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 Adults in the UK?
Whether 80kg is overweight depends entirely on your height. For an adult who is 5ft 8in (173cm), 80kg gives a BMI of 26.8, which falls in the overweight category according to NHS guidelines. However, at 6ft 2in (188cm), 80kg would be within the healthy weight range. Use our free BMI calculator above to check your personal BMI instantly and understand what your weight means for your health. Your height, age, and individual circumstances all play a role in determining whether your current weight presents any health risks.
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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.
Health Risks Associated with Excess Weight
If 80kg puts you in the overweight or obese BMI category, it's important to understand the potential health impacts. Excess weight increases your risk of several serious health conditions, including type 2 diabetes (risk increases significantly with BMI), high blood pressure, heart disease, and stroke. Being overweight also raises the risk of certain cancers, non-alcoholic fatty liver disease, and obstructive sleep apnoea. The NHS emphasises that even modest weight loss—as little as 5–10% of your body weight—can meaningfully reduce these risks and improve blood sugar control, blood pressure, and cholesterol levels.
- Type 2 diabetes risk increases with BMI
- Cardiovascular disease risk rises with excess weight
- Joint problems and osteoarthritis become more likely
- Sleep apnoea severity often improves with weight loss
However, BMI alone doesn't tell the full story. Your waist circumference also matters—the NHS recommends keeping waist measurements below 94cm (37 inches) for men and 80cm (31.5 inches) for women to reduce health risks. Use our free weight converter above to check your weight in different units and our BMI calculator to assess your personal health risk profile.
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.
Support Available to You: NHS Pathways and Options
If you're concerned about your weight at 80kg or above, the NHS offers several evidence-based support pathways. Your first step is to speak with your GP, who can assess your individual health situation, check for weight-related conditions, and discuss lifestyle changes like diet and exercise. For adults eligible for further support—typically those with a BMI of 30 or above, or 27–29.9 with weight-related health conditions—specialist weight management services (Tier 3) are available through the NHS, though availability varies by region and waiting times can be lengthy.
For eligible adults, prescription weight loss medications may be an option alongside lifestyle changes. These require a clinical assessment to confirm suitability. You can also track your progress using our free progress tracker to monitor changes over time and stay motivated. Your GP or a prescriber can advise whether medication is appropriate for your individual circumstances.
- 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 BMI counts as overweight at 80kg?
At 80kg, your BMI depends on your height. For example: at 1.70m (5ft 7in), 80kg = BMI 27.7 (overweight); at 1.80m (5ft 11in), 80kg = BMI 24.7 (healthy). Use our free BMI calculator to find your exact BMI and category instantly.
Is 80kg overweight for women and men?
80kg may be overweight, healthy, or even underweight depending on height and individual body composition. The NHS overweight threshold (BMI 25–29.9) applies equally to men and women, but individual circumstances vary. Always consult your GP for personalised advice.
What health risks come with being overweight at 80kg?
If 80kg puts you in the overweight or obese BMI range, risks include type 2 diabetes, heart disease, high blood pressure, stroke, and certain cancers. However, even a 5–10% weight reduction can significantly lower these risks. Evidence-based lifestyle changes or prescription support may help.
How can I check if I'm overweight with my weight and height?
The easiest way is to calculate your BMI using our free BMI calculator on this page. Simply enter your weight (in kg or stone) and height (in cm or feet/inches), and it will instantly tell you your BMI category according to NHS guidelines.
What NHS support is available if I'm overweight at 80kg?
Start by speaking with your GP, who can assess your health and discuss lifestyle changes. If eligible (typically BMI ≥30 or ≥27 with health conditions), you may be referred to specialist Tier 3 weight management services. Your GP can also discuss prescription weight loss options if appropriate.
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.