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 79kg in Stone and What's the BMI?
79kg is approximately 12 stone 6 pounds in UK measurements. However, your BMI at this weight depends entirely on your height. Using the BMI calculator on this page, you can discover what your personal BMI is and whether it falls into the NHS healthy weight range. This guide shows you what 79kg means for different heights and explains the health context using official NHS weight categories.
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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.
79kg BMI at Different Heights
To convert 79kg to stone, divide by 6.35 — giving approximately 12 stone 6 pounds. However, BMI is calculated using both weight and height, so your individual BMI depends on how tall you are.
Here are example BMI values at 79kg for common UK heights:
- 160cm (5ft 3in): BMI 30.8 — Obese (Class I)
- 165cm (5ft 5in): BMI 29.0 — Overweight
- 170cm (5ft 7in): BMI 27.4 — Overweight
- 175cm (5ft 9in): BMI 25.8 — Overweight
- 180cm (5ft 11in): BMI 24.4 — Healthy weight
- 185cm (6ft 1in): BMI 23.1 — Healthy weight
For adults of South Asian, Chinese, Black African, or Black Caribbean backgrounds, the NHS recommends lower thresholds — so different height bands may apply to you.
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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 Health Context
According to NHS guidelines, a healthy BMI range is 18.5 to 24.9 for most adults. At 79kg, whether you fall into this range depends on your height (as shown above). BMI is a useful screening tool, but it has important limitations — it does not distinguish between muscle and fat, and does not account for where fat is stored around your body. Your waist circumference is also important: increased health risk starts at over 80cm (31.5in) for women and 94cm (37in) for men.
Use our free weight converter above to check your exact stone and pounds, and use our BMI calculator to see your personal BMI category. If you have concerns about your weight and health, your GP can give you personalised advice.
- 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 79kg overweight?
At 79kg, whether you are overweight depends on your height. For someone 170cm tall (5ft 7in), a BMI of 27.4 falls into the overweight category. For someone 185cm tall (6ft 1in), the same weight gives a BMI of 23.1, which is in the healthy range. Use the BMI calculator on this page to find your personal category.
How do I convert 79kg to stone and pounds?
79kg equals approximately 12 stone 6 pounds. To convert kilograms to stone yourself, divide the kg by 6.35. To convert to pounds only, multiply kg by 2.20462. Our free weight converter makes this instant for any weight.
What is a healthy weight range at my height?
The NHS healthy weight range depends on your height. At a BMI of 18.5 to 24.9, you are in the healthy range. For example, at 175cm (5ft 9in), healthy weight is approximately 57–76kg. Use our BMI calculator above to find your personal healthy range based on your exact height.
Does 79kg mean I'm obese?
Not necessarily. At 79kg, your weight category (underweight, healthy, overweight, or obese) is determined by your height. Someone 160cm tall would fall into the obese category, but someone 185cm tall would be in the healthy range. Only your GP or a BMI calculation can say for certain.
Why does BMI matter if it has limitations?
BMI is a useful initial screening tool recognised by the NHS and used widely in health services. However, it should not be your only measure — waist circumference, fitness level, and overall health are also important. Your GP can advise you on what a healthy weight means for your individual circumstances.
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.