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
Is 79.8kg a Healthy Weight in Stones?
79.8kg converts to 12 stone 8.5 lbs (or 12st 8.5lbs in UK measurements). Whether this is a healthy weight depends entirely on your height. At the same weight, someone 5ft 4in might be overweight, while someone 5ft 10in could be in the healthy range. This guide shows you how to check using NHS guidelines and explains what a healthy weight means for your body. Use our free BMI calculator above to check your personal BMI instantly based on your exact height and weight.
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.
Healthy Weight Ranges by Height at 79.8kg
At 79.8kg, your weight status depends on your height. The table below shows whether 79.8kg falls into the healthy, overweight, or obese range according to NHS guidelines:
- 5ft 2in (157cm): BMI 32.3 — obese (unhealthy range)
- 5ft 6in (168cm): BMI 28.3 — overweight but not obese
- 5ft 10in (178cm): BMI 25.2 — overweight (just above healthy range)
- 6ft 0in (183cm): BMI 23.8 — healthy weight
The NHS healthy weight range is a BMI of 18.5 to 24.9. To convert kilograms to stone accurately for your own height, use the weight converter on this page, then cross-reference with the BMI calculator to see where you sit.
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.
NHS Guidance and What to Do Next
If 79.8kg puts you outside the healthy BMI range for your height, you're not alone — around 63% of UK adults are overweight or obese. The good news: even a 5–10% reduction in body weight can have real health benefits, including lower blood pressure and improved blood sugar control.
Next steps: Talk to your GP about your weight and health. They can discuss whether lifestyle changes, support from an NHS weight management programme, or other options might suit you. Waist measurement also matters — the NHS recommends men keep waist circumference under 94cm (37in) and women under 80cm (31.5in) for good health. Track your progress with our free progress tracker.
- 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 79.8kg in stones exactly?
79.8kg equals 12 stone 8.5 lbs (12st 8.5lbs). To convert kilograms to stone, divide by 6.35. So 79.8 ÷ 6.35 = 12.57 stone. The decimal converts to approximately 8.5 lbs.
Is 79.8kg overweight or obese?
It depends on your height. At 79.8kg, someone 5ft 4in would be obese (BMI 32), someone 5ft 8in would be overweight (BMI 27.6), and someone 6ft would be in the healthy range (BMI 23.8). Use the BMI calculator on this page to check your personal status.
What is the healthy weight range at my height?
A healthy BMI is 18.5–24.9 according to NHS guidelines. If you're 5ft 8in, the healthy weight range is roughly 54–73kg (8st 6lbs to 11st 6lbs). For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends a lower healthy range of 18.5–22.9 BMI.
How much weight do I need to lose from 79.8kg?
This depends on your height and current BMI. Use our free BMI calculator to find your healthy weight range for your height. The NHS recommends losing no more than 0.5–1kg per week for sustainable results. Even losing 5–10% of your body weight has measurable health benefits.
Should I be concerned about weight at 79.8kg?
Your GP can give you personalised advice. Weight alone doesn't tell the full story — waist measurement, fitness level, and family history also matter. If you have weight-related health conditions like type 2 diabetes or high blood pressure, your GP may suggest a structured weight management approach or referral to NHS specialist services.
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.