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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Average Weight For Women In Kg — What's Healthy?
The average weight for UK women is approximately 71.6 kg (11 stone 3 lbs), according to recent data. However, "average" is very different from "healthy" — and healthy weight varies significantly by height, age, and individual health factors. Using NHS BMI guidelines, a healthy weight for women typically falls between a BMI of 18.5 and 24.9. This guide explains what healthy weight ranges mean, how to calculate your ideal body weight, and how BMI provides a useful framework for understanding weight and health.
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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 For Women By Height
A healthy weight range depends entirely on your height. The NHS uses BMI (Body Mass Index) to define healthy weight — a BMI of 18.5 to 24.9 is considered healthy for most adults. For women of average height (around 162 cm or 5ft 4in), the healthy weight range is approximately 48–65 kg (7st 8lbs to 10st 3lbs). For women of 170 cm (5ft 7in), the healthy weight range is approximately 53–72 kg (8st 4lbs to 11st 5lbs). You can calculate your own weight for height using the free BMI calculator on this page — simply enter your height and current weight to see where you fall on the NHS scale. If your BMI is below 18.5, you're classified as underweight; 25–29.9 is overweight; and 30 or above is obese. These categories apply to most adults, though South Asian, Chinese, Black African, and Black Caribbean women may have different thresholds due to higher health risks at lower BMI levels.
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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.
Using BMI To Find Your Ideal Weight
Rather than targeting a specific weight, the NHS recommends using BMI as a guide to determine a healthy weight range for your height. To calculate your ideal weight range: multiply your height in metres by itself, then multiply by 18.5 (lower bound) and 24.9 (upper bound). For example, at 165 cm (1.65 m), your healthy weight range is roughly 50–68 kg (7st 12lbs to 10st 10lbs). Remember that BMI doesn't distinguish between muscle and fat — athletes or very muscular individuals may have a higher BMI but lower body fat. Additionally, where you carry weight matters; excess weight around the waist poses greater health risks than weight distributed elsewhere. Use the healthy weight calculator on this page to get your personalised range instantly, and consider discussing your individual health goals with your GP for tailored advice.
- 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 women in the UK?
According to recent data, the average weight for UK women is approximately 71.6 kg (11 stone 3 lbs). However, this is a population average and does not indicate what is healthy for any individual woman. Healthy weight varies significantly based on height, age, muscle mass, and medical history. Your GP can advise on what's appropriate for you.
What weight range is healthy for a woman of 165 cm?
For a woman of 165 cm (5ft 5in), the NHS healthy weight range is approximately 50–68 kg (7st 12lbs to 10st 10lbs), based on a BMI of 18.5–24.9. This assumes average body composition. Use the free BMI calculator on this page to check your personal healthy range based on your exact height.
How do I calculate my ideal body weight?
The simplest method is using BMI: multiply your height in metres by itself, then by 18.5 and 24.9 to get the lower and upper bounds of a healthy weight range. For example, at 1.70 m: 1.70 × 1.70 = 2.89; 2.89 × 18.5 = 53.5 kg (lower); 2.89 × 24.9 = 72 kg (upper). Our free BMI calculator does this instantly.
Does BMI work the same for all women?
BMI works well for most women but has limitations. It doesn't account for muscle mass, bone density, or where fat is stored. Additionally, the NHS recommends lower BMI thresholds for women of South Asian, Chinese, Black African, or Black Caribbean heritage, as these groups face higher health risks at lower BMI levels. Your GP can advise on your individual context.
Is reaching "average" weight the same as being healthy?
No. Average weight is simply the mean across a population — it says nothing about health. A woman may be at average weight but have an unhealthy BMI, or above average weight with a healthy BMI if she has significant muscle mass. Health is individual. Focus on your BMI range and how you feel, not on matching an average figure.
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.