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's Your BMI At 84.5 Kg?
84.5 kg converts to approximately 186.4 lbs. However, your BMI at this weight depends entirely on your height. Whether this weight is healthy for you falls into different NHS categories depending on how tall you are. Use our free BMI calculator above to enter your exact height and get your personalised BMI instantly. This guide shows you example BMI values across common heights so you can understand where you fall on the NHS health scale.
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 84.5 Kg — By Height
Your BMI depends on both weight and height. At 84.5 kg, here's your BMI across common UK heights:
- 5ft 2in (157 cm): BMI 34.3 — Obese (Class I)
- 5ft 5in (165 cm): BMI 31.1 — Obese (Class I)
- 5ft 8in (173 cm): BMI 28.4 — Overweight
- 5ft 10in (178 cm): BMI 26.7 — Overweight
- 6ft (183 cm): BMI 25.2 — Healthy weight
- 6ft 2in (188 cm): BMI 23.9 — Healthy weight
The same weight gives very different health categories depending on height. Taller individuals have lower BMI scores at the same weight. You can also use the metric to imperial weight conversion to see that 84.5 kg to stone equals approximately 13st 4lbs.
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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 & Limitations
NHS BMI categories are: healthy weight (18.5–24.9), overweight (25–29.9), obese Class I (30–34.9), obese Class II (35–39.9), and severely obese (40+). For people of South Asian, Chinese, Black African, or Caribbean heritage, thresholds are lower due to higher health risks at the same BMI. Remember: BMI doesn't account for muscle mass. Athletes or very muscular individuals may have high BMI but low body fat. Your GP can provide personalised health advice based on your weight, height, waist measurement, and overall health profile.
- 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 84.5 kg to lbs?
Multiply 84.5 by 2.20462. The result is approximately 186.4 lbs. You can also use our free weight converter above to switch instantly between kg, stone, and pounds — no calculator needed.
Is 84.5 kg a healthy weight?
It depends on your height. At 5ft 8in, it's overweight (BMI 28.4). At 6ft, it's healthy (BMI 25.2). Use our free BMI calculator to enter your height and see your personal BMI category according to NHS guidelines.
What's 84.5 kg in stone and pounds?
84.5 kg equals approximately 13 stone and 4 pounds. You can verify this using our weight converter tool on this page.
Why does BMI change with height at the same weight?
BMI is calculated as weight divided by height squared. Taller people have more body surface area, so the same weight spread over greater height produces a lower BMI number, resulting in different NHS health categories.
Should I be concerned about my weight at 84.5 kg?
Health depends on many factors beyond weight alone — your height, age, muscle mass, fitness level, and existing health conditions all matter. Your GP can assess whether your weight is healthy for you personally and advise on any lifestyle changes if needed.
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.