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's the Average Body Weight For Female in the UK?
The average body weight for a UK female adult is approximately 71.6 kg (11 stone 3 lbs), according to the most recent Office for National Statistics data. However, average weight and healthy weight are different things. Your individual healthy weight depends on your height, age, and overall health — not just how you compare to national averages. Use our free BMI calculator to find your personal healthy weight range based on NHS guidance, and our weight converter to switch between kg, stone, and lbs instantly.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 Female Weight by Age and Height
Current UK statistics: The average weight for UK women is 71.6 kg (11 stone 3 lbs) with an average height of 161.6 cm (5 feet 3.5 inches). However, this average masks significant variation — women at different heights have very different healthy weight ranges. For example, a woman who is 160 cm tall has a healthy weight range of approximately 47–64 kg (7 stone 4 lbs to 10 stone 1 lb), while a woman at 175 cm has a healthy weight range of 55–76 kg (8 stone 9 lbs to 12 stone 0 lbs). Average does not mean healthy — your GP or our BMI calculator can help you determine what's healthy for your individual height and build.
- Age 20–39: Average approximately 70–74 kg
- Age 40–59: Average approximately 72–76 kg
- Age 60+: Average approximately 71–75 kg
Weight tends to increase gradually with age due to reduced physical activity and changes in metabolism, though this is not inevitable and can be managed through lifestyle.
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.
Healthy Weight vs Average Weight — NHS Guidance
Your healthy weight range is determined by your BMI (body mass index), not by national averages. According to NHS guidelines, a healthy BMI is between 18.5 and 24.9. For women of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends a lower healthy BMI range of 18.5 to 22.9 due to higher health risks at higher BMI levels. Our weight management guide and BMI calculator can show you your personal healthy weight range. Even if you're close to the national average, you might be outside the healthy range for your height — or perfectly healthy at a different weight than the average. Focus on your individual health markers: blood pressure, fitness, energy levels, and how you feel, not just numbers on a scale.
- 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.
Is 71.6 kg (11 stone 3 lbs) a healthy weight?
Not necessarily. Healthy weight depends entirely on your height. At 161.6 cm (the average UK female height), 71.6 kg gives a BMI of approximately 27.4, which falls in the overweight category. However, at 175 cm, the same weight would give a BMI of 23.3 (healthy). Use our free BMI calculator to check your personal healthy weight range.
What's the healthy weight range for an average-height UK woman?
For a woman at 161.6 cm (5 feet 3.5 inches), the healthy weight range is approximately 48–65 kg (7 stone 8 lbs to 10 stone 3 lbs) according to NHS BMI guidelines. This is lower than the current national average of 71.6 kg, reflecting the fact that the average UK female weight has increased over recent decades.
Why is average weight higher than healthy weight for many women?
The average UK female weight has increased significantly over the past 30 years due to changes in diet, activity levels, and lifestyle. This reflects population trends rather than health recommendations. The NHS healthy weight range (BMI 18.5–24.9) remains unchanged because it's based on health outcomes, not current averages.
How can I find my personal healthy weight?
Your healthy weight range depends on your height and, for some ethnic groups, adjusted BMI thresholds. Use our free BMI calculator above to enter your height and instantly see your healthy weight range. You can also speak to your GP, who can provide personalised guidance based on your individual health.
Does healthy weight differ for women of different ethnic backgrounds?
Yes. The NHS recommends lower BMI thresholds (18.5–22.9 instead of 18.5–24.9) for women of South Asian, Chinese, Black African, or Black Caribbean heritage because these groups face higher cardiovascular and metabolic health risks at the same BMI. Use our BMI calculator, which includes these adjusted thresholds.
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.