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
Convert 17.7 Inches to Centimetres
17.7 inches is equal to 44.958 centimetres (or approximately 45 cm). This is a straightforward unit conversion commonly used in UK health contexts, particularly when discussing height measurements for BMI calculations, health assessments, and NHS guidance. Whether you're converting for personal health records or understanding medical measurements, understanding both imperial and metric units helps you engage with UK health information more effectively.
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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 to Convert Inches to Centimetres
The conversion from inches to centimetres uses a simple formula: multiply the number of inches by 2.54. So for 17.7 inches: 17.7 × 2.54 = 44.958 cm. This is the standard international conversion factor used in scientific, medical, and everyday contexts across the UK.
- 1 inch = exactly 2.54 centimetres
- 17.7 inches = 44.958 cm (or 45 cm rounded)
- Useful for height conversions in health and fitness contexts
When assessing healthy weight using a BMI calculator, your height in both centimetres and feet/inches is important. Our free BMI calculator accepts both metric and imperial measurements, so you can input your height however is most familiar to you.
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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 Measurement Matters for UK Health
Height is a key measurement for calculating BMI, which the NHS uses to assess whether weight falls within a healthy range. Accurate height measurement — whether in inches, centimetres, or feet — ensures your BMI calculation is correct and gives reliable health context.
- BMI requires precise height measurement for accuracy
- NHS health assessments use centimetres as the standard metric
- Converting between units ensures consistency in health records
Use our free weight converter and BMI calculator above to check your personal measurements and see how your height relates to healthy weight ranges for your age and sex according to NHS 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.
What is 17.7 inches in centimetres exactly?
17.7 inches equals 44.958 centimetres, or approximately 45 cm when rounded. This is calculated using the standard conversion factor of 1 inch = 2.54 cm. This precision is useful in medical and health contexts where accurate measurements matter for BMI calculations and health assessments.
Why do we use both inches and centimetres in the UK?
The UK uses both metric (centimetres, kilograms) and imperial (inches, pounds, stone) measurements in everyday life. Whilst the NHS primarily uses metric units for clinical records, many UK adults are more familiar with imperial measurements for height and weight, so understanding both systems is practical and helpful.
How does height measurement affect BMI calculation?
Height is essential for BMI calculation. The BMI formula divides weight by height squared, so small errors in height measurement can affect the final BMI result. Whether you measure in centimetres or inches, accuracy is important — our free BMI calculator accepts both units to ensure your calculation is reliable.
What's the difference between 17.7 inches and other height measurements?
17.7 inches is relatively short — roughly equivalent to 5 feet 10 inches when paired with other measurements. In BMI contexts, what matters is your full height. Our BMI calculator helps you understand what a healthy weight range is for your specific height, whether measured in inches, centimetres, feet, or metres.
Can I use centimetres for NHS health appointments?
Yes, the NHS uses centimetres as the standard measurement unit for health records and clinical assessments. Your GP or healthcare provider will typically record your height in centimetres, which is then used for calculating BMI and assessing your health risk factors. Both metric and imperial are acceptable — the important thing is accuracy.
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.