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 85kg in Stones?
85kg is equivalent to 13 stone and 5 pounds (13st 5lbs) in UK measurements. This conversion uses the standard formula where 1 stone equals 6.35029 kg. If you need to check what this weight means for your health, our free weight converter and BMI calculator can help you understand your personal health context according to NHS guidance.
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.
85kg BMI and UK Health Context
At 85kg, your health context depends on your height. Using NHS BMI categories, a person weighing 85kg would fall into different health classifications depending on how tall they are. For example, someone 5ft 8in (173cm) tall with a weight of 85kg would have a BMI of approximately 28.4, which falls into the overweight category according to NHS guidelines (BMI 25.0–29.9). However, someone taller — say 6ft 2in (188cm) — would have a BMI of around 24.4, which is in the healthy weight range (BMI 18.5–24.9).
The NHS emphasises that BMI is a useful screening tool, but it has limitations — it does not distinguish between muscle and fat, and does not account for where fat is stored. Your GP can provide personalised health advice based on your individual circumstances, including your medical history and family background.
Use our free BMI calculator above to check your personal BMI instantly, or use the weight converter to switch between different units.
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.
Is 85kg a Healthy Weight in the UK?
Whether 85kg is a healthy weight for you depends on your height, age, ethnicity, and overall health. The NHS healthy weight range is a BMI between 18.5 and 24.9. For some ethnic groups — including people of South Asian, Chinese, Black African, and Black Caribbean heritage — the NHS recommends lower BMI thresholds because these groups face higher health risks at lower weights.
If you are concerned about your weight or want guidance on healthy weight management, your GP is the best first point of contact. They can assess your individual health and discuss any weight management support or treatment options that might be appropriate. Even modest weight loss of 5–10% of body weight can bring meaningful health benefits, including improved blood pressure, better blood sugar control, and reduced joint strain.
- 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 stone and pounds?
Divide 85 by 6.35029 to get stone (85 ÷ 6.35029 = 13.39 stone). The decimal part converts to pounds: 0.39 × 14 = 5.5, so 85kg = 13 stone 5 pounds. Use our free weight converter for instant conversions between kg, stone, and pounds.
Is 85kg overweight according to NHS guidelines?
It depends on your height. An 85kg weight may be overweight, healthy, or even underweight depending on your height. Use the BMI calculator on this page to find your personal BMI, then compare it to NHS categories: healthy weight is BMI 18.5–24.9, overweight is 25–29.9, and obese is 30+.
What's the healthy weight range for someone at my height if I'm 85kg?
Your healthy weight range depends on your specific height. For example, at 5ft 8in, the healthy range is roughly 55–74kg; at 6ft, it's 61–82kg. Use our free BMI calculator to enter your height and see your personal healthy weight range according to NHS guidelines.
Should I lose weight if I'm 85kg?
Only your GP can advise whether weight loss is appropriate for you personally. They will consider your height, BMI, medical history, and overall health. Even small weight losses of 5–10% can improve health. Speak to your GP for personalised guidance and support.
How does 85kg compare to average UK weight?
The UK average weight for adults is around 85.7kg for men and 71.6kg for women (based on ONS data). At 85kg, you're near the average for UK men. However, average weight is not the same as healthy weight — your individual BMI and health context matter more.
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.