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 is the Average Weight of Women in the UK?
The average UK woman weighs approximately 71.6 kg (11 stone 3 lbs), though weight varies significantly based on height, age, genetics, and individual health factors. Understanding your own healthy weight range — rather than comparing to averages — is what matters most for your health. Using our free BMI calculator and weight converter, you can find what a healthy weight means for your specific height and circumstances. This guide explains UK weight statistics, healthy weight ranges, and practical tools to support your health journey.
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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.
Average Weight and UK Statistics
According to Office for National Statistics (ONS) data:
- Average UK woman weight: 71.6 kg (11 stone 3 lbs)
- Average UK woman height: 161.6 cm (5 ft 3.5 in)
- Average UK woman BMI: approximately 27.4
However, these are population averages and do not reflect individual variation. Weight is influenced by genetics, age, muscle mass, medical conditions, medications, and lifestyle factors. A woman aged 20 may have a very different healthy weight range than a woman aged 60, even at the same height. The NHS recommends focusing on your own healthy weight range for your height rather than targeting an average figure. Use the weight converter on this page to see equivalent measurements in stone and lbs, and our BMI calculator to determine your personal healthy weight band according to NHS guidance.
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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.
Healthy Weight Ranges for UK Women
According to NHS guidelines, a healthy BMI for most UK women is 18.5 to 24.9. This translates to different weights depending on your height. For example, a woman who is 5 ft 5 in (165 cm) tall has a healthy weight range of approximately 50–65 kg (7 stone 10 lbs to 10 stone 3 lbs). Women of South Asian, Chinese, Black African, or Black Caribbean heritage may have slightly lower healthy BMI thresholds (18.5 to 22.9), as these groups face higher health risks at lower weight levels. Our free BMI calculator shows your personal BMI category and healthy weight range instantly. Remember: healthy weight is not one single number — it is a range that accounts for your individual frame size and muscle mass.
- 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 considered a healthy weight for a woman in the UK?
A healthy weight depends on your height, age, and genetics. The NHS recommends a BMI between 18.5 and 24.9 for most adults. Use the BMI calculator on this page to find your healthy range. For women of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a slightly lower threshold (18.5 to 22.9) due to higher health risks at lower BMI levels.
How do I know if my weight is healthy?
Your GP can assess whether your weight is healthy by considering your BMI, waist circumference, overall health, and any weight-related conditions like high blood pressure or type 2 diabetes. Our free BMI calculator and weight converter can help you understand your starting point. If you have health concerns, discuss them with your GP, who can give you personalised advice.
Why do women weigh more on average than in the past?
Average UK weight has increased over several decades due to changes in activity levels, food availability, portion sizes, and environmental factors. This reflects population-wide trends rather than individual health status. Many factors beyond individual control — like access to healthcare, socioeconomic factors, and medication side effects — also influence weight.
Is the average weight the same target weight for all women?
No. Average weight statistics are population-level data and do not apply to individuals. Your healthy weight depends on your unique height, age, muscle mass, frame size, and health conditions. Two women of the same height may have different healthy weight ranges. Always refer to your personal BMI range and speak with your GP about what healthy weight means for you.
Can weight management tools help me understand my weight?
Yes. The BMI calculator, weight converter, and progress tracker on this page can help you understand your weight in different units, calculate your BMI according to NHS guidelines, and track changes over time. These tools are informational and complement, not replace, advice from your GP.
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.