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
Man BMI Chart — UK Health Ranges Explained
A man's BMI chart shows where your weight falls across NHS health categories, from underweight through to severely obese. BMI (body mass index) is calculated using your height and weight, and the NHS uses standard ranges to help assess health risk. This guide explains the exact BMI thresholds for men in the UK, how to find your personal BMI, and why BMI matters alongside other health measures. Use our free BMI calculator above to find your exact BMI instantly based on your height and weight.
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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 BMI Categories for Men — UK Standard Ranges
The NHS BMI formula is the same for all adults: weight (kg) ÷ height (m)². The healthy BMI range for men is 18.5 to 24.9, which represents a balanced weight relative to your height. The BMI categories UK standard breaks down as follows: underweight is below 18.5; healthy weight is 18.5–24.9; overweight is 25.0–29.9; obese (Class I) is 30.0–34.9; obese (Class II) is 35.0–39.9; and severely obese is 40.0 and above.
For example, a man who is 5ft 8in (173cm) and weighs 70kg has a BMI of approximately 23.4, which falls in the healthy weight range. However, if the same man weighs 85kg, his BMI becomes approximately 28.5, which crosses the overweight BMI threshold into the overweight category. Use our BMI calculator on this page to check where your personal weight sits within these ranges.
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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.
BMI Limitations and What Else Matters
BMI limitations are important to understand: BMI does not distinguish between muscle and fat, so athletes or men with high muscle mass may have a high BMI but low body fat. BMI also ignores where fat is stored — abdominal fat carries greater health risk than fat stored elsewhere. The NHS recommends also measuring waist circumference: for men, a waist over 94cm (37 inches) indicates increased health risk, and over 102cm (40 inches) indicates high risk.
Your GP can provide personalised health advice based on your BMI, waist measurement, blood pressure, and other factors. Use our free weight converter to check your weight in different units (kg, stone, lbs), and track changes over time with our progress tracker to monitor your health journey.
- 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 a healthy BMI for a man?
According to NHS guidelines, a healthy BMI for men is between 18.5 and 24.9. A man at 5ft 9in with a weight between approximately 55kg and 74kg would fall into this healthy range. Individual health depends on multiple factors, so your GP can provide personalised advice.
How do I calculate my BMI as a man?
Use the BMI formula: your weight in kg divided by your height in metres squared. For example, if you weigh 75kg and are 1.75m tall: 75 ÷ (1.75 × 1.75) = 24.5 BMI. Our free BMI calculator above does this instantly.
What BMI is overweight for men?
The overweight BMI range is 25.0 to 29.9 according to NHS standards. A man in this range has increased health risks compared to the healthy range, but overweight does not automatically mean health problems — your GP can assess your individual situation.
Does BMI work for muscular men?
BMI has limitations for muscular men because it does not distinguish between muscle and fat mass. A man with high muscle mass may have a high BMI but low body fat percentage. Waist circumference and body composition are more accurate measures in this case.
What should I do if my BMI is above 30?
If your BMI is 30 or above, speak to your GP who can assess your health, discuss lifestyle changes, and advise whether any treatment options are appropriate. NHS weight management services offer support, and your GP can refer you to specialist services if needed.
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.