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 The Healthy Weight For A 5'5 Female?
For a 5'5 (165cm) female, the healthy weight range according to NHS guidelines is approximately 50–67 kg (7st 12lbs–10st 7lbs). This is based on achieving a BMI between 18.5 and 24.9, which the NHS considers a healthy range for adult women. Your ideal body weight depends on your individual frame size, muscle mass, and overall health — this range provides a general target. Use our free BMI calculator above to find your personal healthy weight range instantly.
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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.
Healthy Weight Range For 5'5 Females Using BMI
At 5'5 (165cm), a healthy BMI falls between 18.5 and 24.9 according to NHS guidelines. This translates to a healthy weight range of 50–67 kg (7st 12lbs to 10st 7lbs) for most women of this height.
However, if you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends using a lower threshold — a healthy BMI of 18.5–22.9. For this group at 5'5, the healthy weight range would be approximately 50–60 kg (7st 12lbs–9st 6lbs).
These ranges are based on population-level health data. Your GP can advise on what a healthy weight means for your individual health situation, taking into account your fitness level, muscle mass, and any existing health conditions. Remember that BMI doesn't distinguish between muscle and fat — two women at the same height and weight can have very different body compositions.
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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.
Using The BMI Calculator To Find Your Ideal Weight
The most accurate way to determine your personal healthy weight is to calculate your BMI using your actual measurements. Our free BMI calculator on this page takes your height and weight and instantly shows you which NHS category you fall into — whether that's healthy weight, overweight, or another range.
If you're currently outside the healthy weight range, even a modest weight loss of 5–10% of your body weight can bring meaningful health benefits. You can also use our free weight converter to switch between kg, stone, and pounds, making it easy to track your progress in whichever measurement you prefer. If you have concerns about your weight or health, your GP can provide personalised guidance based on your medical history and circumstances.
- 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 5'5 considered average height for UK women?
The average UK adult woman is approximately 161.6cm (5'3.5). At 5'5 (165cm), you're slightly taller than average but within the typical range. Height variation is normal and doesn't affect the BMI healthy weight calculations — your healthy weight range is determined by your specific height and the NHS BMI thresholds.
What if I have a muscular build — is the BMI healthy weight range still accurate?
BMI is a screening tool that doesn't distinguish between muscle and fat. If you're athletic or have significant muscle mass, you may have a higher BMI but still be healthy. Your GP or a fitness professional can assess body composition more accurately. Waist circumference is also a useful indicator — the NHS recommends below 80cm for women.
How quickly should I aim to reach a healthy weight?
The NHS recommends losing weight at a sustainable rate of 0.5–1 kg (1–2 lbs) per week. Faster weight loss can lead to muscle loss and isn't sustainable long-term. Most people benefit from combining a modest calorie deficit with increased physical activity and may find it helpful to track progress using our free progress tracker.
Can I use an ideal weight calculator instead of BMI?
Several ideal weight formulas exist (like the Devine or Robinson formulas), but they provide only a rough estimate. The NHS healthy weight range based on BMI 18.5–24.9 is more evidence-based and accounts for individual variation better. Use our free healthy weight calculator above for a personalised range based on your height.
Should I aim for the lower or upper end of the healthy weight range?
There's no single "ideal" weight — anywhere within the healthy BMI range (18.5–24.9) is appropriate for your health. The lower end isn't better than the upper end. Your target should depend on your starting point, your health goals, and what feels sustainable for you long-term. Your GP can advise if a specific target would benefit your 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.