7 lbs), according to the latest Office for National Statistics (ONS) data. However, average weight and ideal body weight are different things. At this height, the NHS healthy weight range is between 55.4 kg (8 stone 10 lbs) and 74.5 kg (11 stone 10 lbs). Understanding where you fall within that range—and what factors affect your personal ideal weight—is key to making sense of health statistics.
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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.
Healthy Weight Range at 5'8"
At 5'8" (173 cm), the NHS healthy weight range is 55.4 kg to 74.5 kg (8 stone 10 lbs to 11 stone 10 lbs), which corresponds to a BMI of 18.5 to 24.9. This is the gold standard for adult weight guidance in the UK. The average weight for UK men is around 85.7 kg (13 stone 7 lbs), but this average is significantly higher than the healthy range because many UK men are overweight or obese.
To put this in perspective: if you weigh 70 kg (11 stone 0 lbs) at 5'8", your BMI would be approximately 21, which falls comfortably in the healthy weight category. Use our free BMI calculator above to check your personal BMI instantly and see where you stand relative to NHS guidelines.
- Healthy range (BMI 18.5–24.9): 55–74.5 kg
- Overweight (BMI 25–29.9): 74.5–89 kg
- Obese (BMI 30+): 89 kg and above
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.
Factors Affecting Your Ideal Weight at This Height
Your ideal weight depends on more than just height. Muscle mass, frame size, age, and ethnicity all play a role. A muscular 70 kg man at 5'8" may be healthier than a sedentary 65 kg man at the same height, because muscle is denser than fat. Frame size matters too—men with larger bone structures naturally carry more weight within a healthy range.
Age affects ideal weight: as you get older, some loss of muscle mass is normal, so your ideal weight may shift slightly. Additionally, men of South Asian, Chinese, Black African, or Black Caribbean heritage may benefit from aiming for the lower end of the healthy weight range, as NHS guidance recognises these groups face higher cardiovascular risk at the same BMI. Convert your weight between kg and stone using the weight converter on this page to track where you are in the healthy range.
- 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's the difference between average weight and ideal weight for a man 5'8"?
Average weight reflects what many UK men actually weigh (around 85.7 kg), while ideal weight is the range that supports good health according to NHS guidelines (55–74.5 kg). Average and ideal are not the same—most UK men are overweight by NHS standards.
Is 70 kg a healthy weight for a man 5'8"?
Yes. At 5'8" (173 cm), 70 kg gives a BMI of approximately 21, which falls solidly in the healthy weight range (BMI 18.5–24.9) according to NHS guidelines.
How do I calculate my healthy weight range at 5'8"?
Use the formula: lower bound = 18.5 × height(m)² and upper bound = 24.9 × height(m)². At 5'8", this gives 55–74.5 kg. Our free healthy weight calculator above can do this instantly for your height.
Does muscle mass affect what I should weigh at 5'8"?
Yes. BMI doesn't distinguish between muscle and fat. Two men weighing 75 kg at 5'8" can have very different body compositions. A muscular man may be healthier than a less active man at the same weight.
Are there different healthy weight ranges for different ethnicities at 5'8"?
The NHS recommends lower healthy weight thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage due to higher cardiovascular risk at standard BMI levels. Your GP can discuss what's ideal for your individual background.
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.