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 falls within a healthy range for your height. In the UK, we use NHS guidance on healthy weight, which is based on BMI (body mass index) — a measure of your weight relative to your height. This guide explains how to use a height and weight chart, what the numbers mean, and how to find your personal healthy weight range using free UK health information and tools.
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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.
How Height And Weight Charts Work
A height and weight chart shows the relationship between your height and weight to determine if you fall into a healthy weight range. The chart uses BMI (body mass index) — calculated as weight in kilograms divided by height in metres squared. According to NHS guidance, the healthy weight range for most UK adults is a BMI of 18.5 to 24.9.
- BMI 18.5–24.9: Healthy weight
- BMI 25.0–29.9: Overweight
- BMI 30.0 and above: Obese
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — healthy weight starts at BMI 18.5 and overweight begins at BMI 23.0. You can use our free BMI calculator above to find your personal BMI instantly, and the weight converter tool helps you switch between kilograms, stone, and pounds for UK measurements.
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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.
Finding Your Healthy Weight Range By Height
To find your healthy weight range, use your height and the NHS BMI formula. For example, if you're 1.73 metres tall (5ft 8in), your healthy weight range is approximately 55–74 kg (8st 9lbs to 11st 8lbs). The formula is: healthy weight (kg) = 18.5 × height² for the lower range, and 24.9 × height² for the upper range. Remember that weight management involves more than just the numbers — waist circumference, fitness level, and overall health matter too. Work with your GP if you're concerned about your weight, and use our free progress tracker to monitor changes over time. Even a 5–10% reduction in body weight can bring meaningful health benefits.
- 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 someone who is 5ft 6in (168cm)?
At 168cm, a healthy BMI (18.5–24.9) corresponds to approximately 52–70 kg (8st 2lbs to 11st 0lbs). Use our free BMI calculator to check your exact healthy range based on your height and current weight. Individual healthy weight depends on muscle mass, age, and overall fitness.
Why do height and weight charts use BMI?
BMI is the NHS standard for assessing healthy weight because it accounts for both height and weight together. However, BMI has limitations — it doesn't distinguish between muscle and fat, so very muscular people may have a high BMI despite low body fat. Always discuss your personal weight with your GP for context.
Are the healthy weight ranges different for men and women?
No — the BMI healthy weight ranges (18.5–24.9) are the same for all adults regardless of sex. However, body composition naturally differs between men and women, so two people with the same BMI may look different. Your GP can provide personalised guidance.
What if I'm overweight according to a height and weight chart?
If your BMI is 25 or above, your GP can discuss weight management options. This might include lifestyle changes, referral to NHS weight management services, or in some cases, prescription weight loss medication. Even modest weight loss (5–10%) can improve health markers like blood pressure and blood sugar.
Where can I find an official UK height and weight chart?
The NHS provides BMI information on the NHS.uk website. MyWeightCheck offers a free BMI calculator and weight converter for UK adults — use these tools above to check your healthy weight range instantly. Your GP practice also has health screening tools available.
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.