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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Average Weight for a 5'5" Female in the UK
The average weight for a 5'5" (165 cm) female in the UK is approximately 70–72 kg (11 stone 0 lbs to 11 stone 4 lbs). However, "average" doesn't mean "ideal"—what matters for your health is where your weight falls within the healthy weight range for your height. According to NHS guidelines, a healthy weight for a 5'5" woman is between 50–67 kg (7 stone 12 lbs to 10 stone 8 lbs). Your individual ideal weight depends on your muscle mass, frame size, and overall health rather than a single target number.
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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
According to NHS guidelines, the healthy weight range for a 5'5" (165 cm) female is 50–67 kg (7 stone 12 lbs to 10 stone 8 lbs). This range is based on a BMI of 18.5 to 24.9, which the NHS recognises as the ideal target for most adults.
If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a slightly lower healthy weight range of 48–62 kg (7 stone 7 lbs to 9 stone 11 lbs), as research shows these groups face higher health risks at the same BMI level.
- Lower healthy limit: 50 kg (7 stone 12 lbs) — BMI 18.5
- Upper healthy limit: 67 kg (10 stone 8 lbs) — BMI 24.9
- Overweight threshold: 68 kg (10 stone 10 lbs) — BMI 25.0
- Obese threshold: 81 kg (12 stone 11 lbs) — BMI 30.0
Use our free BMI calculator above to check where your current weight sits and calculate your personal healthy weight range instantly.
Clinically BackedWeight Loss
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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
Your ideal weight isn't a single number—it depends on several individual factors. Muscle mass is the biggest factor: someone with high muscle mass may weigh more than the BMI range suggests but still be very healthy, since muscle is denser than fat. Frame size also matters; a woman with a larger frame may naturally sit at the upper end of the healthy range, while a smaller-framed woman may sit comfortably at the lower end.
Age affects metabolism and muscle retention. Ethnicity influences health risk at different weights. Genetics plays a significant role in your natural weight set point. Rather than chasing a single "ideal" number, focus on feeling energetic, maintaining healthy lifestyle habits, and checking that your BMI and waist circumference align with NHS recommendations. Your GP can provide personalised guidance.
- 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 difference between average weight and ideal weight?
Average weight is what most people at a given height weigh—around 70–72 kg for a 5'5" female in the UK. Ideal weight is the healthy range for good health outcomes, which is 50–67 kg (BMI 18.5–24.9). Average doesn't equal healthy; many UK adults sit above the healthy weight range.
Is 70 kg overweight for a 5'5" female?
At 70 kg, a 5'5" female has a BMI of approximately 25.8, which falls into the overweight category according to NHS guidelines. The healthy weight upper limit is 67 kg. However, if you have significant muscle mass, your individual circumstances may differ—speak with your GP for personalised advice.
How do I calculate my healthy weight range?
Use our free BMI calculator above to find your personal healthy weight range in seconds. Alternatively, multiply 18.5 by your height in metres squared (for the lower limit) and 24.9 by the same figure (for the upper limit). For a 5'5" woman, this gives 50–67 kg. Our weight converter can help you switch between kg, stone, and pounds.
Does muscle mass affect what I should weigh?
Yes, significantly. Muscle is denser than fat, so two people at the same height and weight can have very different body compositions. BMI doesn't distinguish between muscle and fat. If you're strength training, you may weigh more than the BMI range suggests but still be healthy. Waist circumference is a useful additional measure—the NHS recommends under 80 cm (31.5 inches) for women.
What if I'm of South Asian or Black Caribbean heritage—are the weight ranges different?
Yes. The NHS recommends lower healthy weight thresholds for people of South Asian, Chinese, Black African, and Black Caribbean heritage because they face higher health risks at the same BMI. For a 5'5" female from these backgrounds, aim for 48–62 kg (BMI 18.5–22.9) rather than the standard 50–67 kg range.
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.