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
86 Kilos to Stones and Pounds — What's Your BMI?
86 kilograms equals 13 stone and 8 pounds in UK measurements. However, your BMI depends entirely on your height — the same weight gives a very different BMI for a 5ft 2in person than for a 6ft 2in person. Below, we've shown what BMI 86kg gives you at six common UK heights, along with the NHS health category each falls into. Use our free BMI calculator above to find your exact BMI instantly, or use the weight converter to switch between kg, stone, and lbs.
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.
86kg BMI at Different Heights
86 kilograms (13 stone 8 pounds) produces different BMI results depending on height. Here's what your BMI would be at six typical UK heights:
- At 5ft 2in (157cm): BMI 32.2 — Obese (Class I) according to NHS guidelines
- At 5ft 6in (168cm): BMI 27.8 — Overweight (just below the 30 threshold)
- At 5ft 10in (178cm): BMI 23.3 — Healthy weight range
- At 6ft 0in (183cm): BMI 21.4 — Healthy weight range
- At 6ft 2in (188cm): BMI 19.8 — Healthy weight range
- At 6ft 4in (193cm): BMI 18.5 — Healthy weight range (lower boundary)
The same weight can be healthy or concerning depending on your height. Calculate your personal BMI using the free tool on this page.
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.
Understanding NHS BMI Categories and Limitations
The NHS uses these BMI categories for adults: below 18.5 is underweight, 18.5–24.9 is healthy weight, 25–29.9 is overweight, 30–34.9 is obese (Class I), 35–39.9 is obese (Class II), and 40+ is severely obese. However, BMI has important limitations — it doesn't distinguish between muscle and fat, so athletes may have high BMI but low body fat. It also doesn't account for where fat is stored; waist circumference matters too. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher health risks at the same BMI. Your GP can discuss what your BMI means for your individual health.
- 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 86kg in stones and pounds?
86 kilograms equals 13 stone and 8 pounds (or 13st 8lbs). To convert kilograms to stone, divide by 6.35029. Use our weight converter above to switch instantly between kg, stone, and pounds.
Is 86kg a healthy weight?
That depends on your height. At 5ft 10in, 86kg gives a BMI of 23.3 (healthy). At 5ft 2in, it gives a BMI of 32.2 (obese). Use our free BMI calculator to find your exact BMI and NHS health category.
How do I convert kilos in stone and pounds manually?
Divide kilograms by 6.35 to get stone. Then multiply any decimal by 14 to get pounds. For example: 86 ÷ 6.35 = 13.55 stone. 0.55 × 14 = 7.7 pounds. So 86kg ≈ 13st 8lbs.
What counts as overweight according to the NHS?
According to NHS guidelines, overweight is a BMI of 25–29.9. However, your BMI category depends on your height. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS uses lower thresholds (overweight starts at BMI 23).
Should I lose weight if I'm 86kg?
Weight recommendations are individual and depend on your height, health conditions, and overall fitness. Your GP can advise whether weight loss is appropriate for you. Our BMI calculator can help you see where you fall on the NHS scale, and our weight loss calculator can show projected outcomes if you're considering lifestyle changes.
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.