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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Healthy Weight Range for 5'5" Women in the UK
For a woman who is 5'5" (165 cm), the healthy weight range according to NHS guidelines is approximately 52–70 kg, or 8 stone 2 pounds to 11 stone. This range corresponds to a BMI of 18.5 to 24.9, which represents a healthy weight for your height. However, ideal body weight varies based on individual factors including muscle mass, frame size, and overall fitness level. Use our free BMI calculator to check where your personal weight sits within this range and understand what it means for your health.
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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 and Average UK Data for 5'5" Women
The healthy weight range for a 5'5" (165 cm) woman is 52–70 kg (8st 2lbs–11st 0lbs). This range assumes a BMI between 18.5 and 24.9, the NHS standard for healthy adults. The average UK woman is approximately 161.6 cm (5ft 3in) and weighs around 71.6 kg (11st 3lbs), meaning many women at 5'5" are naturally taller than the UK average and may carry weight differently.
Within your height range, you can use the healthy weight calculator approach: lower bound = 18.5 × (1.65)² = 50.3 kg; upper bound = 24.9 × (1.65)² = 67.6 kg. Most guidelines suggest the practical healthy range is 50–70 kg for your height. Use our free weight converter to switch between kg, stone, and pounds instantly for easy reference.
- Lower healthy weight: approximately 50 kg (7st 12lbs)
- Upper healthy weight: approximately 70 kg (11st 0lbs)
- Midpoint: approximately 60 kg (9st 6lbs)
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 Body Weight
Your ideal body weight is not fixed — it varies based on several personal factors beyond just height. Muscle mass is the most significant factor: muscle weighs more than fat, so an athletic woman at 5'5" may weigh 70 kg but have a low body fat percentage and excellent health markers. Frame size (small, medium, or large bone structure) affects weight naturally; larger frames typically carry more weight healthily.
Age influences ideal weight as metabolism changes and muscle mass naturally decreases with age. Ethnicity also matters: NHS guidance recommends lower weight thresholds for South Asian, Chinese, Black African, and Black Caribbean women due to higher health risks at lower BMI levels. Your GP can help assess whether your personal weight is healthy for your individual circumstances, regardless of where you fall within the general range for 5'5".
- 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 is the exact healthy weight range for a 5'5" woman?
According to NHS guidelines, a 5'5" woman (165 cm) with a healthy BMI of 18.5–24.9 should weigh between approximately 50–70 kg (7st 12lbs–11st 0lbs). The most commonly cited range is 52–70 kg. Individual ideal weight varies based on muscle mass, frame size, and fitness level.
Is the average UK weight healthy for a 5'5" woman?
The average UK woman weighs 71.6 kg, but the average UK adult BMI is 27.4 (overweight category). Being average does not mean being in a healthy range. For 5'5", a weight above 70 kg typically falls into the overweight category unless you have significant muscle mass.
How do I calculate my ideal weight for 5'5"?
Use the BMI formula: healthy weight = BMI × height(m)². For 5'5" (1.65m), a healthy BMI of 18.5 gives 50.3 kg, and 24.9 gives 67.6 kg. A practical healthy range is 50–70 kg. Use our free BMI calculator to check your personal BMI instantly.
Does muscle mass change the healthy weight range for my height?
Yes. Muscle weighs more than fat, so an athletic woman at 5'5" may weigh 70+ kg but have low body fat and be very healthy. BMI alone doesn't distinguish muscle from fat. Waist measurement and overall fitness are also important indicators of health beyond just weight.
Are healthy weight ranges different for different ethnicities at 5'5"?
Yes, according to NHS guidance. Women of South Asian, Chinese, Black African, or Black Caribbean heritage may have higher health risks at the same BMI, so lower weight targets may be recommended by your GP. Discuss your personal healthy weight with your healthcare provider.
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.