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
Healthy Weight for a 5ft 5in Woman in the UK
At 5ft 5in (165cm), a healthy weight range for an adult woman in the UK is between approximately 50kg and 67kg (7st 12lbs to 10st 7lbs), according to NHS guidelines. Your ideal weight depends on your frame size, muscle mass, and overall health — not just a single number. Use our free BMI calculator above to check where your current weight sits, and discover what the healthy range means for your individual health profile.
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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.
NHS Weight Guidance for Your Height
The healthy BMI range is 18.5 to 24.9 for most adults, and at 5ft 5in (165cm), this translates to a weight range of roughly 50kg to 67kg. However, if you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends slightly lower thresholds — a healthy BMI starts at 18.5 but tops out at 22.9, giving a range of approximately 50kg to 61kg for your height. A BMI of 25–29.9 is classified as overweight, and 30 or above is classed as obese according to NHS categories. Remember that BMI doesn't account for muscle mass or where fat is stored — it's a screening tool, not a complete picture of health. Your waist circumference also matters: the NHS recommends women keep their waist below 80cm (31.5 inches) for metabolic health, with increased risk above 88cm (34.5 inches).
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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 Weight Converter and Finding Your Ideal Range
Converting your weight between kilograms, stone, and pounds can help you understand where you sit on health charts. Our free weight converter allows you to switch between metric and imperial measurements instantly. If you weigh 60kg at 5ft 5in, that's 9st 6lbs and gives a BMI of approximately 22.3 — within the healthy range. Remember that factors like your age, fitness level, and medical history all influence what's truly healthy for you personally. Your GP can offer tailored advice about your ideal weight and whether any weight management support would benefit your health, rather than relying on numbers alone.
- 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 ideal weight for a 5ft 5in woman according to NHS guidelines?
At 5ft 5in (165cm), a healthy weight range is approximately 50kg to 67kg (7st 12lbs to 10st 7lbs) for most adults, based on a BMI of 18.5–24.9. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, the range is lower: roughly 50kg to 61kg. However, ideal weight varies based on frame size, muscle mass, and individual health. Your GP can advise what's right for you.
What's considered overweight or obese at 5ft 5in?
At your height, a BMI of 25–29.9 (approximately 67kg to 80kg or 10st 7lbs to 12st 8lbs) is classified as overweight, and 30 or above (over 80kg or 12st 8lbs) is obese according to NHS categories. However, BMI is a screening tool only — muscle, bone density, and fat distribution also matter. Always discuss your personal situation with your GP.
How do I calculate my BMI for my height?
Use our free BMI calculator above — simply enter your weight and height, and it will instantly show your BMI and how it compares to NHS healthy ranges. Alternatively, the formula is: weight (kg) ÷ height (m)². For example, at 5ft 5in (1.65m), a weight of 60kg gives a BMI of 22, which is in the healthy range.
Does waist measurement matter as much as weight?
Yes — waist circumference is an important health indicator alongside weight and BMI. The NHS recommends women keep their waist below 80cm (31.5 inches) for better metabolic health. Excess fat stored around the abdomen carries higher health risks than fat stored elsewhere. Measuring your waist regularly is a valuable part of weight management alongside using our progress tracker.
Should I aim for a specific weight, or is a range better?
A healthy weight range is better than targeting a single number, because weight varies based on muscle, water, hormones, and time of day. At 5ft 5in, focus on staying within the 50–67kg range and maintaining a healthy lifestyle with balanced nutrition and physical activity. Your GP can help you set realistic, personalized goals rather than chasing arbitrary figures on the scales.
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.