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 Compared to Weight — What's Healthy for You?
Your height and weight together determine whether you're in a healthy weight range according to NHS guidance. Height is the foundation for calculating BMI, the most common screening tool used in UK health advice. The same weight can be healthy or unhealthy depending on your height — for example, 70kg might be ideal for someone 1.75m tall but overweight for someone 1.60m tall. Understanding how your height and weight relate helps you assess your health status and make informed decisions about weight management.
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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 Work Together
Height and weight are used together to calculate BMI (Body Mass Index), which NHS uses as a screening tool for weight-related health risks. The formula is straightforward: BMI = weight (kg) ÷ height (m)². A healthy BMI range according to NHS guidelines is 18.5 to 24.9 for most UK adults, though lower thresholds apply for people of South Asian, Chinese, Black African, or Black Caribbean heritage (18.5 to 22.9).
Your height acts as the denominator in this calculation, so taller people can carry more weight while maintaining the same BMI as shorter people. For instance, at 1.70m, a healthy weight range is approximately 53–72kg (8st 5lbs to 11st 4lbs). At 1.80m, the healthy range extends to approximately 60–81kg (9st 6lbs to 12st 11lbs). Use our free BMI calculator above to find your personal healthy weight range instantly based on your exact 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.
Using Height and Weight for Weight Management
When considering weight management options — whether through lifestyle changes, dietary adjustments, or prescription support — your height and weight together determine your starting point and eligibility. For example, prescription weight loss medications like Mounjaro or Wegovy are available to UK adults with a BMI of 30 or above, or 27 and above with weight-related health conditions. Your height directly affects which BMI category you fall into, making it essential for assessment.
Beyond BMI, waist circumference is also important: NHS recommends measuring around your natural waist to identify cardiovascular risk, regardless of height. Our free weight converter helps you track your weight across kg, stone, and pounds as you progress. For those exploring weight loss options, our GLP-1 weight loss calculator can project potential outcomes when combined with 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's the healthy weight for my height in the UK?
NHS recommends using your height to calculate a healthy BMI range of 18.5 to 24.9. Use our free BMI calculator above — enter your height and it will show your personalised healthy weight range in both kg and stone. For example, at 5ft 8in (1.73m), healthy weight is approximately 55–74kg (8st 9lbs to 11st 8lbs).
Can the same weight be healthy for two different heights?
Absolutely. The same weight in two people of different heights creates different BMIs. For instance, 75kg might be a healthy BMI for someone 1.80m tall but overweight for someone 1.65m tall. This is why height and weight must always be considered together when assessing health status.
How does height affect weight loss goals?
Your height determines your healthy weight range and BMI category, which guides weight loss targets. Taller individuals naturally have higher healthy weight ranges. Your GP or a prescriber will use your height alongside your current weight to assess whether weight loss support is needed and what approach suits you.
Is waist measurement important as well as height and weight?
Yes. While height and weight calculate BMI, NHS also recommends measuring waist circumference because it indicates where fat is stored. For men, waist over 94cm increases health risk; for women, over 80cm. This provides a fuller picture than height and weight alone.
How can I track my height and weight progress?
Use our free progress tracker to log your weight over time. Our weight converter helps you switch between kg, stone, and pounds, and our BMI calculator shows how your BMI changes as your weight changes — making it easy to see progress towards your healthy weight range for your height.
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.