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
What Is 85 Kilos in Stones and Pounds?
85 kilograms equals 13 stone 6 pounds (or 13st 6lbs) in UK measurements. However, whether this weight is healthy depends on your height. Your BMI — calculated from your weight in kilos divided by your height in metres squared — is what actually matters for health. Use our free BMI calculator above to find your personal BMI instantly, or read on for examples at different heights to see which NHS category you fall into.
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.
BMI at 85kg — Examples by Height
At 85kg, your BMI varies significantly depending on your height. Here are realistic examples:
- 5ft 2in (158cm): BMI 28.1 — overweight category
- 5ft 6in (168cm): BMI 27.4 — overweight category
- 5ft 10in (178cm): BMI 26.9 — overweight category
- 6ft 0in (183cm): BMI 25.4 — healthy weight category
- 6ft 2in (188cm): BMI 24.1 — healthy weight category
This demonstrates why height matters: the same weight can be healthy for one person and overweight for another. Use the weight converter on this page to check your weight in stone and pounds, then use our BMI calculator to determine your personal category.
Clinically BackedWeight Loss
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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
According to NHS guidelines, BMI categories are: under 18.5 (underweight), 18.5–24.9 (healthy weight), 25–29.9 (overweight), 30–34.9 (obese Class I), and 35 and above (obese Class II or III). At 85kg, most adults fall into either the overweight or healthy weight range depending on height. It's important to note that BMI has limitations — it doesn't distinguish between muscle and fat, so very muscular individuals may have a higher BMI without excess body fat. Your GP can provide personalised health advice based on your BMI, waist circumference, and overall 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.
How do I convert 85kg to stones and pounds?
Divide 85 by 6.35 to get stones (13.4 stone), then multiply the decimal by 14 to get pounds (6 lbs). So 85kg = 13 stone 6 pounds exactly. Our free weight converter above performs this instantly for any weight.
What does 85kg weigh in just pounds?
85 kilograms equals approximately 187.4 pounds (or lbs). This is useful if you're comparing against US measurements, though UK health services typically use stone and kilograms together.
Is 85kg a healthy weight?
It depends entirely on your height. At 85kg, a person who is 6ft tall has a healthy BMI of 25.4, while someone 5ft 6in tall would have a BMI of 27.4 (overweight). Use our BMI calculator above to check your personal result.
What's the healthy weight range for my height at 85kg?
The NHS healthy weight range varies by height. At 85kg, you're in the healthy range if you're taller than about 5ft 10in. For shorter heights, losing a small amount of weight would move you into the healthy BMI range. Your GP can advise on targets specific to your health.
Can I use BMI to track weight loss progress?
Yes, BMI is useful for tracking progress over time. However, consider measuring waist circumference too, as this is a better indicator of health risk than BMI alone. Our free progress tracker helps you log both weight changes and health milestones.
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.