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
Height and Weight Chart for UK Adults
A height and weight chart helps you understand whether your weight is in a healthy range for your height. In the UK, we use stone and pounds alongside kilograms, and healthy weight ranges are based on Body Mass Index (BMI) — a measurement that accounts for both height and weight together. The NHS provides clear guidance on healthy weight ranges for adults, and these vary depending on your ethnicity and individual health factors. Rather than a one-size-fits-all chart, the best approach is to calculate your personal healthy weight range using your specific height and weight.
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 Healthy Weight Ranges and BMI Categories
In the UK, the NHS defines healthy weight as a BMI between 18.5 and 24.9 for most adults. However, if you are of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — a healthy BMI starts at 18.5 but should aim for 22.9 or below due to increased health risks at higher BMI levels for these populations.
The BMI categories used in NHS guidance are:
- Underweight: BMI below 18.5
- Healthy weight: BMI 18.5–24.9
- Overweight: BMI 25–29.9
- Obese (Class I): BMI 30–34.9
- Obese (Class II): BMI 35–39.9
- Severely obese (Class III): BMI 40 and above
Use our free BMI calculator above to find your personal BMI instantly — it accounts for your exact height and weight and gives you your category according to NHS guidelines.
Clinically BackedWeight Loss
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.
UK Health Resources and Tools for Weight Management
Beyond BMI, the NHS also recommends measuring waist circumference as an important health indicator. For men, a waist over 94 cm (37 inches) indicates increased risk; over 102 cm (40 inches) indicates high risk. For women, increased risk starts at 80 cm (31.5 inches) and high risk at 88 cm (34.5 inches).
MyWeightCheck provides free tools to help you understand your health metrics in UK measurements. Our weight converter instantly switches between kg, stone, and pounds — useful if you need to understand weight in different units. If you're interested in weight management, try our GLP-1 weight loss calculator to explore evidence-based options. Track changes over time using our free progress tracker, and always discuss any health concerns with your GP.
- 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 healthy weight range for my height in the UK?
Your healthy weight range depends on your exact height. Use our free BMI calculator above to enter your height and see the healthy weight range for you according to NHS guidelines. As a rough guide, healthy BMI is 18.5–24.9 for most adults, or 18.5–22.9 for South Asian, Chinese, Black African, or Black Caribbean adults.
How do I convert my weight from kg to stone?
One kilogram equals 0.157 stone. To convert, divide your weight in kg by 6.35. For example, 70 kg ÷ 6.35 = 11.03 stone (or 11 stone 0.4 lbs). Use our free weight converter on this page for instant conversions between kg, stone, and pounds.
Is BMI the only way to check if my weight is healthy?
BMI is a useful screening tool but has limitations — it does not distinguish between muscle and fat, and does not account for where fat is stored. The NHS recommends also measuring waist circumference. Age, ethnicity, and individual health conditions also matter. Your GP can give personalised advice about healthy weight for you.
What should I do if my BMI is outside the healthy range?
If your BMI is outside the NHS healthy range, speak to your GP. They can discuss your individual health, assess risk factors, and recommend support — which might include diet and exercise advice, structured weight management programmes, or in some cases, specialist services or medication options.
Are height and weight charts the same for men and women?
No — healthy BMI ranges are the same for both men and women, but healthy weight in kg or stone will differ based on height. Women on average are shorter than men, so healthy weights vary. Use our BMI calculator with your individual height and weight for an accurate result specific to you.
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.