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 10.4 inches in centimetres?
10.4 inches is equal to 26.42 centimetres. This simple conversion is useful when understanding UK health information, medical measurements, or body dimensions referenced in different units. Whether you're checking height, waist circumference, or other body measurements for NHS guidance, having both metric and imperial measurements helps you interpret your health data accurately. Our free weight converter above makes it easy to switch between different measurement systems whenever you need to.
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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.
Inches to Centimetres Conversion Formula
The conversion between inches and centimetres is straightforward: 1 inch equals exactly 2.54 centimetres. To convert any measurement in inches to centimetres, simply multiply the number of inches by 2.54.
- 10.4 inches × 2.54 = 26.42 cm
- This calculation is the international standard used by NHS guidance and medical professionals across the UK
- Centimetres are part of the metric system, which the NHS uses for clinical measurements
- Inches are still commonly used in the UK for height and some body measurements
This conversion is particularly useful when cross-referencing body measurements with NHS health thresholds, which often use metric units for waist circumference and other clinical assessments.
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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.
Common Height and Body Measurements in Both Units
Many UK health measurements use mixed units. For context, 5 feet 4 inches (a common height in the UK) equals approximately 163 centimetres. Waist circumference thresholds recommended by NHS guidelines are also typically given in centimetres.
- Healthy waist circumference: under 80 cm for women, under 94 cm for men
- Increased health risk: 80–88 cm for women, 94–102 cm for men
- High health risk: over 88 cm for women, over 102 cm for men
Understanding measurements in both units ensures you can accurately interpret your health data and follow NHS health advice, whether reading UK health information or international guidance.
- 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.
Why do I need to know measurements in both inches and centimetres?
The UK uses both systems — inches and feet for height and some measurements, whilst the NHS uses centimetres for clinical data. Being able to convert between them helps you interpret health information from different sources accurately and follow NHS guidance properly.
Is 10.4 inches a common body measurement?
10.4 inches (26.42 cm) is not a standard height measurement but could represent a waist measurement, chest measurement, or other body dimension. For NHS health context, waist circumference is an important indicator of health risk alongside BMI.
Can I use this conversion for medical measurements?
Yes, this conversion is accurate for all purposes including medical measurements. However, for clinical assessments, always confirm measurements with your GP or healthcare professional, as they will have the precise tools and context.
How do I convert larger measurements from inches to centimetres?
Use the same method: multiply any inches value by 2.54. For example, 6 feet (72 inches) × 2.54 = 182.88 cm. Our weight converter above can also help with body measurement conversions.
Why does the UK use both metric and imperial measurements?
The UK is transitioning to metric but historically used imperial units. Today, healthcare uses metric (centimetres, kilograms), whilst everyday speech still uses inches and stone. Understanding both systems helps you navigate UK health information confidently.
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.