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
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What Is The Ideal Weight For A 5'3" Female?
The ideal weight for a 5'3" female depends on your individual health, but NHS guidelines define a healthy weight range based on BMI. For a woman who is 5'3" (160cm), the healthy weight range is approximately 47.4 kg to 63.5 kg (7st 6lbs to 10st 0lbs). This corresponds to a BMI between 18.5 and 24.9, which the NHS recognises as a healthy weight for most adults. However, ideal weight is personal — genetics, muscle mass, and overall health matter more than a single number. Your GP can give you personalised advice about what's right for you.
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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.
Healthy Weight Range For 5'3" — BMI Breakdown
At a height of 5'3" (160cm), the NHS healthy weight range is 47.4 kg to 63.5 kg, equivalent to 7 stone 6 pounds to 10 stone 0 pounds. This range is calculated using the BMI formula where a healthy BMI sits between 18.5 and 24.9.
- Lower healthy weight: 47.4 kg (7st 6lbs) = BMI 18.5
- Upper healthy weight: 63.5 kg (10st 0lbs) = BMI 24.9
- Overweight threshold: 64 kg (10st 1lb) = BMI 25.0
- Obese threshold: 76.8 kg (12st 1lb) = BMI 30.0
If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds. For these groups, a healthy BMI starts at 18.5 but the upper limit is 22.9 rather than 24.9. This reflects higher health risks at the same BMI level for these populations. Use our free BMI calculator above to check where you currently sit and understand your personal healthy weight range.
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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.
How To Find Your Personal Ideal Weight
Ideal weight is not one-size-fits-all. Two women at 5'3" with the same weight can have completely different body compositions — one may have more muscle, the other more fat. This is why BMI alone doesn't tell the full story. Factors that influence your ideal weight include: genetics, muscle mass, bone density, age, and any underlying health conditions.
The NHS healthy weight range provides a framework, but your personal ideal weight within that range depends on your individual circumstances. A GP or registered dietitian can help you determine a realistic, sustainable target weight based on your health history and goals. The key is finding a weight at which you feel healthy, energetic, and can maintain long-term — not a number that looks good on paper but feels impossible to achieve.
- 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 there a single "ideal" weight for all 5'3" females?
No. While the NHS healthy weight range for a 5'3" woman is 47.4–63.5 kg (7st 6lbs–10st 0lbs), your personal ideal weight depends on genetics, muscle mass, bone density, and health conditions. Two people at the same weight can have very different body compositions. Your GP can help identify a realistic target within the healthy range.
How do I calculate my healthy weight range at 5'3"?
Use the BMI formula: weight (kg) ÷ height (m)². For a healthy BMI of 18.5–24.9 at 5'3" (1.6m), multiply: 18.5 × 1.6² = 47.4 kg (lower), and 24.9 × 1.6² = 63.5 kg (upper). Our free BMI calculator above does this instantly for you.
What if I'm 5'3" and of South Asian or Black African heritage?
The NHS recommends lower BMI thresholds for South Asian, Chinese, Black African, and Black Caribbean adults due to higher cardiovascular and diabetes risk at the same BMI. For these groups, a healthy BMI is 18.5–22.9 rather than 18.5–24.9, making the upper healthy weight approximately 59.5 kg (9st 5lbs) instead of 63.5 kg.
What's the difference between healthy weight and average UK weight?
Healthy weight is based on BMI guidelines (47–64 kg for a 5'3" woman). Average UK weight is what most people actually weigh — typically higher. The average UK adult woman weighs around 71.6 kg (11st 3lbs), which is above the healthy range for most heights. Healthy weight and average weight are different targets.
Should I aim for the lower or upper end of the healthy weight range?
Either end of the healthy range (47.4–63.5 kg for 5'3") is medically healthy. Your ideal target depends on your muscle mass, frame size, and how you feel. Someone very muscular may naturally sit toward the upper end; someone with a smaller frame may feel best at the lower end. Work with your GP or a dietitian to find your personally sustainable target.
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.