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
Is 66 Kg A Healthy Weight? Convert To Stones And Pounds
66 kg is equivalent to 10 stone 5.3 pounds (or approximately 10 stone 5 lbs). Whether this weight is healthy for you depends entirely on your height. A weight that is healthy for someone 5ft 10in tall would be overweight for someone 5ft 2in. This guide shows you how to determine if 66kg is a healthy weight for your specific height using NHS guidelines, and explains what to do if you're concerned about your weight. Use our free BMI calculator above to check your personal BMI instantly.
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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.
Healthy Weight Ranges At Different Heights
66 kg falls in different BMI categories depending on your height. Here are three real examples showing how the same weight produces different health outcomes:
- At 5ft 2in (158cm): 66kg = BMI 26.5 (overweight range) — above the healthy 18.5–24.9 threshold
- At 5ft 6in (168cm): 66kg = BMI 23.8 (healthy weight) — comfortably within the NHS healthy range
- At 5ft 10in (178cm): 66kg = BMI 21.5 (healthy weight) — well within the healthy range
To convert 66kg to stone using the standard kg to stone conversion, divide by 6.35029 — giving 10.4 stone (10 stone 5.6 lbs). The key message is that height matters far more than the absolute number on the scales. Use our free weight converter to check how 66kg compares in your preferred metric, then calculate your personal BMI using your actual height.
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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 Guidance: Is Your Weight Healthy?
According to NHS guidelines, a healthy BMI for most UK adults is between 18.5 and 24.9. However, for adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply (18.5–22.9), as these groups face higher health risks at the same weight. A healthy weight also depends on waist circumference: men should aim for under 94cm (37 inches), women under 80cm (31.5 inches). Even within the healthy BMI range, where your weight sits (around your stomach) affects your health risk. If you're concerned about whether 66kg is right for you, speak to your GP — they can assess your individual health, take family history into account, and discuss whether any lifestyle changes would benefit you.
- 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 66kg in stones and pounds?
66 kg equals 10 stone and 5.3 pounds (often rounded to 10 stone 5 lbs). To convert kilograms to stone manually, divide the kilogram value by 6.35029. Our free weight converter above can do this instantly in both directions.
How do I know if 66kg is a healthy weight for me?
Your healthy weight range depends on your height. Calculate your BMI using our free BMI calculator on this page — enter 66kg and your height. A BMI between 18.5 and 24.9 is considered healthy by the NHS. If you're outside this range, speak to your GP about personalised advice.
What is the healthy weight range for someone 5ft 6in tall?
At 5ft 6in (168cm), the healthy weight range is approximately 53–70kg (8 stone 5 lbs to 11 stone 0 lbs). At this height, 66kg gives a BMI of 23.8, which falls comfortably within the healthy range. Use our BMI calculator to find the exact healthy range for your height.
Does waist measurement matter as much as weight?
Yes — where you carry weight matters for health. The NHS recommends men keep waist circumference under 94cm (37 inches) and women under 80cm (31.5 inches), even at a healthy BMI. Excess weight around the stomach increases cardiovascular risk. Your GP can advise if your waist measurement is a concern.
What should I do if 66kg is outside my healthy weight range?
If your BMI is higher or lower than the healthy range, speak to your GP first. They can rule out underlying medical conditions affecting weight. Then explore sustainable changes: the NHS recommends losing no more than 0.5–1kg per week. Our progress tracker can help you log changes over time.
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.