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 Simulator — Explore Healthy Weights for Your Height
A height weight simulator helps you understand what weight range is healthy for your specific height according to NHS guidance. Whether you're curious about your ideal weight, want to check if you're in a healthy range, or are planning weight management changes, exploring the relationship between your height and weight is an important first step. This UK health guide walks you through how to use simulation tools, understand NHS weight categories, and access practical calculators to support your health journey.
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 Height and Weight Relate to UK Health Guidance
Your height and weight together determine your BMI (body mass index), which the NHS uses to assess whether you're in a healthy weight range. For example, the same weight can represent very different health profiles depending on height — a person who is 5ft 8in will have a different BMI at 70kg than someone who is 6ft 2in. This is why height weight simulators are valuable: they let you explore multiple scenarios and understand how your individual measurements fit NHS health guidance. The NHS recommends a healthy BMI between 18.5 and 24.9 for most UK adults, though lower thresholds apply for those of South Asian, Chinese, Black African, or Black Caribbean heritage. By simulating different weights at your height, you can identify your healthy weight range and see the gap between your current weight and NHS targets. This knowledge supports informed decisions about weight management and health planning. Our free BMI calculator above can instantly show you where you stand relative to NHS guidelines.
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.
Using a Simulator to Plan Weight Management in the UK
A height weight simulator is particularly useful if you're considering weight management options, including lifestyle changes, dietary approaches, or prescription weight loss medication like Mounjaro or Wegovy. By projecting different weight scenarios at your height, you can set realistic targets aligned with NHS guidance and understand the health benefits of incremental progress. You don't need to reach an "ideal" weight overnight — even a 5–10% reduction in body weight delivers measurable health improvements. Our GLP-1 weight loss calculator can help you project potential outcomes if you're exploring prescription weight loss support, while our weight converter lets you switch between kg, stone, and lbs to match how you naturally think about weight. Your GP can provide personalised advice about what your height and weight mean for your individual health and which approaches are right for you.
- 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 does a height weight simulator actually do?
A height weight simulator lets you input your height and explore different weight scenarios to see how they affect your BMI and health category according to NHS guidelines. You can test different weights to find your healthy range, understand where you currently sit, and plan realistic weight management targets.
What's the healthy weight range for my height in the UK?
Your healthy weight range depends on your height and is defined by a BMI of 18.5–24.9 according to NHS guidance. Use our free BMI calculator on this page to find your personal healthy weight range instantly. For South Asian, Chinese, Black African, or Black Caribbean adults, lower thresholds apply — your GP can advise.
How accurate is a height weight simulator?
A simulator is highly accurate for calculating BMI and identifying health categories based on your height and weight measurements. However, BMI has limitations — it doesn't account for muscle mass, bone density, or where fat is stored. Waist circumference and overall health context matter too. Your GP can provide a full health assessment.
Can I use a simulator to plan weight loss?
Yes. By exploring different weight scenarios at your height, you can set realistic targets and understand potential health benefits. If you're considering weight loss medication, our GLP-1 weight loss calculator can project potential outcomes. Always discuss your goals with your GP or a healthcare professional first.
Where do I find a reliable height weight simulator in the UK?
MyWeightCheck provides free UK-aligned tools including a BMI calculator, weight converter, and GLP-1 weight loss calculator — all designed for UK measurements and NHS guidance. These work together to give you a complete picture of your height, weight, and health context.
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.