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 511 inches in centimetres?
511 inches is equivalent to 1,297.94 centimetres. This is an unusually tall measurement — approximately 10 metres 98 centimetres — which suggests the value may relate to a distance, structure, or other non-human measurement rather than an individual's height. For UK health guidance on height and weight, our BMI calculator and weight converter tools can help you understand your personal health metrics in both metric and imperial measurements.
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.
Understanding height measurements in the UK
In the UK, height is typically measured in feet and inches for everyday purposes, though centimetres (cm) are the standard for NHS health assessments. The conversion from inches to centimetres is straightforward: one inch equals exactly 2.54 cm. To convert any height measurement, multiply the number of inches by 2.54. For practical UK health information, typical adult heights range from around 150 cm (4ft 11in) for shorter adults to 195 cm (6ft 5in) for taller adults. If you're looking to convert a realistic human height, use our free weight converter above to switch between feet, inches, and centimetres instantly. Your GP may ask for your height in centimetres during health assessments, and having this measurement is important for calculating BMI and assessing healthy weight ranges.
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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 matters for health assessment
Height is a key measurement for determining healthy weight ranges and BMI (Body Mass Index) according to NHS guidance. Your height, combined with your weight, gives your GP essential information about your overall health status. Even small differences in height can significantly affect your BMI category — for example, at 70 kg, a height of 165 cm gives a BMI of 25.7 (overweight), whilst the same weight at 175 cm gives a BMI of 22.9 (healthy weight). Use our free BMI calculator on this page to discover how your personal height and weight combine to determine your BMI and what this means for your health. Regular health checks with your GP should include accurate height and weight measurements.
- 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.
How do I convert inches to centimetres?
Multiply the number of inches by 2.54. For example, 70 inches × 2.54 = 177.8 cm. Use our free weight converter above for instant conversions between feet, inches, and centimetres.
Why do UK doctors use centimetres instead of feet and inches?
The NHS uses centimetres because they're part of the metric system, which is more precise for clinical calculations like BMI and medication dosing. Centimetres allow for exact measurements without rounding.
What is an average UK adult height in centimetres?
The average UK adult man is approximately 175 cm (5ft 9in) tall, whilst the average UK adult woman is approximately 162 cm (5ft 4in) tall. Individual heights vary widely and are influenced by genetics, nutrition, and ethnicity.
How does height affect my healthy weight range?
Height directly determines your healthy weight range. Taller people can carry more weight at a healthy BMI. Calculate your personal healthy weight range using our free BMI calculator to see what weight range is appropriate for your specific height.
Is 511 inches a realistic human height?
No — 511 inches (1,297.94 cm or roughly 10.98 metres) is far beyond any possible human height. The tallest person ever recorded was approximately 272 cm (8ft 11in). If you meant a different height, use our converter tool above.
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.