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 66.6 kg in stone?
66.6 kg is equal to 10 stone and 7.2 pounds (or 10st 7.2lbs). This conversion uses the standard kg to stone calculation, where one stone equals 6.35029 kilograms. At this weight, your BMI depends on your height — use our free BMI calculator above to find out your personal BMI instantly. Understanding your weight in both metric and imperial measurements helps you track health progress using UK standard measurements that many NHS resources and health services use.
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.
Conversion table: weights around 66.6 kg
To convert kilograms to stone, divide the kilogram value by 6.35029. Here's a helpful reference table showing how 66.6kg compares to nearby weights:
- 63 kg = 9st 12.2lbs
- 64.5 kg = 10st 2.3lbs
- 66 kg = 10st 6.3lbs
- 66.6 kg = 10st 7.2lbs
- 67 kg = 10st 8.2lbs
- 68.5 kg = 10st 12.3lbs
- 70 kg = 11st 0.1lbs
You can also use our free weight converter on this page to convert between kg, stone, and pounds instantly for any weight value.
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.
BMI context at 66.6 kg for different heights
At 66.6 kg, your BMI depends entirely on your height. For example: at 5ft 6in (168cm), a weight of 66.6kg gives a BMI of approximately 24.0 — within the healthy weight range. At 5ft 4in (163cm), the same weight gives a BMI of around 25.1 — just into the overweight category. At 5ft 8in (173cm), BMI would be approximately 22.9 — comfortably in the healthy range. The NHS recommends a healthy BMI between 18.5 and 24.9 for most adults. Use our BMI calculator above to find your personal BMI based on your exact height.
- 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 66.6 kg to stone and pounds?
Divide 66.6 by 6.35029 to get stone. 66.6 ÷ 6.35029 = 10.49 stone, which equals 10 stone and 7.2 pounds. You can use our free weight converter above for instant conversions between any kg, stone, and pounds values.
Is 66.6 kg a healthy weight?
Whether 66.6kg is healthy depends on your height and individual health factors. At average UK adult heights (around 5ft 6in), this weight typically falls within or just below the healthy BMI range. Your GP can advise on whether this weight is appropriate for you personally.
What's the formula for converting kg to stone?
The formula is: weight in kg ÷ 6.35029 = weight in stone. So 66.6 kg ÷ 6.35029 = 10.49 stone. To convert stone to kg, multiply: stone × 6.35029 = kg.
How many pounds is 66.6 kg?
66.6 kg equals approximately 146.8 pounds (lbs). The conversion formula is: kg × 2.20462 = lbs. So 66.6 × 2.20462 = 146.8 lbs. This is useful if you need pounds without the stone conversion.
What's the difference between stone and pounds?
One stone equals exactly 14 pounds. Stone is the traditional UK measurement for body weight, whilst pounds is a smaller unit. So 10 stone 7.2 pounds means 10 stones plus 7.2 extra pounds beyond that. Most UK health services use both terms together — "stone and pounds".
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.