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 140kg In Stone?
140 kilograms is equivalent to 22 stone and 1 pound (22st 1lb). In the UK, we commonly use stone and pounds for body weight, so this conversion helps you understand your weight in familiar measurements. Whether you're tracking your weight, preparing for a health appointment, or simply curious about the conversion, knowing how to translate between metric and imperial units is useful. Use our free weight converter above to check conversions instantly, or read on to understand what this weight means for your health according to NHS guidance.
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.
140kg BMI and UK Health Context
At 140kg, your BMI depends on your height — this is why our free BMI calculator above is helpful for getting your personal figure. For example, an adult who is 1.73m tall (5ft 8in) with a weight of 140kg would have a BMI of approximately 46.8, which falls into the severely obese (Class III) category according to NHS guidelines. The healthy BMI range for UK adults is 18.5 to 24.9. BMI is a screening tool that helps identify potential health risks, though it doesn't account for muscle mass or where fat is stored.
- A BMI above 40 is associated with increased risk of type 2 diabetes, heart disease, and certain cancers
- For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — starting at BMI 27.5 and above for overweight category
- Even modest weight loss of 5–10% can improve blood pressure, blood sugar control, and reduce health risks
Your GP can provide personalised NHS health advice about what your weight means for your individual health profile.
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.
Weight Management and UK Resources
If you're concerned about your weight, the NHS offers several pathways to support. The first step is speaking with your GP, who can assess your overall health and discuss options tailored to you. NHS weight management services are available in most areas, ranging from free digital tools and community programmes to specialist services.
- NHS Tier 1: Self-help digital tools and community weight loss programmes
- NHS Tier 2: Primary care-based behaviour change support
- NHS Tier 3/4: Specialist weight management services, where prescription medications may be discussed
Track your progress with our free progress tracker, or use our GLP-1 weight loss calculator if you're exploring medication options 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.
Is 140kg considered overweight or obese in the UK?
At 140kg, BMI status depends on your height, but most adults at this weight would fall into the obese or severely obese category according to NHS BMI guidelines. Your GP can give you personalised advice about your health risk. Use our free BMI calculator above to find your personal BMI.
What is the healthy weight range for someone 140kg now?
A healthy weight depends on your height, age, sex, and muscle mass. For example, an adult 1.73m tall would have a healthy weight range of approximately 55–74kg. Your GP can advise on a realistic and healthy target weight for you based on your individual circumstances.
How can I convert 140kg to stone more easily?
Simply divide 140 by 6.35029 to get stone (140 ÷ 6.35 = 22.05 stone = 22st 1lb). Our free weight converter on this page does this instantly — just enter your weight and select your units.
What does the NHS recommend for weight loss at 140kg?
The NHS recommends losing weight at a safe rate of 0.5–1kg per week through a calorie deficit, alongside increased physical activity. If you have a BMI above 40, your GP may discuss specialist weight management services or prescription options.
Should I speak to my GP about my weight at 140kg?
Yes. A GP can assess your overall health, discuss any weight-related health conditions, and help you explore appropriate support options — whether that's lifestyle changes, weight management programmes, or specialist services. They can also rule out any underlying medical conditions affecting your weight.
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.