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 Does a BMI of 24.9 Mean?
A BMI of 24.9 puts you in the healthy weight range according to NHS guidelines. This is an excellent position for long-term health. BMI 24.9 is just within the upper boundary of the healthy category, meaning you're at a healthy weight for your height. Understanding your BMI and how it fits within the broader BMI range UK standards can help you maintain this positive health status. Use our free BMI calculator above to check your personal BMI and see where you fall on the healthy weight spectrum.
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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.
Understanding BMI 24.9 in Context
A BMI of 24.9 is excellent news — it's the highest value within the NHS healthy weight range of 18.5 to 24.9. This means you're at minimal risk of weight-related health conditions compared to those in the overweight BMI threshold category (25.0 and above). The bmi formula (weight in kg ÷ height in metres²) shows your weight is well-balanced for your height.
For context, if you increase your BMI to just 25.0, you move into the overweight category. At 24.9, you remain in the healthy zone. This demonstrates how the bmi categories uk are structured with clear boundaries. Our weight converter and BMI calculator tools above let you explore what small weight changes would mean for your BMI, helping you stay informed about your health position.
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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.
Why BMI Has Limitations
While a healthy BMI of 24.9 is positive, it's important to know that bmi limitations exist. BMI does not account for muscle mass versus fat mass — a muscular person with high muscle density might have a higher BMI but still be very healthy. BMI also ignores where fat is stored on your body; waist circumference matters for cardiovascular risk. The NHS recommends checking your waist measurement alongside BMI: men over 94cm (37 inches) and women over 80cm (31.5 inches) have increased risk even at healthy BMI.
Your GP can provide personalised health assessment beyond BMI alone, considering your individual health history, lifestyle, 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.
Is a BMI of 24.9 considered healthy?
Yes. According to NHS guidelines, a BMI between 18.5 and 24.9 is the healthy weight range. A BMI of 24.9 is at the upper boundary of this healthy range, which means you're at an excellent weight for your height with minimal risk of obesity-related health conditions.
What weight would give me a BMI of 24.9?
This depends entirely on your height. Use our free BMI calculator on this page to find your specific weight range for a BMI of 24.9. For example, at 5ft 8in (173cm), a BMI of 24.9 equals approximately 74.5kg (11st 10lbs). At 5ft 5in (165cm), it's about 67.5kg (10st 8lbs).
What happens if my BMI goes above 24.9?
If your BMI reaches 25.0 or higher, you move into the overweight category according to NHS classifications. This doesn't mean immediate health risk, but it increases the risk of weight-related conditions like type 2 diabetes and high blood pressure. Many people live healthily at BMI 25-29.9, especially if they're fit and active.
Is BMI the only thing I should monitor for health?
No. BMI is one useful screening tool, but it has limitations. The NHS also recommends monitoring your waist circumference (ideal is under 80cm for women, 94cm for men) and considering overall fitness, blood pressure, and cholesterol levels. Your GP can give you a complete health picture.
How can I maintain a BMI of 24.9?
Maintain your current weight through a balanced diet and regular physical activity. Most people sustain healthy weight by eating a varied diet rich in vegetables, whole grains, and lean proteins, and exercising for at least 150 minutes per week. If your weight changes, our free progress tracker can help you log and monitor changes 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.