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 25 Mean for Women?
A BMI of 25 for women falls within the healthy weight range according to NHS guidelines. This means your weight is in a position associated with lower health risks compared to overweight or obese categories. However, BMI is just one screening tool — it doesn't account for muscle mass, bone density, or where fat is stored on your body. Your overall health depends on many factors beyond a single number. Use our free BMI calculator above to check your personal BMI instantly and understand where you fall on the NHS scale.
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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.
BMI 25 and the NHS Healthy Weight Range
According to NHS guidelines, a healthy BMI ranges from 18.5 to 24.9. A BMI of 25 places you just above this threshold, technically in the overweight category (25.0–29.9). This is important to understand: at 25 BMI, you're at the boundary between healthy and overweight, meaning you have options to either maintain your current weight or make modest adjustments.
For example, if you're 5ft 6in (168cm) tall, a BMI of 25 corresponds to approximately 68kg (10st 10lbs). To fall back into the healthy weight range (18.5–24.9 BMI) at this height, a weight of 55–67kg (8st 9lbs to 10st 7lbs) would be the target range. The overweight BMI threshold starts at exactly 25.0, so even small weight adjustments can shift your category. Many women at this BMI feel healthy and energetic, whilst others may want to work towards the lower healthy range depending on their individual circumstances and any weight-related health conditions.
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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.
BMI Limitations and What Else Matters
BMI has significant limitations. It cannot distinguish between muscle and fat — athletes or very fit individuals may have a BMI of 25 or higher despite low body fat. BMI also doesn't account for where fat is distributed. Research shows that fat stored around the waist (apple shape) carries higher health risks than fat stored on hips and thighs (pear shape).
The NHS recommends using waist circumference alongside BMI. For women, a waist measurement over 80cm (31.5 inches) indicates increased health risk, and over 88cm (34.5 inches) indicates high risk, regardless of BMI. Age, family history, lifestyle, blood pressure, and cholesterol levels are all important health markers. Use our free weight converter to track measurements in your preferred units, and discuss your overall health picture with your GP rather than focusing on BMI alone.
- 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 25 considered healthy?
According to NHS guidelines, a BMI of 25 falls just above the healthy range (18.5–24.9) and is classified as overweight. However, you're at the lower boundary, and many people at this weight feel well and have no health concerns. BMI is a screening tool, not a definitive health measure — your GP can assess your overall health context.
What weight would give me a BMI of 25 at my height?
BMI depends on both weight and height. Use our free BMI calculator above to find your exact BMI. Alternatively, the formula is: BMI = weight (kg) ÷ height (m)². For example, at 5ft 6in (168cm), a weight of approximately 68kg (10st 10lbs) gives a BMI of 25. Your own result may differ based on your individual height.
Should I aim to lose weight if my BMI is 25?
This is a personal decision based on your overall health, not BMI alone. If you feel well, have no weight-related health conditions, and your waist circumference is healthy, weight loss may not be necessary. If you have high blood pressure, diabetes risk, or other health concerns, your GP can advise whether modest weight loss would be beneficial for you personally.
What's the difference between a BMI of 25 and 24.9?
Mathematically, 25.0 is the official threshold where NHS categories change from healthy weight to overweight. However, this is an arbitrary boundary — a BMI of 24.9 and 25.0 represent virtually identical health risk. Don't focus on crossing this exact line; instead, monitor your overall health indicators like blood pressure, fitness level, and how you feel.
How accurate is BMI for women specifically?
BMI uses the same formula for everyone regardless of sex, but women tend to have naturally higher body fat percentages than men at the same BMI. A BMI of 25 may represent different body compositions in different women depending on muscle mass and fitness level. Waist circumference and overall lifestyle factors give a more complete picture of your health than BMI alone. ```
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.