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
What Is a Normal BMI for Men?
A normal or healthy BMI for men in the UK is between 18.5 and 24.9, according to NHS guidelines. This range indicates a healthy weight relative to height and is associated with the lowest risk of weight-related health problems. However, BMI is just one screening tool — it doesn't account for muscle mass, bone density, or overall fitness. Your GP can give you personalised guidance on whether your weight is healthy for you. Use our free BMI calculator above to check your personal BMI instantly and see where you fall on the healthy BMI range.
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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.
Understanding the Healthy BMI Range for Men
The healthy BMI formula is straightforward: weight (kg) divided by height (metres) squared. For men, the NHS BMI categories are clear:
- Below 18.5: Underweight
- 18.5 to 24.9: Healthy weight (normal BMI)
- 25.0 to 29.9: Overweight
- 30.0 to 34.9: Obese (Class I)
- 35.0 to 39.9: Obese (Class II)
- 40.0 and above: Severely obese (Class III)
For a man who is 1.75m (5ft 9in) tall, a healthy weight range falls between approximately 56.6kg (8st 13lbs) and 76.2kg (11st 12lbs). The overweight BMI threshold for men begins at 25.0 — just above this healthy range. These bmi categories uk guidelines are based on research showing lowest health risks within the normal BMI range. Calculate your exact healthy weight range using our free BMI calculator.
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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 — a man with significant muscle mass may have a high BMI but low body fat. Age, ethnicity, and body composition all affect what a "healthy" weight truly means for you individually. The NHS recommends considering waist circumference alongside BMI: for men, a waist above 94cm (37in) suggests increased health risk, and above 102cm (40in) suggests high risk, regardless of BMI. Your GP can assess your overall health using BMI, waist measurement, blood pressure, and blood work — not BMI alone. Use our weight converter to track your weight in the units most familiar to you as part of 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 BMI should a healthy man aim for?
A healthy BMI for men is between 18.5 and 24.9 according to NHS guidelines. Within this range, health risks related to excess weight are lowest. However, "healthy" also depends on your individual health, fitness level, and any existing medical conditions — speak to your GP for personalised advice.
How do I calculate my normal BMI as a man?
Use the BMI formula: weight in kg divided by height in metres squared. For example, an 80kg man who is 1.80m tall has a BMI of 80 ÷ (1.80 × 1.80) = 24.7 (healthy weight). Our free BMI calculator does this instantly for you.
Is a BMI of 25 overweight for men?
Yes, a BMI of 25.0 falls into the overweight category according to NHS guidelines. The healthy BMI range ends at 24.9. However, BMI is one tool only — muscle mass, waist circumference, and overall health also matter. Your GP can provide context for your specific situation.
Does ethnicity affect normal BMI ranges for men?
Yes. The NHS recommends lower BMI thresholds for men of South Asian, Chinese, Black African, or Black Caribbean heritage due to higher cardiovascular risk at lower BMI levels. For these groups, a healthy BMI may start at 18.5 to 22.9 rather than 24.9. Discuss your ethnicity-specific thresholds with your GP.
What's the difference between normal BMI and healthy weight?
Normal BMI (18.5–24.9) is a statistical range based on population health data. Healthy weight is individual and depends on your height, age, muscle mass, fitness, and medical history. A man can be within a normal BMI range and still benefit from lifestyle improvements. Your GP can help define healthy weight for you personally.
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.