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
85 Kg in Stone and Pounds — What's Your BMI?
85 kilograms is equivalent to 13 stone and 5 pounds in UK measurements. However, whether this weight is healthy depends entirely on your height. The same weight can give a very different BMI depending on how tall you are. Use our free BMI calculator above to find your exact BMI, or scroll down to see what BMI 85kg gives at different heights and where it falls in the NHS health categories.
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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.
What BMI Does 85 Kg Give at Different Heights?
To convert 85kg to stone accurately, we divide by 6.35029, which gives 13 stone 5 pounds (or 13st 5lbs). However, BMI depends on both weight and height. Here's what 85kg means for BMI at common UK heights:
- At 5ft 4in (163cm): BMI of 31.5 — Obese (Class I) category
- At 5ft 6in (168cm): BMI of 29.4 — Overweight category
- At 5ft 8in (173cm): BMI of 27.5 — Overweight category
- At 5ft 10in (178cm): BMI of 26.0 — Overweight category
- At 6ft 0in (183cm): BMI of 25.3 — Healthy weight category
Use the weight converter on this page to switch between metric and imperial measurements whenever you need to.
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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.
NHS BMI Categories and What They Mean for Your Health
The NHS uses these BMI categories to assess health risk. A BMI of 25.0 to 29.9 is classified as overweight, and 30.0 or above as obese. At 85kg, whether you fall into these categories depends entirely on your height — as shown above. It's important to remember that BMI is a screening tool only and does not measure body fat directly or account for muscle mass. Your GP can offer personalised advice about what your individual BMI means for your health. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds, so eligibility for weight management support may differ.
- 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 85kg overweight?
Whether 85kg is overweight depends on your height. At shorter heights (under 5ft 6in), 85kg is likely in the overweight or obese category. At taller heights (5ft 10in or above), it may fall into the healthy weight range. Use our free BMI calculator above to check your specific BMI and health category.
What does 85kg equal in stone and pounds?
85kg converts to 13 stone 5 pounds (13st 5lbs). To convert kilograms to stone manually, divide the kg by 6.35029. Our weight converter above makes this instant and accurate for any weight.
What's a healthy weight at my height if I weigh 85kg?
The healthy weight range depends on your height. The NHS BMI calculator shows the healthy weight range for your exact height. Generally, at most adult heights, a healthy weight is between approximately 55kg and 75kg, though this varies significantly. Your GP can advise on the right weight for your individual health.
Can BMI be misleading?
Yes. BMI does not distinguish between muscle and fat, so very muscular people may have a high BMI without excess body fat. BMI also doesn't account for where fat is stored or age-related factors. It's a useful screening tool, but your GP should consider your full health picture alongside BMI.
Does 85kg put me at health risk?
Health risk depends on BMI, waist measurement, and overall fitness. At 85kg, your risk depends on your height and other factors. Your GP can assess your individual health risk and discuss whether weight management, diet, or exercise changes might be helpful for your wellbeing.
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.