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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What's 150 Kg in Stone — and What BMI Does It Give?
150 kilograms converts to approximately 23 stone 8 pounds in UK measurements. However, your BMI — the key health indicator — depends entirely on your height. At the same weight of 150kg, a taller person will have a lower BMI than a shorter person. Below, you'll find what BMI 150kg gives you at different heights, and where each falls within NHS categories. Use our free BMI calculator above to find your exact BMI using your personal height and weight.
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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.
150 Kg BMI at Different Heights
Your BMI at 150kg varies significantly by height. Here are BMI values across common adult heights:
- 160cm (5ft 3in): BMI 58.6 — Severely obese (Class III)
- 165cm (5ft 5in): BMI 55.1 — Severely obese (Class III)
- 170cm (5ft 7in): BMI 51.8 — Severely obese (Class III)
- 175cm (5ft 9in): BMI 48.98 — Severely obese (Class III)
- 180cm (5ft 11in): BMI 46.3 — Severely obese (Class III)
- 185cm (6ft 1in): BMI 43.86 — Severely obese (Class III)
All these heights fall into the severely obese category. A healthy BMI is 18.5–24.9 according to NHS guidelines. At 150kg, reaching a healthy BMI would require significant weight loss. However, even modest weight reductions of 5–10% can bring meaningful health improvements. Use the weight converter on this page to see your weight in different units.
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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 & What They Mean
The NHS BMI categories are standardised across the UK: BMI below 18.5 is underweight, 18.5–24.9 is healthy weight, 25–29.9 is overweight, 30–34.9 is obese class I, 35–39.9 is obese class II, and 40+ is severely obese (Class III). At 150kg, you're in the severely obese category across all typical adult heights. BMI is a useful screening tool, but it has limitations — it doesn't distinguish between muscle and fat, and waist circumference also matters for health risk assessment. Your GP can provide personalised health advice. For those of South Asian, Chinese, Black African, or Black Caribbean heritage, NHS recommends assessing health risk at lower BMI thresholds.
- 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.
What is 150kg in stone and pounds?
150 kilograms equals 23 stone and 8 pounds (23st 8lbs) in UK measurements. To convert kg to stone, divide by 6.35029. At 150kg, this gives approximately 23.6 stone, which converts to 23 stone plus 0.6 × 14 pounds = 23 stone 8.4 pounds.
Is 150kg overweight or obese?
At 150kg, your BMI falls into the severely obese (Class III) category across all typical adult heights. A BMI of 40 or above indicates severe obesity according to NHS guidelines. Your specific BMI depends on your exact height — use our free BMI calculator above to find yours and get personalised health context.
How much weight would I need to lose to reach a healthy BMI?
To reach a healthy BMI (18.5–24.9) from 150kg, the amount of weight loss depends on your height. For example, at 175cm (5ft 9in), a healthy weight range is approximately 56–76kg, meaning a loss of 74–94kg would be needed. Your GP can discuss realistic, sustainable targets with you.
Can I use online calculators to check my BMI at 150kg?
Yes. Our free BMI calculator on this page instantly shows your BMI when you enter 150kg and your height. You can also use the NHS BMI calculator at nhs.uk. Having your exact height measurement is essential for an accurate BMI reading.
What health risks are associated with a BMI in the severely obese range?
A BMI in the severely obese range (40+) significantly increases risk of type 2 diabetes, cardiovascular disease, certain cancers, sleep apnoea, and joint problems. However, even a 5–10% weight reduction can improve blood pressure, blood sugar, and cholesterol levels. Speak with your GP about safe, evidence-based weight management options.
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.