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 87.5 Kilos a Healthy Weight?
87.5 kilograms converts to 13 stone and 11 pounds (13st 11lbs) in UK measurements. Whether this weight is healthy depends entirely on your height, age, and overall health. Using our free BMI calculator above, you can check where your weight falls on the NHS health scale. For some adults, 87.5kg is a healthy weight; for others, it may indicate overweight or obesity. This guide explains how to assess your personal health context and what the NHS recommends.
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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 87.5kg (13st 11lbs), whether you're in a healthy weight range depends on your height. Use the examples below to see how this weight compares to NHS guidelines for adults of different heights:
- At 160cm (5ft 3in): 87.5kg gives a BMI of 34.0 — this falls in the obese category. Healthy weight range: 47–64kg (7st 5lbs to 10st 1lbs).
- At 173cm (5ft 8in): 87.5kg gives a BMI of 29.3 — this falls in the overweight category. Healthy weight range: 55–75kg (8st 8lbs to 11st 11lbs).
- At 185cm (6ft 1in): 87.5kg gives a BMI of 25.6 — this falls just above the healthy weight range into overweight. Healthy weight range: 63–87kg (9st 13lbs to 13st 10lbs).
These examples show how the same weight produces very different health contexts depending on height. To convert kilograms to stone accurately and check your personal BMI, use 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 Guidance and What to Do Next
The NHS recommends a healthy BMI between 18.5 and 24.9 for most UK adults. If you're 87.5kg and your BMI is above 25, the NHS suggests taking steps to reach a healthier weight range. This doesn't mean extreme changes — even a 5–clinically studied weight loss can improve blood pressure, cholesterol, and blood sugar levels.
Waist measurement also matters: Men with a waist over 94cm (37in) and women over 80cm (31.5in) have increased health risks, even at a healthy BMI. If you're concerned about your weight or health, book an appointment with your GP, who can assess your individual circumstances and discuss weight management options if appropriate.
- 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 87.5kg in stones and pounds?
87.5 kilograms equals 13 stone and 11 pounds (13st 11lbs). To convert kilograms to stone, divide the kilogram value by 6.35. You can also use our free weight converter above for instant metric to imperial weight conversion.
Is 87.5kg overweight?
It depends on your height. At 160cm, 87.5kg is obese (BMI 34). At 173cm, it's overweight (BMI 29.3). At 185cm, it's just above healthy (BMI 25.6). Use our free BMI calculator to check your personal BMI and see where you fall on the NHS health scale.
What's the healthy weight range for my height?
Healthy weight ranges vary by height. For example, a healthy weight at 173cm is 55–75kg (8st 8lbs to 11st 11lbs). Calculate your personal healthy weight range using the BMI calculator on this page — it accounts for your exact height and shows the NHS-recommended range.
Should I lose weight if I'm 87.5kg?
Only your GP can advise whether weight loss is right for you personally. If your BMI is above 25 or your waist measurement exceeds NHS thresholds, your GP may recommend weight management. Even 5–clinically studied weight loss can improve health markers. Book an appointment to discuss your individual health context.
How can I track weight loss from 87.5kg?
Use our free progress tracker to log your weight and monitor changes over time. The tracker helps you see trends and stay motivated. Combine tracking with a balanced diet, physical activity, and support from your GP or a weight management service for best results.
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.