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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66 Kg To Stones And Pounds — What's Your BMI?
66 kg converts to 10 stone 5 pounds (or 145.5 lbs). However, your BMI depends entirely on your height — the same weight gives very different BMI values for different people. Use our free BMI calculator above to check your personal BMI instantly based on your exact height and weight. We've also provided example BMI values at common heights below to help you understand where 66 kg sits on the NHS health scale.
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.
66 Kg BMI At Different Heights
At a weight of 66 kg, your BMI varies significantly depending on your height. Here are typical examples using the standard BMI formula:
- At 5ft 0in (152 cm): BMI of 28.6 — overweight category
- At 5ft 4in (163 cm): BMI of 24.2 — healthy weight category
- At 5ft 8in (173 cm): BMI of 22.0 — healthy weight category
- At 5ft 10in (178 cm): BMI of 20.9 — healthy weight category
- At 6ft 0in (183 cm): BMI of 19.8 — healthy weight category
These examples show how height dramatically changes what the same weight means for your health. To convert 66 kg to stone using the standard metric to imperial weight conversion, divide by 6.35 — which gives you 10 stone 5 pounds. Try the weight converter on this page to confirm your personal measurement.
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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.
NHS BMI Categories & Weight Guidance
The NHS categorises BMI into five ranges to help assess health risk. A BMI below 18.5 is underweight, 18.5 to 24.9 is healthy weight, 25.0 to 29.9 is overweight, 30.0 to 34.9 is obese (Class I), and 35.0 and above is severely obese (Class II). At 66 kg, whether you're in the overweight or healthy category depends entirely on your height — shorter individuals will have higher BMI values, while taller individuals will have lower BMI values at the same weight. It's important to remember that BMI has limitations: it doesn't distinguish between muscle and fat, doesn't account for where fat is stored, and may be less accurate for elderly adults or very muscular individuals. Always ask your GP for personalised health advice based on your complete health picture, not BMI alone.
- 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 66 kg in stones and pounds?
66 kg equals exactly 10 stone 5 pounds (or 145.5 lbs). To convert any kilogram to stone conversion, divide the kg amount by 6.35. Since 1 stone equals 14 pounds, you can also express this as approximately 10.4 stones if you prefer a single decimal figure.
Is 66 kg a healthy weight?
Whether 66 kg is healthy depends entirely on your height. At 5ft 4in or taller, 66 kg typically falls within the healthy weight range (BMI 18.5–24.9). At shorter heights, it may fall into the overweight category. Use our free BMI calculator above to check your specific BMI based on your actual height.
What's my BMI at 66 kg and 5ft 8in?
At 5ft 8in (173 cm) and 66 kg, your BMI would be approximately 22.0, which falls in the healthy weight category according to NHS guidelines. However, BMI is just one health indicator — your GP can give you more personalised health advice considering your complete health picture.
How do I use the weight converter for 66 kg?
Our free weight converter on this page instantly converts between kg, stone, and pounds. Simply enter 66 kg and it will show you the equivalent in stones and pounds, plus calculate your BMI if you add your height. It's a quick way to check any weight conversion in UK measurements.
What if I'm a different ethnicity — does BMI change?
Yes. The NHS recommends lower BMI thresholds for people of South Asian, Chinese, Black African, or Black Caribbean heritage due to higher cardiovascular and diabetes risk at the same BMI. At these lower thresholds, 66 kg may indicate overweight status at shorter heights. Discuss your individual risk with your GP.
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.