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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Is 187kg in Stone a Healthy Weight?
187kg is equivalent to 29 stone 6 pounds — but whether this is a healthy weight depends entirely on your height. An adult who is 5ft 6in tall with this weight would have a BMI of 30.3 (obese category), whilst someone 6ft 4in tall would have a BMI of 23.4 (healthy weight). This guide explains how to check if 187kg is healthy for your specific height using NHS standards, and what support is available if you want to make changes.
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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.
Healthy Weight Ranges at Different Heights
At 187kg, your healthy weight status depends on your height. Use our free BMI calculator above to enter your exact measurements and get an instant assessment. Here's how 187kg (29st 6lbs) compares across different heights:
- 5ft 4in (163cm): 187kg = BMI 31.0 (obese) — healthy range is 54–72kg (8st 6lbs to 11st 4lbs)
- 5ft 10in (178cm): 187kg = BMI 26.4 (overweight) — healthy range is 59–79kg (9st 4lbs to 12st 6lbs)
- 6ft 2in (188cm): 187kg = BMI 24.0 (healthy) — healthy range is 63–85kg (10st 0lbs to 13st 5lbs)
The NHS defines a healthy BMI as 18.5 to 24.9. At 187kg, you're likely in the overweight or obese range unless you're considerably tall. Our weight converter can help you switch between kg, stone, and pounds instantly.
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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.
What to Do If 187kg Is Outside Your Healthy Range
If 187kg is above the healthy range for your height, the NHS recommends a gradual approach. Losing even 5–10% of your body weight can improve blood pressure, blood sugar control, and reduce cardiovascular risk. Start by speaking to your GP, who can assess your individual situation and discuss realistic goals.
Practical next steps: Track your current diet and activity, aim for a calorie deficit of around 500 kcal per day for approximately 0.5kg weekly loss, and increase physical activity gradually. If lifestyle changes alone aren't working, your GP can refer you to a specialist weight management service (tier 3 NHS services) where prescription support may be discussed. You can also use our free progress tracker to monitor your weight loss journey over time.
- 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 187kg in stone exactly?
187kg converts to 29 stone and 6 pounds (29st 6lbs). To calculate this: divide 187 by 6.35029. Use our weight converter above for instant conversions between kg, stone, and pounds in both directions.
Is 187kg overweight or obese?
It depends on your height. At 5ft 6in, 187kg is obese (BMI 30.3). At 5ft 10in, it's overweight (BMI 26.4). At 6ft 2in, it's healthy (BMI 24.0). Use our free BMI calculator above to check your personal BMI based on your exact height.
What is the healthy weight range at 187kg?
The healthy weight range varies by height. For someone 5ft 8in tall, the healthy range is approximately 56–76kg (8st 12lbs to 12st 0lbs). For 5ft 6in, it's 51–69kg (8st 0lbs to 10st 13lbs). Your GP can help determine your ideal target weight.
How much weight would I need to lose to reach a healthy BMI?
This depends on your height. If you're 5ft 6in and weigh 187kg (BMI 30.3), you'd need to reach approximately 69kg (BMI 24.9) for the healthy range — a loss of about 118kg. Always consult your GP before starting significant weight loss, especially if you have health conditions.
Where can I get help with weight management?
Your GP can refer you to NHS weight management services, which vary by region. Private support through online clinical assessments is also available. NHS services are free and include behaviour change support, dietary guidance, and in some cases, prescription weight management medication alongside lifestyle changes.
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.