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 118 Inches in Centimetres?
118 inches equals 299.72 centimetres (or approximately 300 cm). This is an exceptionally tall height — significantly above the average UK adult. To convert inches to centimetres, multiply the number of inches by 2.54. Our free weight converter above makes it easy to switch between imperial and metric measurements instantly. If you're checking your height for health reasons, understanding your measurements in both units is helpful for NHS health guidance and personal health tracking.
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 118 Inches to Centimetres
The conversion formula is straightforward:
- 1 inch = 2.54 centimetres
- 118 inches × 2.54 = 299.72 cm
So 118 inches = 299.72 cm (or approximately 300 cm).
For context, the average UK adult male height is around 175 cm (5ft 9in) and the average UK adult female height is around 162 cm (5ft 4in). At 299.72 cm, this height is well above typical adult range and may warrant medical review if this is a personal measurement. Use our free BMI calculator above to understand how height relates to healthy weight ranges — BMI depends on both height and weight together.
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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.
Height, Weight, and Health Context
Height is one of two key measurements used to calculate BMI (body mass index), which is used in NHS guidance to assess whether a person's weight is healthy for their height. If you know your height in inches and want to find your healthy weight range, you can convert your height to centimetres, then use the NHS BMI categories to identify the weight range that's appropriate for you.
Remember that BMI has limitations — it doesn't distinguish between muscle and fat. NHS health guidance also recommends measuring waist circumference for a fuller picture of health risk. If you have concerns about your height or weight, speak with your GP for personalised advice.
- 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 many centimetres is 118 inches?
118 inches equals 299.72 centimetres (approximately 300 cm). To calculate this, multiply 118 by 2.54. This is an exceptionally tall height, well above the UK average adult height.
What's the difference between inches and centimetres?
Inches are an imperial unit of measurement used in the UK and US. Centimetres are metric units used internationally. One inch = 2.54 cm exactly. The UK uses both systems — height is often stated in feet and inches, but medical records use centimetres.
Is 118 inches a typical adult height?
No. 118 inches (300 cm) is far above typical adult height. The average UK adult male is around 175 cm (5ft 9in). This measurement may warrant medical evaluation if it represents an actual height.
How do I use my height to calculate BMI?
First, convert your height to metres. Then use the formula: weight (kg) ÷ height (m)². Use our free BMI calculator on this page to calculate yours instantly — it works with both metric and imperial measurements.
Why do I need to know my height in both inches and centimetres?
The UK uses both measurement systems. Your GP may use centimetres in medical records, while you might naturally think in feet and inches. Having both measurements helps with health tracking, NHS guidance, and using online health calculators effectively.
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.