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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Height Weight Calculator — Find Your Healthy Weight Range
A height weight calculator helps you quickly determine whether your weight is healthy for your height. Using your height and weight, you can identify your healthy weight range according to NHS guidance. This simple tool considers both metric (kg) and imperial (stone and pounds) measurements, making it easy to understand your health status. Whether you're tracking weight management or simply curious about your numbers, knowing your healthy weight range is an important first step in understanding your overall health.
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.
How to Use Your Height and Weight to Calculate Health Range
Your healthy weight range depends entirely on your height. The NHS uses BMI (Body Mass Index) to determine whether a weight is healthy for a given height. For most UK adults, a healthy BMI falls between 18.5 and 24.9. Using your height and weight together, you can calculate where you sit on the health spectrum.
For example, at 5ft 8in (173cm), the healthy weight range is approximately 55–74kg (8st 8lbs to 11st 9lbs). At 5ft 4in (163cm), the healthy range is roughly 48–64kg (7st 7lbs to 10st 1lbs). Our free BMI calculator above instantly calculates your personal healthy weight range using your exact measurements. You can also use our weight converter to switch between kg, stone, and pounds to see your numbers in your preferred units.
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower thresholds due to increased health risks at the same BMI levels.
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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.
Why Height and Weight Matter Together
Height and weight are only meaningful when considered together. Two people weighing the same may have very different health statuses if they have different heights. This is why BMI combines both measurements into a single health indicator.
A healthy weight at one height might be overweight at a shorter height, and underweight at a taller height. This is why height weight calculators are essential for personalised health assessment. Beyond BMI, your waist circumference also matters—the NHS recommends keeping waist measurement below 94cm (37 inches) for men and 80cm (31.5 inches) for women to reduce cardiovascular risk.
If you're interested in weight management support, our GLP-1 weight loss calculator can estimate potential outcomes if you're considering prescription weight loss options alongside lifestyle changes.
- 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 for my height?
Your healthy weight range depends on your exact height. Use the BMI calculator above with your height and weight to get your personal healthy range. As a guide, a BMI of 18.5–24.9 is healthy for most adults. For South Asian, Chinese, Black African, or Black Caribbean adults, a BMI of 18.5–22.9 is recommended. Your GP can also advise on your ideal weight range.
How do I calculate healthy weight from height?
Multiply your height in metres by itself, then divide your weight in kg by that number to get your BMI. For example: at 1.73m tall, a healthy weight range is roughly 55–74kg. The easiest method is to use our free BMI calculator above—it does the maths instantly for you.
Is BMI the only way to measure if my weight is healthy?
BMI is useful but has limitations. It doesn't distinguish between muscle and fat, so athletes may have a high BMI but be healthy. Waist measurement is equally important—excess belly fat carries higher health risks. Your GP can provide a complete health assessment beyond just height and weight.
What if I'm overweight for my height—what should I do?
If your BMI is 25–29.9 (overweight) or higher, discuss with your GP. Small changes like increased activity and balanced nutrition help. For those with a BMI of 30+ or 27+ with health conditions, your GP may discuss weight management options including lifestyle support or, in some cases, prescription medication.
How accurate is a height weight calculator?
Height weight calculators using BMI are accurate screening tools but don't account for muscle mass, bone density, age, or fat distribution. They're most useful for general health screening. Always discuss your personal health with your GP for tailored advice specific to your circumstances and medical history.
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.