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
BMI Chart for UK Men — What's a Healthy Weight?
A BMI chart for men shows you where your weight falls on the NHS health scale. Understanding your BMI helps you assess whether you're at a healthy weight for your height. The NHS uses standard BMI categories to guide health decisions, though BMI is just one measure of health. Use our free BMI calculator above to find your personal BMI instantly, then compare it against the ranges shown in this guide.
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.
NHS BMI Categories and Healthy Ranges for Men
The NHS BMI formula is: weight (kg) divided by height (m) squared. For UK men, the healthy BMI range is 18.5 to 24.9. Here's how the bmi categories uk system works:
- Underweight: Below 18.5
- Healthy weight: 18.5–24.9
- Overweight: 25.0–29.9
- Obese (Class I): 30.0–34.9
- Obese (Class II): 35.0–39.9
- Severely obese (Class III): 40.0+
For example, a man who is 1.75m tall (5ft 9in) with a healthy BMI would weigh between approximately 56.6 kg (8st 13lbs) and 76.2 kg (11st 13lbs). You can use our free weight converter to check these ranges in stone and pounds, or calculate your exact healthy weight range with the BMI calculator on this page.
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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.
BMI Limitations and What Else Matters for Men's Health
While bmi chart data is useful, BMI limitations are important to understand. BMI does not distinguish between muscle and fat—a muscular man may have a higher BMI despite being very fit. Waist circumference is equally important: men with a waist over 94cm (37in) have increased health risk, and over 102cm (40in) have high risk. The NHS also recommends monitoring blood pressure, cholesterol, and blood sugar. Discuss your personal health goals with your GP, who can assess your overall picture beyond BMI alone.
- 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 the BMI formula used in the UK?
The BMI formula is weight in kilograms divided by height in metres squared. For example, a man weighing 80kg who is 1.75m tall would have a BMI of 80 ÷ (1.75)² = 26.1. Our BMI calculator does this instantly for you.
What is the healthy BMI range for men in the UK?
According to NHS guidelines, the healthy BMI range for men is 18.5 to 24.9. A BMI below 18.5 is classed as underweight, and above 25 is overweight. Your GP can advise on your personal healthy weight target.
Is BMI accurate for muscular men?
No. BMI does not account for muscle versus fat. A very muscular man may have a high BMI but low body fat. Waist circumference and overall fitness are also important health markers alongside BMI.
What is a healthy weight for a man who is 5ft 10in?
A man who is 5ft 10in (178cm) falls within the healthy weight range of approximately 60kg to 81kg (9st 6lbs to 12st 10lbs) for a BMI of 18.5–24.9. Use our weight converter to check these in different units.
Should men use the same BMI categories as women?
Yes. The NHS BMI categories (18.5–24.9 healthy, 25–29.9 overweight, 30+ obese) apply equally to men and women. However, waist circumference thresholds differ: men with waist over 94cm face increased cardiovascular risk.
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.