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 Does 2 Stone of Fat Mean for Your Health?
2 stone of fat equals approximately 12.7 kg or 28 lbs of body fat mass. Understanding body fat is important because it differs from total body weight — your body contains muscle, bone, water, and fat, and where that fat is stored matters for your health. This guide explains what 2 stone of fat means, how it relates to your overall health, and how to assess your personal body composition using NHS guidance and our free health calculators.
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.
Body Fat vs Total Body Weight — What's the Difference?
Body fat is only one component of your total weight. A person can weigh the same as someone else but have very different body compositions.
- Total body weight = muscle + bone + organs + water + fat
- Body fat percentage = fat mass divided by total body weight
- Two people at the same weight can have very different health profiles if one has more muscle and less fat
This is why the NHS emphasises that BMI alone is not enough to assess health. Waist circumference — which reflects where fat is stored — is equally important. Fat stored around the abdomen (visceral fat) poses greater health risks than fat stored elsewhere. Using our free BMI calculator alongside a waist measurement gives a clearer picture of your health than weight alone.
Clinically BackedWeight Loss
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.
Healthy Body Fat Ranges and What 2 Stone of Fat Means
The "healthy" amount of body fat varies by age and sex. For most UK adults, body fat percentages are categorised as:
- Women: 10–13% essential fat; 21–24% fitness range; 25–31% acceptable range
- Men: 2–5% essential fat; 14–17% fitness range; 18–24% acceptable range
Whether 2 stone of fat is healthy depends entirely on your total body weight and height. Someone weighing 10 stone with 2 stone of fat has a body fat percentage of 20% — likely healthy. Someone weighing 15 stone with 2 stone of fat has a body fat percentage of 13% — very lean. Use our free weight converter and BMI calculator to understand your personal composition and discuss any concerns with your GP.
- 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.
How much is 2 stone of fat in kilograms?
2 stone equals 12.7 kg. To convert: 2 × 6.35029 = 12.7 kg. You can verify this instantly using our free weight converter above, which handles stone-to-kg conversions for any weight.
Is 2 stone of body fat a lot?
It depends on your total body weight and height. For someone weighing 10 stone, 2 stone of fat (20%) is within a healthy range. For someone weighing 20 stone, it represents only 10% body fat (very lean). Your GP or a fitness professional can assess whether your body composition is healthy for you personally.
How does body fat differ from BMI?
BMI measures weight relative to height and doesn't distinguish muscle from fat. Body fat percentage measures actual fat mass. Two people with identical BMI can have different body compositions. Our free BMI calculator shows your BMI category, but waist measurement and overall health matter too — discuss with your GP.
Can I reduce body fat without losing total weight?
Yes. Through strength training and adequate protein intake, you can build muscle while losing fat — your total weight may stay similar or even increase slightly, but your body composition improves. This is why weight alone doesn't tell the full story of health. A GP or registered dietitian can advise on sustainable changes.
What's the difference between subcutaneous and visceral fat?
Subcutaneous fat sits under the skin (pinchable). Visceral fat surrounds organs in the abdomen and poses greater health risks. Waist circumference indicates visceral fat: men over 94 cm and women over 80 cm are at increased risk. The NHS recommends measuring waist alongside weight for a complete health picture.
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.