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 BMI Does 124kg Give You?
124kg converts to 19 stone 7 pounds, but your BMI depends entirely on your height. At different heights, 124kg produces very different BMI results — ranging from healthy weight to obese categories according to NHS guidelines. Use our free BMI calculator above to find your exact BMI by entering your height, or read on to see example BMI values at common UK heights and understand what these mean for your health.
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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.
124kg BMI at Different Heights
To convert kilograms to stone, 124kg equals 19 stone 7 pounds exactly. However, BMI is calculated using both weight and height, so the same weight produces different BMI results depending on how tall you are:
- At 160cm (5ft 3in): BMI = 30.5 (obese category, NHS)
- At 165cm (5ft 5in): BMI = 29.4 (overweight, NHS)
- At 170cm (5ft 7in): BMI = 27.1 (overweight, NHS)
- At 175cm (5ft 9in): BMI = 25.1 (overweight, NHS)
- At 180cm (5ft 11in): BMI = 23.2 (healthy weight, NHS)
- At 190cm (6ft 3in): BMI = 20.8 (healthy weight, NHS)
Each height category shows how the same weight of 124kg produces different health outcomes. For South Asian, Chinese, Black African, or Black Caribbean adults, lower BMI thresholds apply — your GP can advise on what your specific BMI means for you.
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.
Understanding NHS BMI Categories
The NHS BMI categories are: underweight (below 18.5), healthy weight (18.5–24.9), overweight (25.0–29.9), and obese (30.0 and above). At 124kg, whether you fall into overweight or obese depends on your height, as shown above. BMI has limitations — it does not distinguish between muscle and fat, so athletes may have high BMI but low body fat. Waist measurement also matters: NHS recommends under 94cm (37in) for men and 80cm (31.5in) for women as markers of lower health risk. For personalised guidance on what your weight and BMI mean for your individual health, speak with your GP, who can consider your full health picture alongside your measurements.
- 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 124kg in stone and pounds exactly?
124kg converts to 19 stone 7 pounds (19st 7lbs). To calculate this, divide 124 by 6.35029 to get stone, then multiply any decimal remainder by 14 to get pounds. This kilogram to stone conversion uses the standard metric to imperial weight formula used across the UK.
Is 124kg a healthy weight?
At 124kg, whether you're at a healthy weight depends on your height. Taller individuals may fall in the healthy BMI range (18.5–24.9), whilst shorter individuals may be overweight or obese. Use our BMI calculator above to enter your height and get your exact BMI result instantly.
What health risks are associated with a BMI in the obese range?
A BMI of 30 or above (obese category) is associated with increased risk of type 2 diabetes, high blood pressure, heart disease, certain cancers, and joint problems. Even a 5–10% reduction in body weight can significantly lower these risks. Your GP can discuss personalised health management options with you.
How do I know if 124kg is overweight for my height?
Check your BMI using our free BMI calculator on this page — enter your weight (124kg) and height, and it will instantly show you whether you fall into the healthy, overweight, or obese category according to NHS guidelines. BMI is the standard screening tool used by UK healthcare services.
Can I lose weight sustainably from 124kg?
Yes. The NHS recommends losing weight at a rate of 0.5–1kg per week through a combination of dietary changes and increased physical activity. Our free progress tracker can help you log and monitor your weight loss journey over time.
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.