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 5ft 6in in metres?
5ft 6in (five feet six inches) converts to 1.68 metres. This is a straightforward height conversion using the standard imperial to metric formula. If you're checking your height for health purposes — such as calculating your BMI or assessing whether you're at a healthy weight — knowing your exact height in metres is essential. The NHS uses metric measurements for clinical health assessments, so converting your height to metres helps you use health tools accurately. Use our free BMI calculator above to find your personal BMI using your height in metres and your current weight.
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.
Height Conversion Formula and Context
To convert feet and inches to metres, use this straightforward formula: divide the total inches by 39.37 (the number of inches in one metre). 5ft 6in = 66 inches ÷ 39.37 = 1.6764 metres (rounded to 1.68m).
- 1 foot = 0.3048 metres
- 1 inch = 0.0254 metres
- 5 feet = 1.524 metres
- 6 inches = 0.1524 metres
- Total: 1.524 + 0.1524 = 1.6764 metres
At 1.68m, you're slightly above average height for UK women (approximately 161.6cm) and below average for UK men (approximately 175.3cm). For NHS health guidance, height in metres is used alongside weight in kilograms to calculate your BMI — a key health screening measurement.
Clinically BackedWeight Loss
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.
Using Your Height for BMI and Health Assessments
Once you know your height in metres (1.68m), you can calculate your BMI using the formula: weight in kg ÷ height in metres squared. For example, at 1.68m, a healthy weight range (BMI 18.5–24.9) is approximately 52–70 kg (8st 3lbs to 11st 0lbs). Use our free weight converter above to switch between kg, stone, and pounds for UK measurements.
The NHS also considers waist circumference alongside BMI — for women, a healthy waist measurement is below 80cm (31.5 inches). If you're tracking your health or weight, knowing your exact height and using our free BMI calculator above ensures you get an accurate personal assessment of your health risk category.
- 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 do I convert 5ft 6in to cm instead of metres?
5ft 6in = 66 inches. Multiply by 2.54 (the conversion factor): 66 × 2.54 = 167.64cm, which rounds to 168cm. This is useful if you're checking height on NHS health charts or using clinical measurement tools that display in centimetres.
Is 5ft 6in considered average height in the UK?
For UK women, 5ft 6in is slightly above average (average is approximately 5ft 3.5in / 161cm). For UK men, it is below average (average is approximately 5ft 9in / 175cm). Height varies significantly by age, region, and ethnicity.
What's my healthy weight at 5ft 6in?
At 1.68m, a healthy BMI range (18.5–24.9) corresponds to approximately 52–70kg (8st 3lbs to 11st 0lbs). However, healthy weight also depends on age, muscle mass, and individual health factors. Use our free BMI calculator above for your personal assessment.
Why does the NHS use metres instead of feet and inches?
The NHS uses metric measurements (metres, kilograms) because they align with international clinical standards and simplify calculations. Most health tools, medication dosing, and clinical guidelines globally use metric units, making it essential to convert your height and weight.
Can I use 1.68m to check my health on NHS tools?
Yes, absolutely. Most NHS health calculators and weight management tools require height in centimetres or metres. At 5ft 6in, use 168cm or 1.68m on NHS health guides, BMI calculators, and weight loss resources.
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.