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
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Convert 16.7 Inches To Centimetres
16.7 inches converts to 42.42 cm using the standard conversion formula. In the UK, we typically use centimetres for clinical measurements and medical assessments, while inches are less common in everyday health contexts. Whether you're checking a measurement for health purposes or comparing heights, understanding both metric and imperial units is helpful. This guide explains the conversion and shows you how UK health services use these measurements.
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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 16.7 Inches To Centimetres
The exact conversion from inches to centimetres uses a straightforward formula: multiply the number of inches by 2.54. For 16.7 inches: 16.7 × 2.54 = 42.418 cm, which rounds to 42.42 cm.
This conversion is based on the international standard where 1 inch = 2.54 cm exactly. The NHS and UK healthcare services use centimetres as the standard unit for height, weight, and body measurements. If you're measuring for health purposes—such as calculating BMI or assessing growth—centimetres are what your GP will use. You can use our free weight converter above to switch between different measurement units for height and weight together, making it easy to compare your measurements across systems.
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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.
16.7 Inches In UK Health Context
In UK healthcare, heights are recorded in centimetres or feet and inches, but clinical assessments use metric measurements. A height of 42.42 cm is quite short for an adult—this measurement would typically refer to arm length, torso measurement, or a child's height rather than adult standing height. If you're checking this measurement for BMI or health assessment purposes, use our free BMI calculator on this page to see how your height and weight relate to NHS healthy weight guidelines. Your GP can provide personalised health advice based on your individual measurements and health context.
- 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.
Is 16.7 inches the same as 42.42 cm?
Yes, exactly. 16.7 inches converts to 42.42 centimetres using the standard conversion (inches × 2.54 = cm). This is the precise metric equivalent used by NHS services and healthcare providers across the UK.
Why does the UK use centimetres instead of inches?
The UK adopted the metric system for clinical and official measurements. Healthcare services, including the NHS, use centimetres for all medical records, height measurements, and BMI calculations. Inches remain in casual use but are not standard in medical contexts.
What measurement is 16.7 inches typically used for?
At 42.42 cm, this measurement is too short for adult height. It might represent arm length, a child's measurement, or a specific body part measurement rather than standing height. Always confirm what you're measuring before comparing to health standards.
How do I convert other measurements to centimetres?
Use the same formula: multiply any inch measurement by 2.54. Our free weight converter on this page supports height conversions in both directions, making it easy to switch between imperial and metric units instantly.
Should I use inches or centimetres for health assessments?
Always use centimetres when working with your GP or UK healthcare services. The NHS uses metric measurements exclusively for clinical assessments, BMI calculations, and medical records. This ensures consistency and accuracy in your healthcare.
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.