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
66.5 Kilos in Pounds — Instant Conversion
66.5 kilograms is equal to 146.6 pounds. This conversion uses the standard metric to imperial weight conversion factor. Whether you're tracking your weight on a UK health app, checking a nutrition label, or monitoring your progress towards a health goal, knowing your weight in both metric and imperial units is useful. Use our free weight converter above to convert between kilos, stone, and pounds instantly, or read on for the exact conversion and BMI context at this 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.
66.5kg Conversion — Metric to Imperial Formula
66.5 kg = 146.6 lbs (146.57 pounds to be precise)
To convert kilograms to pounds, use this formula:
- Pounds = kilograms × 2.20462
- 66.5 × 2.20462 = 146.6 lbs
You can also express 66.5kg in stone and pounds: 10 stone 6.6 lbs. To convert kilograms to stone, divide by 6.35029. This weight is commonly tracked on NHS health records in kilograms, but many UK adults prefer to monitor their weight in stone and pounds for personal reference.
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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 and Healthy Weight Context for 66.5kg
At 66.5kg, your BMI depends on your height. For example, at an average UK adult height of 1.73m (5ft 8in), a weight of 66.5kg gives a BMI of approximately 22.3, which falls in the healthy weight range according to NHS guidelines. If you're shorter or taller, your BMI will differ — use our free BMI calculator on this page to check your personal BMI instantly. A healthy BMI for most adults is between 18.5 and 24.9, though for adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds starting at 18.5–22.9.
- 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 66.5kg in pounds exactly?
66.5 kilograms equals 146.57 pounds, often rounded to 146.6 lbs. In stone and pounds, this is 10 stone 6.6 lbs. Use the weight converter on this page to convert between units instantly.
Is 66.5kg a healthy weight?
Whether 66.5kg is healthy depends on your height, age, sex, and ethnicity. At average UK adult heights, this weight typically falls in a healthy range. Use our free BMI calculator to check your personal BMI and get NHS-aligned guidance specific to your measurements.
How do I convert kilos to pounds myself?
Multiply kilograms by 2.20462. So 66.5 × 2.20462 = 146.6 pounds. To convert to stone, divide kilograms by 6.35029 instead. Our weight converter makes this instant — no mental maths needed.
What's the difference between stone and pounds?
In UK measurements, 1 stone equals exactly 14 pounds. So 66.5kg converts to 10 stone 6.6 lbs. Many NHS health records use kilograms, but UK adults often prefer stone and pounds for personal tracking.
How does 66.5kg compare to average UK weight?
The average UK adult woman weighs approximately 71.6kg, and the average UK adult man weighs approximately 85.7kg. At 66.5kg, you're below the UK average. Your BMI is more important than raw weight — check it with our free calculator above for personalised context.
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.