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
How Much Does the Average Woman Weigh in the UK?
The average UK woman weighs approximately 71.6 kg (11 stone 3 lbs), according to the latest NHS data. However, "average" and "healthy" are not the same thing. Your ideal weight depends primarily on your height, and the NHS defines healthy weight as a BMI between 18.5 and 24.9. Rather than focusing on a single number, it's more useful to understand what a healthy weight range is for your height. This guide explains how much should i weigh uk based on evidence-based health guidelines, and helps you find your personal healthy weight for your height using our free BMI calculator above.
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.
Healthy Weight Ranges for Women by Height
Rather than a single "ideal weight", the NHS provides healthy weight ranges based on height. These are calculated using BMI thresholds of 18.5 to 24.9, which apply to most UK adults. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, slightly lower thresholds (18.5–22.9) apply due to higher cardiovascular risk at the same BMI.
Here are healthy weight ranges for women at common UK heights:
- 5ft 0in (152cm): 45–61 kg (7st 0–9st 9 lbs)
- 5ft 2in (157cm): 48–65 kg (7st 7–10st 3 lbs)
- 5ft 4in (163cm): 52–70 kg (8st 2–11st 0 lbs)
- 5ft 6in (168cm): 55–75 kg (8st 9–11st 11 lbs)
- 5ft 8in (173cm): 59–80 kg (9st 4–12st 8 lbs)
- 5ft 10in (178cm): 63–85 kg (9st 13–13st 5 lbs)
Use our free weight converter above to check your weight in different units, or calculate your personal BMI healthy range using the BMI calculator on this page.
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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 Weight
Your ideal weight depends on more than just height. Muscle mass significantly affects total weight—athletes and people with high muscle mass may have a higher weight while maintaining low body fat. Frame size (whether you naturally have a larger or smaller bone structure) also matters. Age influences healthy weight, as muscle naturally decreases with age. Additionally, genetics plays a substantial role in where your body stores fat and your natural weight set point.
Rather than chasing a specific number, focus on how you feel, your energy levels, and whether your weight supports good health. Your GP can help you determine what a healthy weight range means for your individual circumstances, considering your medical history and lifestyle.
- 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 difference between average weight and healthy weight?
Average weight is what most women actually weigh (around 71.6 kg in the UK). Healthy weight is a range determined by your height and BMI. The average may not be healthy—in fact, around 63% of UK adults are overweight or obese. Your healthy weight depends on your individual height and health status, not on what others weigh.
How do I calculate my healthy weight range for my height?
Use the free BMI calculator on this page—it instantly shows your healthy weight range in both kg and stone. Alternatively, multiply your height in metres by itself, then multiply by 18.5 for the lower bound and 24.9 for the upper bound. Your GP can also help you determine a healthy target weight.
Does muscle weigh more than fat?
Yes. Muscle tissue is denser than fat, so a muscular person may weigh more than someone with higher body fat at the same height—and still be perfectly healthy. This is why BMI alone doesn't tell the whole story. Body composition (muscle vs fat ratio) matters more than the number on the scales.
Should I aim for the average weight or my healthy weight range?
Always aim for your healthy weight range based on your height and BMI, not the average. The average UK woman weighs 71.6 kg, but this falls into the overweight or obese category for many heights. Your GP can advise what's healthiest for you personally.
Do weight recommendations differ by ethnicity in the UK?
Yes. The NHS recommends lower BMI thresholds (18.5–22.9 instead of 18.5–24.9) for people of South Asian, Chinese, Black African, and Black Caribbean heritage, as these groups have higher cardiovascular and diabetes risk at lower BMI levels. Discuss this with your GP if it applies to you.
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.