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
120 Kilograms in Stone — UK Conversion and Health Context
120 kilograms equals 18 stone and 12.8 pounds in UK measurements. This conversion uses the standard formula of dividing kilograms by 6.35029 to get stone. For context, 120kg falls into the obese category according to NHS guidelines for most adults, though the specific health implications depend on your height, age, and overall fitness level. Use our free weight converter above to switch between kg, stone, and pounds instantly.
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.
Converting 120kg to Stone and Understanding Your Weight
To convert 120kg to stone, divide 120 by 6.35029, which gives you 18 stone 12.8 pounds. This exact conversion is reliable for any UK health guide or medical context. If you prefer just pounds, 120kg equals approximately 264.6 lbs.
- 120kg in stone: 18st 12.8lbs
- 120kg in pounds: 264.6 lbs
- Conversion formula: kg ÷ 6.35029 = stone
Using our free weight converter on this page, you can instantly switch between these units. Understanding your weight in stone is helpful for tracking progress, discussing health with your GP, and using NHS health information resources that often reference weight in both metric and imperial units.
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.
120kg BMI and Health Weight Context
At 120kg, your BMI depends entirely on your height. For example, if you're 5ft 7in (170cm) tall, a weight of 120kg gives a BMI of 47.2, which falls into the severely obese category (BMI 40+). If you're taller—say 6ft 2in (188cm)—your BMI would be around 38.8, still in the obese range. The NHS recommends a healthy BMI of 18.5 to 24.9 for most adults. Use our free BMI calculator above to find your personal BMI instantly and see your healthy weight range. Even a modest weight loss of 5–10% can bring meaningful health benefits.
- 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 120kg in stone?
120kg equals 18 stone and 12.8 pounds (18st 12.8lbs). To convert kilograms to stone, divide the kg amount by 6.35029. This is the standard UK conversion used in health and medical contexts.
Is 120kg overweight for all heights?
At 120kg, your health status depends on your height. Taller adults will have a lower BMI than shorter adults at the same weight. Use our free BMI calculator on this page to check your personal BMI and see whether you fall in the healthy, overweight, or obese category.
What is the healthy weight range for 120kg?
The healthy weight range depends on your height. For someone 5ft 7in, the healthy range is roughly 53–71kg. For someone 6ft tall, it's around 65–88kg. Your GP can advise you on a healthy weight goal specific to your health profile and fitness level.
How can I track weight loss from 120kg?
Use our free progress tracker to log your weight regularly and see trends over time. Track your weight weekly in both kg and stone. Progress trackers help you stay motivated and identify sustainable patterns rather than focusing on single weigh-ins.
Can prescription weight loss medication help at 120kg?
Some adults with a BMI of 40+ (or 35+ with health conditions) may be eligible for prescription weight loss support through NHS specialist services or a licensed prescriber. This is assessed individually. Our GLP-1 weight loss calculator can show projected outcomes with medication support.
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.