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 120lbs in Stone?
120 pounds is equivalent to 8 stone and 8 pounds (8st 8lbs), or 54.4 kilograms. In the UK, we commonly express body weight using stone and pounds, so converting between imperial and metric measurements is useful for comparing your weight against NHS health guidance and BMI thresholds. Understanding your weight in different units helps you track progress and engage with UK health information more effectively.
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.
120lbs Weight Conversion Explained
To convert 120 pounds to stone, divide by 14 (since 1 stone = 14 pounds exactly). This gives you 8 stone and 8 pounds. To convert to kilograms, multiply 120 by 0.453592, which equals approximately 54.4kg.
- 120lbs = 8 stone 8 pounds
- 120lbs = 54.4 kilograms
- 120lbs = 120 pounds
Use our free weight converter above to instantly switch between these units. For context, the average UK adult woman weighs approximately 71.6kg (11st 3lbs), and the average UK adult man weighs approximately 85.7kg (13st 7lbs). At 120lbs, you would be significantly below average weight for most adults.
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.
Is 120lbs a Healthy Weight?
Whether 120lbs is healthy depends on your height, age, and overall health. Use our free BMI calculator above to find your personal BMI — this gives you NHS-aligned guidance on healthy weight ranges. For example, if you're 5ft 4in (163cm) tall, a weight of 120lbs gives a BMI of approximately 20.6, which falls in the healthy weight range according to NHS guidelines (18.5–24.9). However, BMI has limitations — it doesn't account for muscle mass or where fat is stored. For personalised advice about whether 120lbs is healthy for you, speak to your GP, who can consider your individual health profile and any weight-related conditions.
- 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 120lbs to stone and pounds?
Divide 120 by 14 to get 8 stone 8 pounds (8st 8lbs). This is the standard UK imperial conversion. You can also use our free weight converter on this page to instantly convert between stone, pounds, and kilograms.
What is 120lbs in kilograms?
120lbs equals approximately 54.4kg. This metric measurement is used in NHS clinical guidance and international health standards, making it useful for comparing your weight against global health thresholds.
Is 120lbs overweight or underweight?
This depends on your height. Calculate your BMI using our free BMI calculator above to see where 120lbs falls for your specific height. Your GP can also give you personalised guidance about whether this weight is healthy for you.
What is the average weight in the UK?
The average UK adult man weighs approximately 85.7kg (13st 7lbs), and the average UK adult woman weighs approximately 71.6kg (11st 3lbs). At 120lbs (54.4kg), you would be below the UK average for most adults.
Can weight loss injections like Wegovy help if I weigh 120lbs?
Weight loss medications such as Wegovy (semaglutide) are prescription-only and available to adults with specific BMI thresholds or weight-related health conditions. Eligibility is assessed individually by a prescriber following a clinical assessment. Speak to your GP if you have concerns about your weight or health.
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.