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 80kg Overweight for Your Height?
Whether 80kg is overweight depends on your height — the same weight can be healthy for one person and overweight for another. The NHS uses BMI (Body Mass Index) to assess weight health, where overweight is defined as a BMI of 25 to 29.9. Use our free BMI calculator above to check your personal BMI instantly and find out where 80kg puts you on the NHS health scale.
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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.
NHS BMI Categories and Overweight Thresholds
The NHS divides weight into five categories based on BMI. Overweight falls between BMI 25 and 29.9, which sits between healthy weight (18.5–24.9) and obesity (30 and above). At 80kg, your BMI depends entirely on your height. For example, someone 5ft 8in (173cm) tall with a weight of 80kg would have a BMI of around 28.5 — falling into the overweight category. However, someone 6ft 2in (188cm) tall weighing 80kg would have a BMI of about 23 — within the healthy range.
- Healthy weight: BMI 18.5–24.9
- Overweight: BMI 25–29.9
- Obese (Class I): BMI 30–34.9
- Obese (Class II): BMI 35–39.9
- Severely obese (Class III): BMI 40+
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — overweight starts at BMI 23. Use our free weight converter to see what 80kg equals in stone and pounds for reference.
Clinically BackedWeight Loss
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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.
Waist Measurement and Next Steps
BMI is a useful screening tool, but it has limitations — it doesn't distinguish between muscle and fat. A complementary check is waist circumference. If you're carrying excess weight around your middle, your health risk may be higher even at the same BMI. The NHS recommends checking your waist: men should aim for under 94cm (37in), and women under 80cm (31.5in).
If your BMI suggests you're overweight, speak to your GP about what this means for your individual health. They can assess your overall risk, consider your family history and other health factors, and discuss healthy weight management options tailored to you. Even losing 5–10% of your body weight can bring meaningful health benefits.
- 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 for a man?
For most men, 80kg is in the healthy or slightly overweight range depending on height. A man who is 5ft 10in (178cm) would have a BMI of around 27.5, which falls into the overweight category. Taller men may find 80kg within the healthy range. Use the free BMI calculator on this page to check your exact BMI.
Is 80kg overweight for a woman?
For most women, 80kg would typically fall into the overweight to obese category, again depending on height. A woman who is 5ft 6in (168cm) weighing 80kg would have a BMI of about 31.6, which is obese. Shorter women would have a higher BMI at this weight. Check your personal BMI using our calculator above.
What does the NHS say about overweight and health risks?
The NHS defines overweight as BMI 25–29.9. Being overweight increases your risk of type 2 diabetes, high blood pressure, heart disease, and certain cancers. However, modest weight loss of just 5% can reduce these risks and improve health markers like blood sugar and cholesterol.
How can I find my healthy weight range for my height?
Your healthy weight range is typically a BMI of 18.5–24.9. Our free BMI calculator shows you the healthy weight range for your exact height instantly. For a person 5ft 8in tall, the healthy range is roughly 50–68kg. Your GP can also provide personalised guidance based on your health profile.
What should I do if I'm overweight?
Start by speaking with your GP, who can assess your overall health and discuss weight management options. The NHS recommends sustainable weight loss of 0.5–1kg per week through a balanced diet and increased physical activity. Track your progress using our free progress tracker to stay motivated on your weight management journey.
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.