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's the Ideal Weight for a 5'9 Female?
For a 5'9 (175cm) female, the healthy weight range according to NHS guidelines is approximately 58–78kg, or 9 stone 2 pounds to 12 stone 4 pounds. This range is based on a BMI of 18.5 to 24.9, which the NHS considers healthy for most adults. However, ideal weight varies significantly between individuals depending on muscle mass, frame size, age, and ethnicity. Your GP can provide personalised advice about what weight is healthy for you specifically.
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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 5'9 Females
The healthy weight range for a 5'9 female is calculated using BMI (body mass index) guidelines:
- Lower healthy limit: 18.5 × (1.75)² = 56.6kg (8st 13lbs)
- Upper healthy limit: 24.9 × (1.75)² = 76.2kg (12st)
In practical terms, most health professionals would suggest 58–78kg (9–12st 4lbs) as a realistic healthy range. Use our free BMI calculator above to find your personal BMI and see where your weight falls within NHS categories. The healthy weight calculator on this page instantly shows whether your current weight is in the healthy, overweight, or obese range for your height. Average UK female weight is around 71.6kg (11st 3lbs), though this is above the healthy weight range for most heights.
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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.
Factors That Affect Your Ideal Weight
Ideal weight is not one-size-fits-all. Key factors include muscle mass (muscle is denser than fat, so more muscular women may weigh more at a healthy body composition), frame size (small-framed women may feel healthy at the lower end, large-framed women at the upper end), age (metabolism changes with age), and ethnicity (NHS recommends lower BMI thresholds for South Asian, Chinese, and Black African/Caribbean women due to higher health risks at the same BMI). Pregnancy, medical conditions, and medications also affect weight. Rather than focusing solely on a number, monitor how you feel, your energy levels, and health markers like blood pressure and blood sugar.
- 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 75kg healthy for a 5'9 female?
Yes, 75kg (11st 11lbs) falls comfortably within the healthy weight range (BMI ~24.5) for a 5'9 female. This is below the upper limit of 78kg and well within NHS healthy weight guidelines. Check your personal BMI using our free BMI calculator to confirm.
What's the average weight for a 5'9 female in the UK?
Average UK female weight is approximately 71.6kg (11st 3lbs), though this varies by age and region. However, average weight differs from healthy weight—the NHS healthy range for 5'9 is 58–78kg. Many UK adults weigh above the healthy range.
Should I aim for the lower or upper end of the healthy weight range?
Your ideal weight within the healthy range depends on frame size, muscle mass, and personal health markers. A small-framed woman may feel healthy at 60kg, while a larger-framed woman may be healthy at 75kg. Discuss this with your GP rather than targeting a specific number.
How is ideal weight calculated for height?
Ideal weight for height is typically calculated using BMI (body mass index), which divides weight in kg by height in metres squared. NHS uses a healthy BMI of 18.5–24.9. Our weight converter and BMI calculator help you find your healthy range instantly.
Does age affect ideal weight for a 5'9 female?
Yes, metabolism slows with age, and muscle mass naturally decreases, which can affect ideal weight. Women in their 20s–30s may maintain a healthy weight at the upper end of the range, while older women may find the lower–middle range more sustainable. Your GP can advise based on your age and 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.