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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Waist Ratio for Men — What You Need to Know
Waist-to-height ratio is a simple but powerful health measurement that may be more useful than BMI alone for assessing cardiovascular risk in men. Unlike BMI, which doesn't distinguish between muscle and fat, your waist measurement reflects where fat is stored — and abdominal fat is linked to higher health risks. The NHS recommends keeping your waist-to-height ratio below 0.5, regardless of your weight. This free UK health guide explains how to calculate your ratio, what it means, and why it matters for your long-term wellbeing.
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.
How to Calculate Your Waist-to-Height Ratio
Waist-to-height ratio is calculated by dividing your waist circumference by your height, using the same unit of measurement for both.
The formula: Waist circumference ÷ Height = Waist-to-height ratio
Example: If you are 180 cm tall with a waist circumference of 85 cm, your ratio is 85 ÷ 180 = 0.47 (healthy range)
- Measure your waist at the narrowest point, level with your navel, without pulling the tape tight
- Ensure the tape measure is straight and parallel to the ground
- Take the measurement in the morning before eating, for consistency
- Use consistent units — either both in centimetres or both in inches
You can also use our free BMI calculator above, which provides context for your weight alongside waist measurement guidance, to get a fuller picture of your health.
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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.
NHS Guidelines and What Your Ratio Means
The NHS recommends a waist-to-height ratio below 0.5 for all adults, including men. This threshold is more reliable than BMI alone because it identifies central (abdominal) obesity, which is closely linked to type 2 diabetes, heart disease, and stroke risk.
- Below 0.5: Healthy range — lower cardiovascular risk
- 0.5 to 0.6: Overweight range — increased risk; lifestyle changes recommended
- Above 0.6: High-risk range; consult your GP for personalised health advice
For additional context, our weight converter can help you compare your measurements in different units, and the BMI calculator provides complementary insight into whether your overall weight is in a healthy range for your height.
- 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.
Why is waist-to-height ratio better than BMI for men?
BMI doesn't distinguish between muscle and fat, so muscular men may have high BMI despite low body fat. Waist-to-height ratio specifically measures central fat distribution, which is more strongly linked to cardiovascular and metabolic disease risk. Both measurements together give you the fullest picture.
How do I measure my waist correctly?
Measure at the narrowest point of your waist, level with your navel, keeping the tape measure horizontal and snug but not tight. Do this in the morning before eating for consistency. Take the measurement three times and use the average for accuracy.
What should my waist measurement be in stone and measurements?
There's no fixed target — it depends on your height. That's why the ratio (0.5 or below) is more useful than an absolute number. Use our weight converter and BMI calculator to see how your overall measurements fit within healthy UK guidelines.
Is waist-to-height ratio useful if I have lots of muscle?
Yes, it's more accurate than BMI if you're muscular, because it measures fat distribution rather than total weight. However, extremely muscular men may still have a higher ratio — your GP can help interpret this in context of your overall fitness and health.
What lifestyle changes help improve waist-to-height ratio?
Losing excess weight through a reduced-calorie diet, increasing physical activity (especially aerobic exercise), and reducing alcohol intake are proven to reduce waist circumference. Even a 5–clinically studied weight loss can significantly improve your ratio and reduce health risks. Your GP or a weight management service can provide personalised support.
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.