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
13 Stone 5 in Pounds — What You Need to Know
13 stone 5 pounds is equal to 187 pounds exactly. In metric terms, this weight converts to approximately 84.8 kg. Understanding your weight across different measurement systems is helpful for accessing NHS guidance, using health information online, and tracking progress with weight management tools. Our free weight converter above can instantly convert between stone, pounds, and kilograms — making it easy to compare UK measurements with health resources that use different units.
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.
Where Does 13 Stone 5 Fit on the NHS Scale?
At 13 stone 5 pounds (187 lbs / 84.8 kg), your health context depends entirely on your height and overall fitness. Use our free BMI calculator on this page to determine your personal BMI — this is the NHS-recommended screening tool for UK adults. According to NHS guidance, a healthy BMI is between 18.5 and 24.9. If your BMI falls above 30, you may be classified as obese; between 25 and 29.9 is overweight. It's important to remember that BMI does not account for muscle mass, so if you're very fit or athletic, you should discuss your weight with your GP for personalised advice. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds, so ethnicity-adjusted assessments may apply.
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.
Understanding Your Weight in UK Health Context
Weight management in the UK is supported by NHS services at multiple tiers — from self-help programmes and digital tools (Tier 1) through to specialist weight management services (Tier 3) where prescription weight loss support may be considered. If you're concerned about your weight and its impact on your health, your first step is to speak with your GP, who can assess your individual situation and discuss whether lifestyle changes, structured weight loss programmes, or medical support might be appropriate. Recording your weight regularly using our free progress tracker can help you monitor trends and share meaningful data with your healthcare team.
- 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 13 stone 5 pounds in kilograms?
13 stone 5 pounds equals approximately 84.8 kg. To convert stone and pounds to kilograms, multiply the stone by 6.35029 and add the pounds multiplied by 0.453592. This metric measurement is useful when comparing UK weight with international health guidelines or online calculators.
How does 13 stone 5 compare to average UK weight?
The average UK adult weighs approximately 13st 7lbs (for men) or 11st 3lbs (for women). At 13st 5lbs, you're close to the average for UK men. However, average weight is not the same as healthy weight — your NHS BMI is what matters for health assessment.
What BMI would I have at 13 stone 5?
Your BMI at 13 stone 5 depends on your height. Use our BMI calculator above to enter your exact height and get your personal BMI. This gives you an NHS-aligned assessment of whether this weight falls within a healthy range for your stature.
Should I aim to lose weight at 13 stone 5?
Whether weight loss is appropriate depends on your BMI, your health conditions, and your GP's assessment. Never aim for weight loss based on a specific number alone — focus on BMI and health outcomes. Speak with your GP if you're concerned about your weight and its health impact.
How can I track weight changes from 13 stone 5?
Our free progress tracker lets you log your weight regularly in stone, pounds, or kilograms. Tracking helps you see trends over weeks and months, making it easier to discuss progress with your GP or weight management services if you decide to make 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.