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
How Much Should You Weigh For Your Height?
Your healthy weight depends on your height, age, and individual factors like muscle mass and frame size. According to NHS guidelines, a healthy weight for your height falls within a BMI (Body Mass Index) range of 18.5 to 24.9. Rather than a single "ideal" number, you have a healthy weight range that accounts for natural variation in body composition. Our free BMI calculator above can help you find your personal healthy weight range instantly based on your height and current weight.
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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.
Healthy Weight Range by Height (UK Measurements)
The healthy weight range for your height is calculated using a BMI of 18.5–24.9, which the NHS recognises as a healthy weight for adults. Below is a practical reference table showing healthy weight ranges for common UK heights in both stone and kilograms.
- 5ft 0in (152cm): 7st 7lbs – 9st 10lbs (48–62kg)
- 5ft 4in (163cm): 8st 8lbs – 11st 0lbs (55–70kg)
- 5ft 6in (168cm): 8st 13lbs – 11st 8lbs (57–74kg)
- 5ft 8in (173cm): 9st 5lbs – 12st 1lbs (59–77kg)
- 5ft 10in (178cm): 9st 12lbs – 12st 10lbs (62–81kg)
- 6ft 0in (183cm): 10st 7lbs – 13st 7lbs (67–86kg)
These ranges apply to most UK adults. Use our weight converter above to switch between kg, stone, and pounds for your specific height.
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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.
Individual Factors That Affect Your Ideal Weight
Your healthy weight isn't one fixed number. Several factors influence what weight is right for you, beyond just height. Muscle tissue weighs more than fat, so muscular or athletic individuals may have a higher healthy weight. Frame size also matters — larger-framed people naturally weigh more at the same height. Age plays a role too; metabolism slows with age, affecting weight management. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher health risks at lower weights.
Rather than chasing a single "ideal" weight, focus on feeling healthy and strong. A GP or registered dietitian can provide personalised guidance for your individual circumstances, taking into account your family history, fitness level, and health goals.
- 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 NHS definition of a healthy weight?
The NHS defines a healthy weight as a BMI between 18.5 and 24.9 for most UK adults. Your GP can help determine if your weight is healthy for you based on your individual health factors, not just BMI alone.
How do I calculate my healthy weight range?
Use our free BMI calculator on this page to enter your height and current weight — it will instantly show you your BMI and healthy weight range. Alternatively, multiply your height in metres squared by 18.5 (lower bound) and 24.9 (upper bound) to find your range in kg.
Does healthy weight differ for South Asian or Black British adults?
Yes. The NHS recommends lower BMI thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage because these groups have higher cardiovascular and diabetes risks at lower weights. A GP can explain thresholds specific to your background.
Is BMI the only measure of healthy weight?
No. BMI is a useful screening tool but doesn't account for muscle mass, body composition, or where fat is stored. Waist circumference, fitness level, and overall health markers matter too. Your GP can assess your weight holistically.
Should I aim for the lower or upper end of my healthy weight range?
There's no right answer — both ends of the healthy BMI range are equally valid. Factors like your natural body composition, muscle mass, age, and how you feel influence where within the range is best for you. A healthcare professional can help guide 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.