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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What's a Healthy Weight for a 5'9" Man?
For a man who is 5'9" (175 cm) tall, the healthy weight range according to NHS guidelines is approximately 59–79 kg (9 stone 4 lbs to 12 stone 5 lbs). This range is based on a healthy BMI of 18.5 to 24.9, which represents the weight band associated with the lowest health risk for most UK adult males. However, individual healthy weight varies depending on muscle mass, bone density, and frame size. Use our free BMI calculator to find your personal healthy weight range and discover where your current weight falls on the health spectrum.
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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.
NHS Healthy Weight Range for 5'9" Men
The healthy weight range for a 5'9" (175 cm) adult male is 59–79 kg, or 9 stone 4 lbs to 12 stone 5 lbs in UK measurements. This is calculated using the NHS BMI healthy range of 18.5 to 24.9.
- Lower healthy boundary: 59 kg (9 stone 4 lbs) — BMI 18.5
- Upper healthy boundary: 79 kg (12 stone 5 lbs) — BMI 24.9
- Midpoint (average healthy weight): approximately 69 kg (10 stone 13 lbs)
For context, the average UK adult male height is 5'9", and the average UK male weight is approximately 85.7 kg (13 stone 7 lbs). This means many UK men fall into the overweight category (BMI 25–29.9), which is why understanding your personal healthy weight range is important. You can convert your weight between kg and stone instantly using our free weight converter to track exactly where you stand.
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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
Whilst NHS BMI provides a clear healthy weight range, your ideal body weight may vary based on several individual factors. Muscle mass is the most significant — lean muscle is denser than fat, so athletic men with high muscle content may weigh more than the BMI range suggests whilst maintaining excellent health. Frame size also matters; men with larger bone structure naturally weigh more at the same height.
- Age: Metabolism slows with age, affecting weight distribution
- Ethnicity: South Asian and Black British men may face elevated health risks at lower BMI levels — the NHS recommends lower thresholds for these groups
- Medical history: Existing conditions like diabetes or high blood pressure may influence your target weight
Your GP can provide personalised guidance on what healthy weight means for your specific circumstances.
- 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 BMI should a 5'9" man aim for?
According to NHS guidelines, a healthy BMI for any adult is 18.5 to 24.9. For a 5'9" man, this translates to a weight range of 59–79 kg (9 stone 4 lbs to 12 stone 5 lbs). A BMI within this range is associated with the lowest health risks. You can calculate your exact BMI using our free BMI calculator on this page.
Is 85 kg a healthy weight for a 5'9" man?
At 85 kg (13 stone 5 lbs), a 5'9" man would have a BMI of approximately 27.8, which falls into the overweight category (BMI 25–29.9) rather than the healthy range. Whilst not in the obese category, the NHS suggests aiming for below 79 kg to achieve a healthy BMI of under 25.
What's the average weight for a 5'9" UK male?
The average UK adult male weighs approximately 85.7 kg (13 stone 7 lbs) and stands around 5'9" tall. This average weight corresponds to a BMI of roughly 27.9, meaning many UK men are technically overweight according to NHS classifications. Even a modest weight loss towards the healthy range can improve health outcomes.
How much weight should a 5'9" man lose to reach a healthy BMI?
If you're currently at the UK male average of 85.7 kg, reducing to the upper healthy boundary of 79 kg would require losing approximately 6.7 kg (about 1 stone). The NHS recommends losing weight at a sustainable rate of 0.5–1 kg per week, which would take 7–13 weeks. Our free progress tracker helps you monitor gradual weight loss safely.
Does muscle mass change the healthy weight for a 5'9" man?
Yes — muscle weighs more than fat. A muscular man with high lean mass might weigh 82 kg at 5'9" but still be very healthy because muscle is dense. BMI doesn't distinguish between muscle and fat, which is why it's a screening tool rather than a diagnostic measure. If you're athletic, your GP can advise whether a higher weight within or above the BMI range is appropriate 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.