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
Average Female Weight in the UK
The average weight for UK adult women is approximately 71.6 kg (11 stone 3 lbs), according to the latest Office for National Statistics (ONS) data. However, average weight doesn't mean healthy weight — and individual health depends on many factors including height, age, muscle mass, and overall fitness. This UK health guide explains what the statistics show, how your weight compares to NHS guidance, and practical tools to assess your personal health status.
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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.
UK Female Weight Statistics and NHS Context
Current UK statistics: The average weight for UK adult women is approximately 71.6 kg (11 stone 3 lbs) with an average height of approximately 161.6 cm (5 ft 3.5 in). This equates to an average BMI of around 27.4, which falls in the overweight category according to NHS guidelines.
However, this average does not reflect healthy weight recommendations. The NHS defines a healthy weight range using BMI: between 18.5 and 24.9 for most adults. For an average-height UK woman (161.6 cm), a healthy weight range is approximately 48.5 to 64.8 kg (7 stone 8 lbs to 10 stone 3 lbs).
Important context: If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher health risks at lower weights. Average weight varies significantly by region, age group, and lifestyle factors — it is not a target or standard you need to meet.
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.
Understanding Your Personal Healthy Weight
Your healthy weight depends on your individual height, age, and body composition — not the population average. Use our free BMI calculator to check your personal BMI instantly and see where you sit against NHS guidance. Remember that BMI is a useful screening tool but has limitations: it doesn't account for muscle mass, bone density, or where fat is stored. A GP or healthcare professional can give you personalised advice about what a healthy weight means for your individual health and circumstances.
You can also convert your weight between kg, stone, and pounds using our free weight converter to help track progress or understand measurements in the units you prefer.
- 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 average weight for a UK woman?
The average weight for UK adult women is approximately 71.6 kg (11 stone 3 lbs), with an average height of 161.6 cm (5 ft 3.5 in). However, average weight is not the same as healthy weight — the NHS recommends a BMI between 18.5 and 24.9 for most adults, regardless of population averages.
What weight is healthy for a woman of average height?
For a woman of average UK height (161.6 cm), a healthy weight range is approximately 48.5 to 64.8 kg (7 stone 8 lbs to 10 stone 3 lbs), based on NHS BMI guidelines. This range assumes standard body composition; individual needs vary based on muscle mass and age.
How does my weight compare to NHS guidance?
The best way to check your personal health status is using our free BMI calculator, which compares your weight and height to NHS BMI categories. Your GP can also provide personalised advice about healthy weight for you based on your individual health profile.
Is the average UK female weight healthy?
At 71.6 kg, the average UK woman's weight translates to a BMI of approximately 27.4, which falls in the overweight category according to NHS guidelines. This reflects wider population trends but doesn't mean it's healthy for individuals — healthy weight is personal and depends on your height, age, and health.
Can I use average weight to set my own weight target?
No — average weight should not be your personal target. Instead, use NHS BMI guidance or speak with your GP to determine a healthy weight range for your individual circumstances. Our BMI calculator and weight converter are free tools that can help you understand your personal health status.
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.