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
87 Kg in Stones — Is This a Healthy Weight?
87 kilograms is approximately 13 stone and 9 pounds. Whether this weight is healthy depends entirely on your height, age, and body composition. Using our free BMI calculator above, you can instantly check where your weight falls on the NHS health scale. This guide explains how to convert kilos to stone, shows you healthy weight ranges for different heights, and helps you understand if 87kg is right for your body.
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.
Healthy Weight Ranges at Different Heights
To find out if 87kg is healthy for you, you need to know your height. A weight of 87kg gives very different BMI results depending on how tall you are. Below are three real-world examples showing how height changes whether 87kg falls within the NHS healthy weight range:
- At 160cm (5ft 3in): 87kg = BMI 33.9 (obese category) — healthy range would be 47–63kg
- At 173cm (5ft 8in): 87kg = BMI 29.1 (overweight category) — healthy range would be 55–74kg
- At 183cm (6ft): 87kg = BMI 25.9 (overweight, near healthy boundary) — healthy range would be 62–83kg
The NHS defines a healthy BMI as 18.5 to 24.9. You can use our weight converter to switch between metric and imperial measurements, and our BMI calculator will show you exactly where 87kg fits for your personal height.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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 You're Outside the Healthy Range
If 87kg is above your healthy weight range: Start by measuring your waist circumference. The NHS warns that where fat is stored matters — men with waist over 94cm and women over 80cm face increased health risks, even at lower BMIs. Consider speaking with your GP about sustainable changes: a calorie deficit of around 500 kcal daily supports weight loss of roughly 0.5kg per week. You might also track your progress using our free progress tracker to monitor your journey alongside a reduced-calorie diet and increased physical activity.
If 87kg is within your healthy range: Maintain your current weight through balanced nutrition and regular exercise. Remember that BMI is one tool among many — your GP can provide personalised health advice based on your full picture.
- 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 87kg in stone and pounds?
87 kilograms converts to 13 stone and 9.1 pounds. To convert kilograms to stone, divide by 6.35. Use our free weight converter above for instant conversions between kg, stone, and lbs.
Is 87kg a healthy weight?
It depends on your height. At 173cm (5ft 8in), 87kg gives a BMI of 29.1 (overweight). At 183cm (6ft), it's 25.9 (just overweight). Use the BMI calculator on this page to check your personal result instantly.
What weight range is healthy for my height?
The NHS healthy BMI range is 18.5 to 24.9. To find your healthy weight range, multiply your height in metres squared by 18.5 (lower bound) and 24.9 (upper bound). For example, at 1.73m: healthy range is 55–74kg.
How quickly can I lose weight safely?
The NHS recommends losing 0.5 to 1 kilogram per week for sustainable results. This typically requires a calorie deficit of around 500 kcal daily, alongside regular physical activity and balanced eating habits.
Should I see my GP if I'm concerned about my weight?
Yes. Your GP can assess your personal health picture, including waist measurement and any weight-related health conditions, and offer tailored advice. They can also discuss whether lifestyle changes or further support would help.
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.