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
8.2 Pounds to Kg — What's Your BMI?
8.2 pounds converts to 3.72 kilograms using the standard metric conversion (1 lb = 0.453592 kg). However, your BMI depends entirely on your height. At different heights, 8.2 pounds (3.72 kg) produces very different BMI results. Use our free BMI calculator above to find your personal BMI instantly, or check the examples below to see where your weight falls on the NHS health scale. Understanding your BMI helps you assess whether your weight is healthy for your height.
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.
8.2 Pounds (3.72 kg) — BMI at Different Heights
At 8.2 pounds (3.72 kg), your BMI varies significantly depending on height. Here are examples using the metric to imperial weight conversion:
- 5ft 0in (152 cm): BMI = 28.5 (Overweight, NHS category)
- 5ft 4in (163 cm): BMI = 23.1 (Healthy weight, NHS category)
- 5ft 8in (173 cm): BMI = 20.3 (Healthy weight, NHS category)
- 6ft 0in (183 cm): BMI = 17.9 (Underweight, NHS category)
Remember, this weight alone is quite light for most adults. If you're converting from stone and pounds or need to understand your full weight context, calculate your complete BMI using the calculator on this page.
Clinically BackedWeight Loss
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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 and Why Height Matters
The NHS uses BMI ranges to assess whether weight is healthy for height. A healthy BMI falls between 18.5 and 24.9. Because BMI accounts for both weight and height, the same weight (8.2 pounds) produces underweight, healthy, or overweight results depending on your height. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends lower thresholds—healthy weight starts at BMI 18.5 but overweight begins at 23.0. BMI has limitations though; it doesn't distinguish muscle from fat, so athletes may have high BMI despite low body fat. Use our weight converter to check other weight values, and consult your GP if you're concerned about your weight.
- 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 8.2 pounds in kilograms?
8.2 pounds equals 3.72 kilograms. To convert, multiply pounds by 0.453592. This is a light weight; for most adults, it would represent only a portion of total body weight rather than a complete measurement.
Is 8.2 pounds a healthy weight?
At 8.2 pounds (3.72 kg) alone, this isn't typically a complete adult body weight. Your BMI and health depend on your full weight and height. Use our free BMI calculator to check your complete measurements against NHS guidelines.
How do I convert stone and pounds to kg?
To convert stone and pounds to kilograms: multiply stone by 6.35029, multiply pounds by 0.453592, then add both results. For example, 10 stone 5 pounds = (10 × 6.35029) + (5 × 0.453592) = 65.76 kg. Try our weight converter for instant conversions.
What BMI range is healthy according to the NHS?
The NHS defines healthy BMI as 18.5 to 24.9 for most adults. Overweight is 25.0–29.9, and obese begins at 30.0. However, South Asian and Black African adults have lower thresholds starting at BMI 23.0 for overweight. Calculate your personal BMI using the calculator on this page.
Why does height affect BMI so much?
BMI divides weight by height squared (kg ÷ height in metres²). This means small changes in height create large BMI differences. A person 5ft 0in and another at 6ft 0in with identical weight will have very different BMIs because height is squared in the calculation.
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.