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 12 Stone 10 In Kilograms?
12 stone 10 pounds is equivalent to approximately 80.29 kg. To convert this weight using the standard UK to metric conversion, you multiply the stone value by 6.35029 and add the pounds converted to kilograms. If you're checking your weight for health purposes, understanding your weight in both UK and metric measurements helps you access NHS guidance and use health calculators more effectively. Our free weight converter above makes this calculation instant and accurate.
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.
How To Convert 12 Stone 10 To Kilograms
The conversion from UK measurements to kilograms uses two simple formulas. First, convert stone to kg: 12 stone × 6.35029 = 76.20 kg. Then, convert pounds to kg: 10 lbs × 0.453592 = 4.54 kg. Add these together: 76.20 + 4.54 = 80.29 kg. This is the standard metric conversion recognised by the NHS and used in UK health guidance. You can verify this using our weight converter tool on this page, which handles the calculation instantly. For clinical purposes, healthcare professionals will typically round to 80 kg, but the precise conversion is useful for tracking weight changes accurately over time.
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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.
BMI And Health Context For 80kg Weight
At 80.29 kg, your BMI depends entirely on your height — this is why BMI is calculated as weight divided by height squared. For example, at 5ft 9in (175cm), a weight of 80kg gives a BMI of approximately 26.1, which falls in the overweight category according to NHS guidelines. However, at 5ft 11in (180cm), the same weight gives a BMI of around 25.2, which is a healthy weight. Use our free BMI calculator above to find your exact BMI based on your height and weight. If you're considering weight management options, your GP or a healthcare professional can give you personalised NHS health advice based on your individual circumstances.
- 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 80kg overweight or obese?
Whether 80kg is overweight depends on your height. At average UK heights (5ft 4in to 5ft 10in), 80kg typically falls into the overweight or healthy weight ranges. BMI categories are: healthy weight 18.5–24.9, overweight 25–29.9, obese 30+. Use our BMI calculator to find your exact category based on your personal height and weight.
How do I convert stone and pounds to kg quickly?
Multiply stone by 6.35029, then multiply pounds by 0.453592, then add them together. For 12 stone 10: (12 × 6.35029) + (10 × 0.453592) = 80.29kg. Our free weight converter on this page does this instantly — just enter your weight and select your units.
What is the healthy weight range at 80kg?
A healthy weight range depends on height. For example, at 5ft 6in, a healthy weight is roughly 54–71kg; at 5ft 9in, it's 55–75kg. At 80kg, you may be above the healthy range depending on your height. Your GP can advise on a healthy weight for you, or use our BMI calculator to check your personal status.
Should I use stone or kg for health tracking?
Both are useful. The NHS uses kilograms for clinical purposes, but many UK adults find stone more intuitive for personal tracking. Choose whichever you prefer — consistency matters more than the unit. Our progress tracker helps you log weight changes in either measurement.
How does 80kg compare to average UK weight?
According to recent UK health data, the average adult man weighs approximately 85.7kg and the average woman weighs approximately 71.6kg. At 80kg, your weight is slightly below the average for UK men and above the average for UK women — but healthy weight varies significantly by height and individual health factors.
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.