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 kg in stone?
85 kilograms is equivalent to 13 stone and 5 pounds (13st 5lbs) in UK measurements. This weight falls into the overweight category for most adults according to NHS guidelines, though your personal health context depends on your height, age, and overall fitness. Using our free weight converter above, you can instantly switch between kilograms, stone, and pounds for any weight value. Understanding your weight in familiar UK units makes it easier to track your health progress and discuss your weight with your GP if needed.
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.
85 kg — BMI and health context
At 85 kg, your BMI (Body Mass Index) depends on your height. For example, at an average UK adult height of 1.73m (5ft 8in), 85 kg gives a BMI of approximately 28.4, which falls in the overweight category according to NHS guidelines (BMI 25–29.9). However, if you are taller or have significant muscle mass, your BMI may be lower. The NHS recommends a healthy BMI range of 18.5–24.9 for most adults, though for people of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply (18.5–22.9).
It's important to remember that BMI is a screening tool and has limitations — it does not account for muscle versus fat distribution, where excess weight is stored, or your individual health markers like blood pressure or blood sugar levels. Calculate your personal BMI using our free BMI calculator above to see where you stand relative to NHS guidelines for your specific 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.
Is 85 kg overweight? What's the healthy weight range?
Whether 85 kg is overweight depends on your height. According to NHS guidance, the healthy weight range for an adult of average height (around 1.73m/5ft 8in) is approximately 55–76 kg (8st 9lbs to 11st 13lbs). At 85 kg, you would be above this range.
However, many factors affect healthy weight including muscle mass, bone density, genetics, and overall fitness. If you are concerned about your weight or health, your GP can provide personalised advice and discuss whether weight management might benefit you. Even a modest weight loss of 5–10% of body weight can improve blood pressure, blood sugar control, and overall health outcomes. Use our free progress tracker to monitor changes over time, and speak with your healthcare team about a safe, sustainable approach.
- 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 85 kg to stone and pounds?
Divide 85 by 6.35029 to get stone, or multiply by 2.20462 to get pounds. 85 kg = 13 stone 5 pounds exactly. Our free weight converter on this page does this instantly — just enter your weight and switch between units.
What is the BMI for someone weighing 85 kg?
BMI depends on height. At 1.73m (5ft 8in), 85 kg gives a BMI of 28.4 (overweight). At 1.80m (5ft 11in), it's 26.2 (overweight). Use our BMI calculator above to check your exact BMI based on your own height.
Is 85 kg considered obese in the UK?
Not necessarily. According to NHS guidelines, obesity (BMI ≥30) depends on height. At most adult heights, 85 kg falls in the overweight range (BMI 25–29.9) rather than obese. Your GP can assess your individual health status.
What's a healthy weight if I'm 1.75m tall?
For someone 1.75m tall, the healthy weight range (BMI 18.5–24.9) is approximately 56–76 kg (8st 10lbs to 11st 13lbs). At 85 kg, you'd be above this range. A weight loss of 9+ kg would bring you into the healthy range.
Should I lose weight at 85 kg?
Weight management is personal and depends on your health, fitness, and any weight-related health conditions. The NHS recommends a safe loss rate of 0.5–1 kg per week. Speak with your GP about whether weight management is right for you and what approach suits your circumstances.
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.