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 and Weight Converter — Convert Between UK and Metric Measurements
Converting between height and weight measurements is essential for understanding your health data in the UK. Whether you need to convert centimetres to feet and inches, kilograms to stone, or check where your measurements fall on the NHS health scale, our free height and weight converter makes it simple. UK adults typically use stone and pounds for body weight, whilst healthcare professionals use kilograms. Understanding both systems helps you track your progress and communicate effectively with your GP about your weight management goals.
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 Use the Height and Weight Converter
Our free converter on this page instantly translates your measurements between metric (kg, cm) and imperial (stone, lbs, feet and inches) units. Simply enter your current measurements and the tool calculates the equivalent values in all three weight systems and height formats.
- Height conversion: 163cm equals 5ft 4in; 178cm equals 5ft 10in
- Weight conversion: 70kg equals 11 stone (or 154.3 lbs)
- UK health guidance: Once you have your measurements, use our free BMI calculator above to check where you fall on the NHS healthy weight range
This is particularly useful for tracking weight loss progress, understanding NHS health thresholds, or comparing your measurements across different UK and international health resources. The converter works both ways — you can enter metric or imperial and get gradual improvement in all formats.
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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.
Why Height and Weight Matter for Your Health
Your height and weight together determine your Body Mass Index (BMI), the primary NHS screening tool for healthy weight status. BMI helps identify whether you're in a healthy range or if weight management might benefit your health. However, BMI alone doesn't tell the complete story — waist circumference and overall fitness also matter.
Understanding your measurements in both metric and imperial units is especially important in the UK, where health services use kilograms and centimetres but many people think in stone and pounds. This dual understanding helps you engage better with your GP during consultations, track your progress more accurately, and make informed decisions about weight management options including lifestyle changes or prescription treatments where appropriate.
- 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 the difference between stone and kilograms?
Stone is an imperial unit used primarily in the UK; 1 stone equals exactly 6.35 kg. Most UK adults prefer stone for personal weight tracking, whilst the NHS and healthcare professionals use kilograms for clinical measurements. Our weight converter above translates instantly between both systems.
How do I convert my height from centimetres to feet and inches?
Divide centimetres by 30.48 to get feet and inches. For example, 173cm equals approximately 5ft 8in. Our height converter above does this calculation instantly. The NHS uses centimetres clinically, but many UK people prefer feet and inches for personal reference.
What should my height and weight be?
A healthy weight depends on your height, age, sex, and muscle mass. Use our free BMI calculator above with your measurements — it will show you the healthy weight range for your height according to NHS guidelines. Your GP can also provide personalised advice based on your individual health.
How is BMI calculated from height and weight?
BMI equals your weight in kilograms divided by your height in metres squared. For example, at 173cm tall, a weight of 70kg gives a BMI of approximately 23.4, which falls in the healthy range. Our BMI calculator above computes this instantly and shows you where you stand on the NHS scale.
Can I use a height and weight converter for children?
Height and weight conversions work the same way for children, but BMI categories are different — children use age and sex-specific centile charts, not adult BMI ranges. For children's health assessments, always consult your GP or use NHS-approved children's health tools rather than adult calculators.
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.