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
MH CM — UK Health Measurement Reference
MH (metres or height) and CM (centimetres) are metric units used in UK NHS health assessments to calculate BMI, determine healthy weight ranges, and track progress. Understanding these measurements is essential for making sense of UK health guidance. Our BMI calculator uses these units alongside stone and pounds to give you a complete picture of your health status. This UK health guide explains what these measurements mean and how they relate to your wellbeing.
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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 Measurements Work in UK Health Assessment
In UK healthcare, height in centimetres (cm) and weight in kilograms (kg) form the basis of BMI calculation and NHS health guidance. The NHS uses metric measurements for all clinical assessments, though many UK adults prefer to discuss weight in stone and pounds. Height is typically measured in centimetres, ranging from around 150 cm (4ft 11in) to 190 cm (6ft 3in) for adults. Weight measurement in kg allows for precise health risk assessment compared to stone, which can vary slightly between individuals due to rounding.
- Height in cm determines your healthy weight range
- Weight in kg provides the most accurate health assessment
- Combined, these create your BMI — the primary NHS health screening tool
- Metric measurements allow easy comparison with international health data
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 Metric Measurements for Weight Management and Health Planning
Whether you're following NHS weight management guidance or tracking progress with our weight converter and progress tracker, understanding cm and kg measurements is fundamental. Most UK GP surgeries record height in centimetres and weight in kilograms at every appointment, creating a consistent health record. This consistent nhs health advice approach helps your GP identify health trends and recommend appropriate interventions. If you prefer working in stone and pounds — which is completely normal in UK culture — our free tools convert instantly between metric and imperial measurements, helping you bridge the gap between home monitoring and clinical assessment seamlessly.
- 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 MH mean in health measurements?
MH typically refers to metres or height measurement. In UK health assessment, height is usually recorded in centimetres (cm) rather than metres, ranging from about 150 cm to 190 cm for adults. Your height is essential for calculating healthy weight range and BMI according to NHS guidance.
Why does the NHS use metric measurements?
The NHS uses metric (cm and kg) because it's the international standard, enables precise clinical assessment, and allows comparison with global health data. While many UK adults prefer stone and pounds for everyday discussion, metric measurements are more accurate for medical purposes and health risk assessment.
How do I convert my height from feet to centimetres?
Multiply feet by 30.48 and inches by 2.54, then add them together. Alternatively, our free weight converter tool handles this instantly. For example, 5ft 8in equals approximately 173 cm. This conversion is useful when comparing your measurements against NHS health thresholds.
Can I use stone and pounds instead of kg for health assessment?
Yes, absolutely. Many UK adults naturally work in stone and pounds, and that's completely valid for home tracking. However, NHS records use kg for clinical accuracy. Our MyWeightCheck tools allow you to input and track weight in your preferred unit while showing NHS-aligned health context.
How does height in cm affect my healthy weight range?
Your height in centimetres directly determines your healthy weight range according to NHS BMI guidelines. Taller individuals have a higher healthy weight ceiling. For example, at 160 cm, healthy weight is roughly 47–63 kg; at 180 cm, it's roughly 60–80 kg. Use our BMI calculator to find your exact range.
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.