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
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189 Lbs in Stone — What's Your BMI?
189 pounds converts to 13 stone and 7 pounds (or approximately 85.7 kg). However, your BMI depends entirely on your height. The same weight can result in anything from a healthy BMI to obesity, depending on how tall you are. This guide shows you what BMI 189 lbs gives at different heights, plus context from NHS guidelines. Use our free BMI calculator above to find your exact personal BMI instantly.
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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.
189 Lbs BMI at Different Heights
At 189 lbs (85.7 kg), your BMI varies significantly with height. Here are example BMI values across common UK heights:
- 5ft 2in (157 cm) — BMI approximately 32.5 (Obese Class I)
- 5ft 5in (165 cm) — BMI approximately 31.4 (Obese Class I)
- 5ft 8in (173 cm) — BMI approximately 29.0 (Overweight)
- 5ft 10in (178 cm) — BMI approximately 27.1 (Overweight)
- 6ft 0in (183 cm) — BMI approximately 25.6 (Healthy weight)
- 6ft 2in (188 cm) — BMI approximately 24.2 (Healthy weight)
Even at the same weight, taller individuals have lower BMI values. To convert kilograms to stone or calculate your personal BMI, try the weight converter and BMI calculator on this page.
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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 & Why Height Matters
The NHS defines BMI categories as: Healthy weight (18.5–24.9), Overweight (25.0–29.9), Obese Class I (30.0–34.9), Obese Class II (35.0–39.9), and Severely obese (40.0+). At 189 lbs, whether you're overweight or healthy depends entirely on your height — this is why BMI always requires both weight and height.
BMI is a useful screening tool, but it has limitations. It doesn't distinguish between muscle and fat, so athletic individuals may have a high BMI despite low body fat. Your GP can provide personalised health guidance based on your individual circumstances, including 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.
Is 189 lbs overweight?
It depends on your height. At 189 lbs, you could be anywhere from healthy weight (if you're 6ft or taller) to obese (if you're under 5ft 5in). Calculate your personal BMI using the BMI calculator on this page to find out where you stand on the NHS scale.
How do I convert 189 lbs to stone?
189 pounds equals 13 stone and 7 pounds exactly. To convert any weight between lbs, stone, and kilograms, use our free weight converter above. 189 lbs is also approximately 85.7 kg.
What's a healthy weight for my height if I'm 189 lbs?
A healthy weight depends on your height. At 189 lbs, you'd need to be roughly 6ft tall or taller to fall in the NHS healthy BMI range (18.5–24.9). Shorter heights at this weight would indicate overweight or obese categories. Your GP can advise on healthy weight targets for you personally.
Does muscle affect BMI at 189 lbs?
Yes. BMI doesn't distinguish between muscle and fat mass. If you're 189 lbs but muscular or athletic, your BMI may appear higher than your actual health risk. This is a known limitation of BMI as a health screening tool. Your GP can assess your overall health picture.
Can I use stone and kilograms interchangeably?
Yes, but only with conversion. One kilogram equals 0.157 stone, and one stone equals 6.35 kg. For accurate conversions between all three units (kg, stone, lbs), use our free weight converter tool above.
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.