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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Weight According to Height Chart — UK Health Guide
Your healthy weight depends on your height, age, and body composition — there's no single "ideal" weight for everyone. The NHS uses BMI (Body Mass Index) combined with height to determine whether a weight falls into a healthy range. This guide explains how to find your healthy weight according to height, using UK measurements and NHS health guidance, plus practical tools to assess your personal weight management goals.
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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 Affects Healthy Weight Range
Taller people naturally weigh more than shorter people because they have greater muscle and bone mass. The NHS healthy weight range uses BMI categories to account for this difference. A healthy BMI is between 18.5 and 24.9 for most UK adults. To find your healthy weight range for your height, multiply your height in metres squared by 18.5 (lower bound) and 24.9 (upper bound). For example, at 1.73m (5ft 8in), a healthy weight range is approximately 55–75 kg (8st 10lbs to 11st 10lbs). Use our free BMI calculator above to enter your height and current weight instantly. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower thresholds (18.5 to 22.9) because these groups face higher health risks at the same BMI levels.
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.
Healthy Weight Ranges by Height (UK Context)
The following shows approximate healthy weight ranges for common UK heights:
- 5ft 2in (157cm): 47–63 kg (7st 6lbs to 9st 13lbs)
- 5ft 5in (165cm): 50–67 kg (7st 12lbs to 10st 7lbs)
- 5ft 8in (173cm): 55–75 kg (8st 10lbs to 11st 10lbs)
- 5ft 10in (178cm): 58–78 kg (9st 2lbs to 12st 4lbs)
- 6ft (183cm): 62–84 kg (9st 11lbs to 13st 3lbs)
These ranges are based on healthy BMI thresholds. Your GP can help you determine what weight range is appropriate for your individual circumstances. Use our free weight converter to switch between kg, stone, and lbs instantly.
- 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's the healthy weight for someone who is 5ft 6in tall?
At 5ft 6in (168cm), a healthy BMI weight range is approximately 52–70 kg (8st 3lbs to 11st 0lbs) according to NHS guidelines. This accounts for natural variation in body composition. Use our BMI calculator above to check where your current weight falls within this range.
Does BMI tell the whole story about healthy weight?
BMI is a useful screening tool but has limitations. It doesn't distinguish between muscle and fat — athletes may have high BMI but low body fat. Waist circumference is also important (for men: over 102cm indicates high risk; for women: over 88cm). Your GP can assess your individual health alongside BMI.
Is there a weight chart that works for all ages?
Adult BMI categories (18.5–24.9 healthy) apply from age 18 onwards. Children use age and sex-specific centile charts instead — adult categories don't apply. If you're concerned about a child's weight, ask your GP or health visitor for personalised guidance.
Why do some height and weight charts give different ranges?
Different charts may use slightly different BMI thresholds or include factors like frame size or ethnicity. The NHS BMI categories are the standard UK reference. For ethnicity-adjusted thresholds, the NHS recognises lower healthy ranges for South Asian, Chinese, Black African, and Black Caribbean adults.
Can I lose weight healthily at any weight?
The NHS recommends losing 0.5–1 kg per week for sustainable results. Even a 5–10% reduction in body weight can improve health markers like blood pressure and blood sugar. Your GP or a weight management service can advise on safe approaches tailored to your circumstances.
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.