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
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What Does 165kg Mean for Your Health in the UK?
165kg is approximately 25 stone and 13 pounds in UK measurements. For most UK adults, this weight falls into the overweight category according to NHS guidelines, though the health context depends on your height, age, and overall fitness. Understanding your weight in familiar UK units and how it relates to NHS health thresholds is an important first step in health awareness. This guide explains what 165kg means for your health and directs you to the right NHS resources and tools to support your wellbeing.
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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.
165kg in UK Measurements and NHS Health Context
165kg converts to exactly 25 stone 13.2 pounds using the standard UK weight conversion. If you're more familiar with BMI categories, 165kg at an average UK height of around 1.73m (5ft 8in) gives a BMI of approximately 55, which falls into the severely obese category according to NHS guidelines. However, BMI is a screening tool only—it doesn't account for muscle mass, bone density, or where fat is distributed on the body.
The NHS recommends that adults with a BMI over 40, or between 30–40 with weight-related health conditions, should seek support through their GP or tier 3 weight management services. At 165kg, you may be eligible for NHS specialist weight management support, prescription weight loss medication, or other interventions depending on your individual health profile and regional ICB availability.
Use our free BMI calculator above to check your exact BMI based on your height, and the weight converter to see your weight in different units instantly.
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.
UK Health Support and Next Steps for Weight Management
The NHS has a structured weight management pathway: tier 1 covers self-help resources and community programmes, tier 2 includes GP-supported behaviour change interventions, tier 3 offers specialist multidisciplinary services where prescription medications may be considered, and tier 4 covers bariatric surgery for eligible patients. At 165kg, your GP can refer you to your local tier 3 specialist weight management service.
Prescription weight management medications such as Mounjaro or Wegovy may be available through the NHS if you meet eligibility criteria, though access varies significantly by region and waiting times can be substantial. Many people also access these medications privately through UK-licensed online prescribing services following a clinical assessment. Sustainable weight loss typically involves lifestyle changes—reduced-calorie diet and increased physical activity—alongside any medication. Try our GLP-1 weight loss calculator to explore projected outcomes at different doses if you're considering prescription support.
- 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 do I convert 165kg to stone?
165kg equals 25 stone 13.2 pounds. To convert, divide 165 by 6.35 to get stone. Use our free weight converter on this page to instantly switch between kg, stone, and pounds for any weight value.
Is 165kg considered obese in the UK?
At 165kg, your BMI classification depends on your height. For an average UK adult height of 1.73m, 165kg gives a BMI of approximately 55, which is severely obese by NHS guidelines. Your GP can provide personalised health context and support.
Can I get weight management support on the NHS at 165kg?
Yes. You may be eligible for NHS tier 3 specialist weight management services, which can include behaviour change support, dietitian input, and prescription medications. Ask your GP for a referral to your local service. Availability and waiting times vary by region.
What weight loss medications might be available to me?
Prescription weight management injections like Mounjaro (tirzepatide) and Wegovy (semaglutide) may be available through NHS specialist services or private prescribing, depending on your health profile and eligibility. Only a licensed prescriber can assess suitability after a clinical evaluation.
How much weight loss is realistic and safe?
The NHS recommends losing 0.5–1kg per week for sustainable results. At 165kg, even a 5–clinically studied weight loss (8–17kg) can significantly improve health outcomes including blood pressure, blood sugar control, and joint strain. Combine dietary changes with increased physical activity for best results.
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.