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
Ideal Weight for a 5'9" Male — UK Health Data
For a man who is 5'9" (175cm) tall, the healthy weight range according to NHS guidelines is approximately 59–79 kg (130–174 lbs or 9st 4lbs to 12st 6lbs). The exact ideal body weight within this range depends on factors like muscle mass, frame size, and overall fitness. The average UK male of this height weighs around 81 kg (12st 11lbs), which sits slightly above the healthy range. Use our free BMI calculator above to find your personal healthy weight target and track where you currently stand.
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 Range and NHS Guidelines for 5'9" Males
The healthy weight range for a 5'9" male is 59–79 kg (130–174 lbs), based on an NHS healthy BMI of 18.5–24.9. This translates to approximately 9st 4lbs to 12st 6lbs in UK measurements. At the lower end (59 kg / 9st 4lbs), BMI = 18.5; at the upper end (79 kg / 12st 6lbs), BMI = 24.9.
The midpoint ideal weight is approximately 69 kg (11st 0lbs), which represents a BMI of 21.6 — comfortably in the healthy range. However, "ideal" varies by individual: someone with significant muscle mass may weigh more but still be healthy, while someone with lower muscle mass might be healthier at a lower weight.
For reference, the average UK adult male of this height weighs around 81 kg (12st 11lbs), which places many men slightly into the overweight category (BMI 25–29.9). Even a modest weight loss of 5–10 kg can move into the healthy range and bring significant health benefits. Calculate your personal BMI using the healthy weight calculator on this page.
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 That Affect Your Ideal Weight
Muscle mass: Muscle is denser than fat, so someone with high muscle mass (athletes, regular gym-goers) may weigh more than the healthy range but still have low body fat. This is why BMI alone has limitations.
Frame size: People with larger bone structure naturally weigh more. Frame size varies between individuals and affects ideal weight by approximately 2–5 kg.
Age: Metabolism slows with age, and muscle naturally decreases after 30. Older adults may need slightly lower weights to maintain the same BMI and health markers.
Ethnicity: If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds (healthy range 18.5–22.9 rather than 18.5–24.9), as these groups face higher health risks at higher weights. Try our weight converter to check your current weight in stone and kg.
- 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 ideal weight for a 5'9" male according to NHS guidelines?
The NHS healthy weight range for a 5'9" (175cm) male is 59–79 kg (9st 4lbs to 12st 6lbs). The ideal midpoint is around 69 kg (11st 0lbs). However, individual ideal weight varies based on muscle mass, frame size, and other factors. Your GP can give personalised advice for your situation.
What's the average weight for a 5'9" UK male?
The average UK adult male of this height weighs approximately 81 kg (12st 11lbs). This is slightly above the NHS healthy range and reflects the fact that around 63% of UK adults are overweight or obese. However, average does not mean ideal — the healthy weight range remains 59–79 kg.
How do I work out my ideal weight if I have a lot of muscle?
If you're muscular, you may weigh more than the healthy range but still be healthy. BMI doesn't distinguish between muscle and fat. Body composition (your ratio of muscle to fat) and how you feel are better guides than weight alone. Your GP or a fitness professional can assess this more accurately.
Is 70 kg a good weight for a 5'9" male?
Yes, 70 kg (11st 0lbs) is an excellent weight for a 5'9" male. This gives a BMI of approximately 21.6, which is solidly in the healthy range. This weight is appropriate for most frame sizes and fitness levels at this height.
Should I aim for the lower or upper end of the healthy weight range?
Both are healthy — it depends on your frame size, muscle mass, and personal health goals. A larger-framed person may healthily sit at 75–79 kg, while a smaller frame might be ideal at 59–65 kg. Use our BMI calculator to find what weight range works for your height, and discuss targets with your GP.
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.