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
66 Kg In Stones And Pounds — Is It A Healthy Weight?
66 kilograms equals 10 stone and 5.5 pounds in UK measurements. Whether this weight is healthy depends entirely on your height. The same weight can be perfectly healthy for one person and overweight for another. Use our free BMI calculator above to check your personal BMI, or continue reading to understand how height, age, and individual factors determine whether 66 kg is a healthy weight for you.
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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 By Height At 66 Kg
At 66 kg, whether your weight falls into the healthy range depends on your height. Here are three real examples showing how the same weight produces different BMI results:
- 5ft 2in (157 cm): BMI of 26.8 — overweight range (healthy range is 18.5–24.9)
- 5ft 6in (168 cm): BMI of 23.4 — healthy weight range
- 5ft 10in (178 cm): BMI of 21.3 — healthy weight range
To convert kilograms to stone, use the standard formula: divide your weight in kg by 6.35. At 66 kg, this gives you 10 stone and 5.5 pounds exactly. The NHS uses BMI to assess whether a weight in stone and pounds is healthy, but BMI alone doesn't tell the whole story — muscle mass, where fat is stored, and your overall health matter too. Try our weight converter above to check your own measurements instantly.
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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 On Healthy Weight And What To Do
According to NHS guidelines, a healthy BMI is 18.5 to 24.9 for most adults. If your BMI at 66 kg falls outside this range, it doesn't mean you're unhealthy — but it may be worth discussing with your GP, especially if you have weight-related health conditions like high blood pressure or type 2 diabetes. Waist measurement also matters: men with waist over 94 cm (37 inches) and women over 80 cm (31.5 inches) have increased health risk, even at a healthy BMI. If you're concerned about your weight, your GP can offer personalised advice, refer you to NHS weight management services, or discuss lifestyle changes that work for your circumstances. Remember, health is individual — focus on how you feel, not just the number on the scale.
- 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.
Is 66 kg a healthy weight?
It depends on your height. At 66 kg, someone who is 5ft 2in would have a BMI of 26.8 (overweight), while someone who is 5ft 6in would have a BMI of 23.4 (healthy). Use our free BMI calculator above to check your personal result based on your exact height.
What is 66 kg in stones and pounds?
66 kg equals 10 stone and 5.5 pounds. This is the standard UK conversion: kilograms are divided by 6.35 to get stone. Use our weight converter above to convert between kg, stone, and pounds instantly.
What's the healthy weight range for my height at 66 kg?
The healthy weight range varies by height. For someone 5ft 6in tall, a healthy weight is roughly 49–64 kg (7st 9lbs to 10st 1lbs). For someone 5ft 10in tall, it's roughly 54–73 kg (8st 7lbs to 11st 7lbs). Calculate your specific healthy range using our BMI calculator above.
When should I talk to my GP about my weight?
Consider speaking to your GP if: your BMI is outside the healthy range (18.5–24.9), you have weight-related health conditions, your waist circumference exceeds NHS thresholds, or your weight is causing health concerns. Your GP can offer personalised guidance and refer you to NHS weight management services if appropriate.
Does waist measurement matter as much as weight?
Yes. The NHS emphasises that waist measurement is important alongside weight because it indicates where fat is stored. Men with waist over 94 cm and women over 80 cm have increased health risks even at a healthy BMI. A tape measure around your natural waist is a quick health check to do at home.
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.