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 a Healthy Weight for a 5'9 Female?
If you're 5'9 (175 cm) tall, a healthy weight according to NHS guidelines falls between 8 stone 9 lbs and 11 stone 9 lbs (55 to 74 kg). This range is based on a healthy BMI of 18.5 to 24.9, which is the standard used by the NHS for UK adults. Your ideal weight depends on factors like muscle mass, bone density, and overall fitness level. Use our free BMI calculator above to discover your personal healthy weight range and see where you currently fall within the NHS framework.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 in Kilograms and Stone
For a female who is 5'9 (175 cm) tall, the healthy weight range is 55 to 74 kg, which converts to 8 stone 9 lbs to 11 stone 9 lbs in imperial measurements.
- Lower healthy limit: 55 kg (8st 9lbs) — BMI 18.5
- Upper healthy limit: 74 kg (11st 9lbs) — BMI 24.9
- Midpoint: 64.5 kg (10st 2lbs) — BMI 21.1
This healthy weight range is calculated using the NHS standard BMI framework. If you're currently below 55 kg, you may be underweight. Between 74–88 kg, you'd fall into the overweight category. Above 88 kg, the obese classification begins. Remember, this is a general guide — your ideal body weight may vary based on your individual body composition, fitness level, and medical history. Your GP can provide personalised advice about what weight is right for you.
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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 Use BMI to Find Your Healthy Weight
The healthy weight calculator approach works by targeting a BMI between 18.5 and 24.9. For your height of 5'9, this creates the weight range above. To calculate your personal BMI, you need your current weight and height — our free BMI calculator on this page does this instantly and shows you exactly where you fall within the NHS categories.
If you're currently outside the healthy range, even modest weight changes can improve your health. The NHS recommends losing no more than 0.5 to 1 kg per week for sustainable results. Whether you're aiming to reach a healthy weight or maintain it, tracking your progress is helpful — try our free progress tracker to log your journey over time.
- 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.
What's the average UK weight for a 5'9 female?
The average UK adult woman weighs approximately 71.6 kg (11 stone 3 lbs), though this is higher than the healthy weight range. For someone 5'9, the healthy range is 55–74 kg. Average weight varies significantly by age, lifestyle, and body composition, so focus on your personal health rather than comparison.
Is 70 kg a healthy weight for a 5'9 female?
At 5'9 and 70 kg, your BMI would be approximately 23.2, which falls comfortably within the NHS healthy weight range of 18.5–24.9. This is considered a healthy weight. Use our BMI calculator above to confirm your personal BMI and see your exact position within the healthy range.
What weight should I aim for at 5'9?
Your ideal weight depends on your body composition and fitness level, but the NHS healthy weight range is 55–74 kg (8st 9lbs to 11st 9lbs). Many women find the midpoint of around 64–65 kg (10st) a comfortable target. Your GP can advise on a personalised healthy weight for you based on your medical history.
How do I calculate my healthy weight range?
A healthy BMI is 18.5–24.9. For your height, this creates a specific weight range. Our free BMI calculator on this page does the calculation instantly — just enter your height and current weight to see your BMI and healthy weight range in both kg and stone.
Does healthy weight differ for different ethnicities?
The NHS recommends lower BMI thresholds for adults of South Asian, Chinese, Black African, and Black Caribbean heritage because these groups face higher health risks at lower BMI levels. Healthy weight starts at BMI 18.5–22.9 for these populations at 5'9. Discuss your ethnic background with your GP for personalised guidance.
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.