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
What Is a Healthy Weight for Your Height?
Your ideal weight depends on your height, age, gender, and muscle mass — there is no single "correct" weight. The NHS uses BMI (body mass index) as the primary screening tool to determine if a weight is healthy for a given height. A healthy BMI falls between 18.5 and 24.9 for most adults, though lower thresholds apply for South Asian, Chinese, Black African, and Black Caribbean populations. Use our free BMI calculator above to check where you fall, or explore healthy weight ranges for your height below.
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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 Ranges by Height (UK Measurements)
The table below shows the healthy weight range for different heights according to NHS BMI guidance (18.5–24.9 BMI for general population):
- 5ft 0in (152cm): 45–57kg (7st 1lb – 8st 13lb)
- 5ft 4in (163cm): 51–65kg (8st 0lb – 10st 3lb)
- 5ft 6in (168cm): 55–70kg (8st 9lb – 11st 0lb)
- 5ft 8in (173cm): 59–75kg (9st 4lb – 11st 11lb)
- 5ft 10in (178cm): 64–81kg (10st 1lb – 12st 10lb)
- 6ft 0in (183cm): 69–87kg (10st 12lb – 13st 8lb)
These ranges represent a healthy BMI for the general UK adult population. Convert your own height and weight using our free weight converter to find your personal healthy range.
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.
Factors Beyond Height and Weight
BMI is useful for population screening but has important limitations. Muscle weighs more than fat — athletes may have a high BMI but low body fat. Age, genetics, ethnicity, and where fat is stored also matter. The NHS recommends checking waist circumference alongside BMI: men above 102cm (40in) and women above 88cm (34.5in) face increased health risk, regardless of BMI. For personalised guidance, speak to your GP. Use our BMI calculator and weight converter tools above to assess your current position within UK health guidance.
- 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 ideal weight for a 5ft 6in woman?
For a 5ft 6in (168cm) woman, a healthy weight range is approximately 55–70kg (8st 9lb – 11st 0lb) according to NHS BMI guidance (18.5–24.9). However, ideal weight also depends on age, muscle mass, and overall health. Use the BMI calculator on this page to find your personal healthy range.
How do I know if my weight is healthy for my height?
Calculate your BMI using the free calculator above. A BMI of 18.5–24.9 is considered healthy by the NHS for general populations, though lower thresholds (18.5–22.9) apply for South Asian, Chinese, Black African, and Black Caribbean adults. Your GP can also assess your individual health context.
Does muscle affect what my ideal weight should be?
Yes — muscle is denser than fat, so very muscular individuals (such as athletes) may have a high BMI but low body fat percentage. BMI is a useful screening tool but does not distinguish between muscle and fat. Body composition, waist circumference, and overall fitness are equally important to consider.
What if my BMI is in the overweight range — should I lose weight?
A BMI of 25–29.9 is classified as overweight by the NHS. However, even modest weight loss (5–10% of body weight) can reduce health risks including high blood pressure and type 2 diabetes. Speak to your GP about whether weight loss is appropriate for your individual health situation.
Are healthy weight ranges different for different ethnicities?
Yes. The NHS recommends lower BMI thresholds for South Asian, Chinese, Black African, and Black Caribbean populations (18.5–22.9) because these groups have higher cardiovascular and diabetes risk at the same BMI level as the general population. Your GP can discuss which guidance applies 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.