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
Height Weight Visualizer — Understanding Your Measurements
A height weight visualizer helps you see the relationship between your height and weight, making it easier to understand where you fall within healthy weight ranges according to NHS guidance. Whether you're tracking your current status or exploring what a healthy weight looks like for your height, visualizing this connection makes health planning more practical. Our free BMI calculator and weight converter help you find your healthy weight range in stone, kilograms, or pounds — all tailored to UK measurements and NHS health thresholds.
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 Affect Your Health
Your height and weight together determine your BMI (Body Mass Index), which is the primary screening tool used by the NHS to assess whether you're in a healthy weight range. According to NHS guidance, a healthy BMI is between 18.5 and 24.9 for most UK adults, though lower thresholds apply for people of South Asian, Chinese, Black African, or Black Caribbean heritage due to higher health risks at lower BMI levels.
Height and weight combined also influence health conditions like type 2 diabetes, cardiovascular disease, joint strain, and sleep problems. Even modest weight changes can have significant benefits — research shows that losing just 5–10% of your body weight can improve blood pressure, blood sugar control, and cholesterol levels. Use our free BMI calculator above to find your personal BMI instantly, then explore your healthy weight range for your specific height.
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 Height Weight Visualizer for Weight Management
A height weight visualizer makes weight management planning more tangible by showing you exactly where you currently sit and where you're aiming to reach. This visual context is especially helpful when exploring options like lifestyle changes or weight loss approaches. If you're interested in how prescription weight loss medications might fit into your plan, our GLP-1 weight loss calculator can project potential outcomes based on medication type and dose — giving you a realistic picture before discussing options with your GP.
Track your progress over time using our free progress tracker, which lets you log weight changes and see trends. Combined with the weight converter tool to switch between stone, kg, and pounds, you'll have all the information needed for informed conversations with your healthcare team about healthy weight targets for your individual height and health profile.
- 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 a healthy weight for my height according to NHS guidance?
Your healthy weight range depends on your height and body composition. Use our free BMI calculator to find your personal range — NHS recommends a BMI of 18.5–24.9 for most UK adults. If you're of South Asian or Black African heritage, lower thresholds (18.5–22.9) apply due to higher health risks at the same BMI. Your GP can give personalised advice.
How do height and weight affect BMI?
BMI is calculated as weight (kg) divided by height (m) squared. Your height directly impacts your healthy weight range — taller individuals have higher healthy weight ranges. However, BMI has limitations: it doesn't distinguish between muscle and fat, so very muscular people may have a high BMI despite low body fat. Waist circumference is also important.
Can I use a height weight visualizer to check if I'm overweight?
Yes. A visualizer shows where your current weight falls relative to healthy ranges for your height. According to NHS categories, a BMI of 25–29.9 is overweight, 30–34.9 is obese class I. Use our free weight converter and BMI calculator above to find your exact category and healthy weight range for your height.
What should I do if the visualizer shows I'm outside a healthy weight range?
First, consult your GP for personalised guidance tailored to your health history. The NHS recommends sustainable weight loss of 0.5–1 kg per week through reduced-calorie diet and increased physical activity. Your GP can discuss options including structured programmes, behaviour change support, or prescription medication if appropriate for your individual health profile.
How accurate is a height weight visualizer compared to other health measurements?
Height weight visualisers show BMI, which is useful for screening but has limitations — they don't account for muscle mass, age, or where fat is stored. Waist circumference and other measurements give additional insight. Your GP can assess your overall health using multiple measures, not just BMI. Use visualisers as a starting point, not definitive diagnosis.
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.