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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Is 86.5kg a Healthy Weight? UK Health Guide
86.5kg converts to 190.5 lbs, but whether this is a healthy weight entirely depends on your height. The NHS uses BMI (body mass index) as the primary screening tool to assess if a weight falls within a healthy range for your individual height. Our free BMI calculator above can instantly tell you if 86.5kg is healthy for you—simply enter your height. In this guide, we'll show you healthy weight ranges for common UK heights, explain NHS guidance, and what to do if your weight falls outside the healthy range.
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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.
Healthy Weight Ranges at Different Heights
At 86.5kg, whether you're at a healthy weight depends entirely on your height. Here are three real-world examples:
- At 1.60m (5ft 3in): 86.5kg gives a BMI of 33.8, which falls into the obese range (BMI 30+). The healthy weight range at this height is 47–64kg (7st 5lbs to 10st).
- At 1.75m (5ft 9in): 86.5kg gives a BMI of 28.3, which falls into the overweight range (BMI 25–29.9). The healthy weight range at this height is 56–76kg (8st 11lbs to 11st 12lbs).
- At 1.90m (6ft 3in): 86.5kg gives a BMI of 23.9, which falls comfortably into the healthy weight range (BMI 18.5–24.9). The healthy range at this height is 66–88kg (10st 5lbs to 13st 12lbs).
Use our free weight converter to check your weight in stone and pounds, then compare it against the BMI calculator to find your personal BMI and healthy weight range for your exact height.
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 Waist Measurement
The NHS recommends a healthy BMI between 18.5 and 24.9 for most UK adults. However, BMI is not the complete picture—where you carry fat also matters. Waist circumference is equally important: men should aim for under 94cm (37in), and women under 80cm (31.5in). If you're 86.5kg and your waist measurement is above these thresholds, speak to your GP about your health even if your BMI appears acceptable. If 86.5kg puts you above a healthy BMI for your height, sustainable weight loss of 0.5–1kg per week is recommended. Your GP can discuss diet, activity, and whether any support might help you reach a healthier weight range 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 is 86.5kg in stones and pounds?
86.5kg converts to 13 stone 8.1 pounds (or 13st 8lbs for short). To convert kg to stone and pounds manually, divide the kilogram weight by 6.35 to get stone, then multiply the remainder by 14 for additional pounds. Our free weight converter on this page makes this instant and accurate.
Is 86.5kg overweight?
It depends on your height. At 86.5kg, someone 1.60m tall would be obese (BMI 33.8), someone 1.75m tall would be overweight (BMI 28.3), and someone 1.90m tall would be at a healthy weight (BMI 23.9). Use the BMI calculator above to check your personal BMI instantly.
What should I do if 86.5kg is above my healthy weight range?
The NHS recommends losing weight gradually at a rate of 0.5–1kg per week, achieved through a modest calorie deficit alongside increased physical activity. Speak to your GP for personalised advice. They can discuss diet changes, exercise, and whether any additional support is appropriate for your health situation.
Does waist measurement matter if my BMI is healthy at 86.5kg?
Yes. The NHS emphasises that waist circumference is equally important as BMI. Men should aim for under 94cm and women under 80cm. Even at a healthy BMI, excess belly fat increases health risks. If your waist is above these thresholds, discuss this with your GP.
How do I know what my healthy weight should be?
Your healthy weight range depends on your height and individual health factors. Calculate your BMI using our free BMI calculator—it shows your healthy weight range instantly. For personalised advice, speak to your GP, who can assess your overall health rather than weight alone.
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.