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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Height Weight BMI Table — Quick Reference Guide
A height weight BMI table is a quick way to see where your measurements fall on the NHS health scale. This guide shows you exactly how height and weight combine to calculate BMI, what the different BMI categories mean, and whether your current weight sits in a healthy range. Use our free BMI calculator above to find your exact BMI instantly, or refer to the reference table below to understand the context.
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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 BMI is Calculated and What the Categories Mean
BMI (Body Mass Index) is calculated using a simple formula: weight in kilograms divided by height in metres squared. The NHS uses standardised BMI categories to indicate health risk levels:
- Underweight: BMI below 18.5 — may indicate insufficient weight or muscle loss
- Healthy weight: BMI 18.5–24.9 — associated with lowest health risk for most adults
- Overweight: BMI 25.0–29.9 — increased risk of weight-related health conditions
- Obese (Class I): BMI 30.0–34.9 — significantly elevated health risks
- Obese (Class II): BMI 35.0–39.9 — high health risks including diabetes and heart disease
- Severely obese (Class III): BMI 40.0+ — very high health risks requiring medical support
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends using a lower healthy BMI range of 18.5–22.9, as these groups face higher diabetes and cardiovascular risk at standard BMI thresholds. Our free weight converter helps you switch between kg, stone, and pounds to find your exact measurements on any BMI table.
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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.
Why BMI Tables Have Important Limitations
While height weight BMI tables are useful screening tools, they have significant limitations you should understand. BMI does not distinguish between muscle and fat — a muscular athlete may have a high BMI but low body fat percentage. It also ignores where fat is stored; excess fat around the stomach carries greater health risk than fat on hips or thighs, regardless of BMI number. BMI is less accurate for elderly people (who naturally lose muscle), during pregnancy, or for people with certain medical conditions.
For this reason, your GP may also measure your waist circumference: men over 94cm (37 inches) have increased risk, and women over 80cm (31.5 inches) have increased risk. Combine BMI information with waist measurement and your GP's clinical judgment for a complete health picture. Use our free BMI calculator with this context in mind.
- 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 range for UK adults?
According to NHS guidelines, a healthy BMI is between 18.5 and 24.9 for most adults. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a lower range of 18.5 to 22.9 because these populations have higher health risks at standard BMI thresholds. Your GP can advise on your personal healthy range.
How do I use a height weight BMI table?
Find your height in the left column and your weight in the top row (in kg, stone, or lbs). Where they intersect shows your approximate BMI and category. However, for your exact BMI, use our free BMI calculator on this page — it's more precise than reading from a table.
Is BMI the only measure of healthy weight?
No. BMI is a useful screening tool but has limitations. Waist circumference is also important — the NHS recommends measuring around your natural waist. Muscle mass, age, and ethnicity all affect what a healthy weight means for you personally. Your GP can assess your individual health risk.
Why do people of South Asian background have different BMI thresholds?
Research shows South Asian, Chinese, Black African, and Black Caribbean populations have higher risk of type 2 diabetes and heart disease at lower BMI levels than white European populations. The NHS therefore recommends lower BMI thresholds for these groups to identify health risk earlier.
Can I use a BMI table if I'm very tall or very short?
BMI tables work for adults between roughly 150cm and 190cm tall. If you're outside this range, use our free BMI calculator instead — it handles any height accurately. BMI is not appropriate for children; use NHS growth charts for children instead.
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.