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 7 Pounds in Kilograms?
12 stone 7 pounds converts to approximately 79.4 kg. If this is your current weight, you're among the majority of UK adults who are managing their weight actively. This guide provides NHS-aligned health context for this weight, including BMI information and practical UK health resources to help you understand where this sits on the healthy weight spectrum for your height and age.
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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.
UK Health Context for 12st 7
At 12st 7 (79.4 kg), your health context depends entirely on your height. According to NHS guidelines, a healthy BMI ranges from 18.5 to 24.9 for most UK adults, though lower thresholds apply if you're of South Asian, Chinese, Black African, or Black Caribbean heritage.
- If you're around 5ft 9in (175 cm), a weight of 12st 7 gives a BMI of approximately 27.8 — classified as overweight
- If you're 5ft 6in (168 cm), the BMI would be around 29 — still in the overweight range
- If you're 6ft (183 cm), the BMI would be around 24.5 — within the healthy weight range
The UK average adult man weighs approximately 85.7 kg (13st 7lb), so 12st 7 is below average. Weight is only one part of health — waist circumference, fitness level, and overall lifestyle matter significantly.
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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.
Check Your Personal BMI and Health Status
To understand your personal health status, use our free BMI calculator above — enter your exact height and current weight to get your BMI instantly and see where you fall on the NHS scale. You can also use our weight converter to check conversions between stone, pounds, and kilograms.
If you're concerned about your weight or health, your GP is the best starting point. They can assess your individual circumstances, consider your medical history, and discuss whether any weight management support — lifestyle changes, dietary advice, or in some cases prescription treatment — might be helpful for 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.
Is 12st 7 a healthy weight?
It depends on your height. At 12st 7 (79.4 kg), your BMI determines whether this is healthy for you. Use the BMI calculator on this page with your height to find out. Generally, this weight is below the UK average for men and could be healthy or overweight depending on your height and frame.
How do I convert 12st 7 to kilograms?
12 stone 7 pounds = 79.4 kg. To calculate: multiply 12 by 6.35 (kg per stone) and add 7 pounds × 0.454 (kg per pound). Our weight converter above makes this instant and accurate for any conversion.
What's my BMI if I weigh 12st 7?
Your BMI depends on your height. At 5ft 9in you'd have a BMI of around 27.8 (overweight); at 6ft it's around 24.5 (healthy). Use our free BMI calculator above to enter your exact height and get your precise BMI instantly.
Should I lose weight from 12st 7?
Whether weight change is advisable depends on your height, age, fitness level, and health conditions. Your GP can advise you personally. NHS guidance recommends a healthy BMI of 18.5–24.9 for most adults, with lower thresholds for certain ethnic backgrounds.
Where can I get NHS weight management support?
If you'd like weight management support, start by talking to your GP. They can refer you to NHS Tier 1 or Tier 2 services, including community weight loss programmes or one-to-one dietary advice. More intensive specialist support is available through Tier 3 services in some areas.
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.