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
Kg to Stone Calculator — Convert Weight Instantly
Converting kilograms to stone is quick and easy using our free online calculator. Simply enter your weight in kg and get an instant conversion to stone and pounds — the measurements most UK adults use daily. Whether you're checking your health progress, understanding NHS clinical data, or comparing international weight measurements, this guide provides everything you need to convert kg to stone accurately and understand why the UK uses these unique measurements.
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.
Complete Kg to Stone Conversion Table for UK Adults
Use this comprehensive kg to stone conversion table to find your weight instantly. The table covers the typical adult weight range from 40kg to 150kg, with equivalent values in stone and pounds. Simply locate your weight in kilograms on the left, then read across to see the stone and pounds equivalent.
Quick conversion formula: Divide your weight in kg by 6.35029 to get stone, or multiply by 2.20462 to get pounds. For example, 70kg ÷ 6.35029 = 11 stone, or 70kg × 2.20462 = 154.3 pounds.
This standard metric to imperial conversion is used consistently across UK health services, fitness tracking, and personal health monitoring. The conversion table embedded above allows you to quickly find any weight between 40kg and 150kg without a UK pharmacy calculation. Use our free weight converter tool above to check any specific weight instantly.
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.
Why the UK Uses Stone and Why You Need Both Measurements
The UK is one of the few countries that uses stone and pounds for body weight, while most of Europe uses kilograms exclusively. Clinically, the NHS records weight in kilograms for accuracy and consistency with international medical standards. However, UK adults typically discuss their weight in stone and pounds — this cultural measurement remains deeply embedded in everyday conversation, clothing sizes, and diet programmes.
Understanding both measurements is essential. Your GP may record your weight in kg, but you'll likely weigh yourself at home in stone and pounds. Your BMI is calculated the same way regardless of unit — use our free BMI calculator above to check your BMI instantly, which works with either measurement system. Knowing how to convert between kg and stone helps you understand your health data fully and track progress consistently.
- 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 the exact formula for converting kg to stone?
Divide kilograms by 6.35029 to get stone. For example: 80kg ÷ 6.35029 = 12.6 stone (or 12 stone 8 pounds). To convert to pounds instead, multiply kg by 2.20462. The reverse works too: stone × 6.35029 = kg, or pounds ÷ 2.20462 = kg.
How do I convert 70kg to stone and pounds?
70kg equals approximately 11 stone and 0.1 pounds (or 11st 0lbs). Using the formula: 70 ÷ 6.35029 = 11.03 stone. This falls within the healthy weight range for many UK adults, depending on height. Check your personal healthy weight range using our free BMI calculator above.
Why does the UK use stone instead of kilograms for weight?
The UK traditionally used imperial measurements including stone for body weight, and this cultural habit persists despite metric adoption in most other areas. The NHS uses kg clinically for medical accuracy and international consistency, but UK adults still prefer stone and pounds for everyday discussions. Both measurements are equally valid — it's simply a matter of what you're familiar with.
Is there a quick way to estimate stone from kilograms without a calculator?
Yes — divide kg by 6.35 and round to the nearest whole number. For rough estimates, remember that 6kg ≈ 1 stone. So 60kg ≈ 10 stone, 70kg ≈ 11 stone, 80kg ≈ 12.6 stone. For exact conversions, use our free weight converter tool above or the conversion table provided.
How do I convert stone and pounds back to kilograms?
Multiply stone by 6.35029, then multiply any pounds by 0.453592, and add them together. Example: 11 stone (11 × 6.35029 = 69.85kg) plus 2 pounds (2 × 0.453592 = 0.91kg) = 70.76kg total. Our weight converter handles this automatically for you.
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.