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
What is 120kg in Stone?
120 kilograms is equal to 18 stone and 12.6 pounds (often rounded to 18st 13lbs). This straightforward conversion uses the standard metric to imperial weight formula. To convert kilograms to stone, divide the kilogram value by 6.35029. Whether you're tracking your health, comparing measurements, or simply need a weight in stone, understanding how to convert between metric and imperial measurements is useful in the UK where stone remains the everyday unit for body weight. Our free weight converter above makes this instant, but knowing the formula helps you understand the conversion principle.
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.
120kg to Stone Conversion & Nearby Values
120kg = 18 stone 12.6 pounds (18st 13lbs)
To convert any weight in kilos in stone, use this formula: kg ÷ 6.35029 = stone. For 120kg: 120 ÷ 6.35029 = 18.91 stone, which breaks down to 18 stone plus 0.91 × 14 pounds = 12.6 lbs.
Here are nearby conversions for reference:
- 110kg = 17st 5.6lbs
- 115kg = 18st 1.2lbs
- 120kg = 18st 12.6lbs
- 125kg = 19st 8.4lbs
- 130kg = 20st 6.2lbs
Use the weight converter on this page to switch between kg, stone, and pounds 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.
120kg Health Context & BMI at Different Heights
At 120kg, your health profile depends significantly on height. For an average UK adult male height of 175cm (5ft 9in), 120kg gives a BMI of approximately 39.2, which falls in the obese (Class III) category according to NHS guidelines. For a female height of 162cm (5ft 4in), the same weight produces a BMI of around 45.6. Use our free BMI calculator above to check your personal BMI instantly based on your exact height and weight. A healthy weight range at most heights would be considerably lower, though the right weight for you depends on your individual circumstances, muscle mass, and medical history. Your GP can provide personalised guidance on healthy weight targets.
- 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.
How do I convert 120kg to stone manually?
Divide 120 by 6.35029 to get 18.91 stone. The decimal (0.91) converts to pounds by multiplying by 14: 0.91 × 14 = 12.6 pounds. So 120kg = 18 stone 12.6 pounds. Use the weight converter above for gradual improvement without calculation.
What is a healthy weight at 120kg?
A healthy weight depends on your height, age, and body composition. At most adult heights, 120kg is above the NHS healthy weight range (BMI 18.5–24.9). Calculate your personal BMI using the calculator on this page, then speak with your GP about targets suited to your individual health.
Is 120kg considered obese?
At 120kg, most UK adults would have a BMI in the obese category, though this depends on height. Taller individuals may have a lower BMI at this weight. BMI is a screening tool only—it doesn't account for muscle mass. Your GP can assess what 120kg means for your specific health.
How many pounds is 120kg?
120kg equals approximately 264.6 pounds. This converts to 18 stone 12.6 pounds in traditional UK stone-and-pounds format. Both measurements are useful depending on context—the weight converter above handles instant conversion between any units.
What is the conversion formula from kg to stone?
Divide kilograms by 6.35029 to get stone. The formula is: kg ÷ 6.35029 = stone. To convert the decimal portion to pounds, multiply by 14. For example: 120 ÷ 6.35029 = 18.91 stone, then 0.91 × 14 = 12.6 pounds.
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.