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 Converter — Find Your Healthy Weight Range
Converting between different weight and height measurements can be confusing, especially when comparing UK stone and pounds against kilograms or centimetres against feet and inches. Our height weight converter makes it simple to translate your measurements into any unit you need, and helps you understand what your weight means for your health according to NHS guidance. Whether you're tracking your weight for health reasons, calculating your BMI, or just need a quick conversion, this guide explains how to convert between the most common UK and metric 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.
How to Convert Height and Weight Measurements
Weight conversions follow these simple formulas: 1 kilogram equals 2.20462 pounds, and 1 stone equals 14 pounds exactly (or 6.35029 kg). To convert kg to stone, divide your weight in kilograms by 6.35029. For example, 70kg ÷ 6.35029 = 11 stone (with the remainder converted to pounds). Height conversions are equally straightforward: 1 centimetre equals 0.3937 inches, or multiply centimetres by 0.3937 to get inches. A height of 173cm, for example, equals 5 feet 8 inches.
Use our free weight converter above to instantly switch between kg, stone, and pounds without doing the maths yourself. Once you've converted your measurements, you can calculate your BMI using the free BMI calculator on this page to see where your weight falls according to NHS health categories.
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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.
Understanding Your Weight in UK Health Context
After converting your height and weight, the next step is understanding what these measurements mean for your health. The NHS provides clear weight categories based on BMI (body mass index), which uses both your height and weight together. A healthy BMI for most UK adults is between 18.5 and 24.9, though lower thresholds apply if you're of South Asian, Chinese, Black African, or Black Caribbean heritage. A modest weight loss of just 5–10% of your body weight can improve blood pressure, reduce type 2 diabetes risk, and enhance overall wellbeing. If you're considering weight management options or want to track progress toward a healthier weight, our free progress tracker helps you log changes over time and stay motivated.
- 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 my height and weight to different measurements?
Use our free height weight converter above to instantly convert between kg, stone, pounds, centimetres, feet, and inches. Simply enter your current measurements and the tool shows equivalents in all common UK and metric units. This is much faster than calculating by hand.
What is a healthy weight for my height according to NHS guidance?
Your healthy weight range depends on your height and is measured using BMI. Use the free BMI calculator on this page to find your personal healthy weight range. For most UK adults, a BMI between 18.5 and 24.9 is healthy. Your GP can also advise on what's healthy for you individually.
Why do UK measurements use stone and pounds instead of kilograms?
Stone and pounds are traditional imperial measurements used in the UK and are still widely preferred by UK adults for body weight. Most UK clothing sizes, diet programmes, and health conversations use stone. However, the NHS uses kilograms for clinical records, which is why having both conversions readily available is helpful.
How does height and weight relate to BMI and health risk?
BMI is calculated using height and weight together to estimate whether your weight is in a healthy range for your height. A higher BMI can indicate increased health risks, but BMI has limitations — it doesn't account for muscle mass or where fat is stored. Your GP can assess your overall health, not just BMI.
Can I use a height weight converter to check if I need weight management treatment?
A converter helps you understand your measurements, but to determine if you're eligible for weight management support, speak to your GP. They'll consider your BMI, any weight-related health conditions, and overall health history to advise whether intervention is appropriate for you.
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.