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 Weight Calculator — Find Your Healthy Range
An average weight calculator helps you determine what a healthy weight range is for your height, using NHS BMI guidelines. Your ideal body weight isn't just about numbers — it's about finding a range that supports your health and wellbeing. This guide explains how BMI works, what the healthy weight range is for your height in stone and kilograms, and how to use our free BMI calculator to find your personal healthy weight target.
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.
Understanding Healthy Weight Range by Height and BMI
A healthy weight range is defined by the NHS as a BMI between 18.5 and 24.9. This range is calculated using your weight in kilograms divided by your height in metres squared. For example, an adult who is 173cm (5ft 8in) tall has a healthy weight range of approximately 55.4kg to 74.5kg — or roughly 8st 10lbs to 11st 10lbs in UK measurements.
To find your weight for height UK target, you need to know three things: your height, your target BMI (ideally 18.5–24.9), and your preferred measurement units. The NHS healthy weight framework uses the same BMI categories for all adults, though people of South Asian, Chinese, Black African, and Black Caribbean heritage have lower thresholds because they face higher health risks at lower BMI levels.
- BMI 18.5–24.9 = healthy weight
- BMI 25.0–29.9 = overweight
- BMI 30.0+ = obese
Use our free BMI calculator on this page to instantly discover your personal healthy weight range for your specific height.
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.
Average UK Weight and How It Compares to Healthy Weight
The average UK weight for adults is approximately 85.7kg (13st 7lbs) for men and 71.6kg (11st 3lbs) for women — but this doesn't mean it's a healthy weight. In fact, the average BMI for UK adults is around 27.4, which falls in the overweight category according to NHS guidelines. Your ideal weight calculator should show you your personal healthy range, not just where you compare to average. Even modest weight loss — a reduction of 5–10% of your body weight — can improve blood pressure, blood sugar control, and cholesterol levels, making it worthwhile to work towards your healthy weight range regardless of current average.
Our healthy weight calculator personalises results for your height, age, and sex, giving you a realistic target. Remember that healthy weight also depends on muscle mass, bone density, and individual variation — BMI is a screening tool, not a definitive measure of health.
To calculate your healthy weight range accurately, you'll need your height in centimetres or feet and inches. Use our free weight converter and BMI calculator above to find your results instantly. Enter your height, and the tool will show you the weight range in both kilograms and stone — making it easy to track progress in whichever units you prefer. Once you know your target range, you can set realistic goals and monitor progress using our free progress tracker, which lets you log weight changes over time and visualise your journey towards your healthy weight range.
- 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 difference between average weight and healthy weight?
Average weight is what most people in the UK weigh (around 85.7kg for men, 71.6kg for women), but this often falls in the overweight category. Healthy weight is defined by the NHS as a BMI of 18.5–24.9, which is associated with better health outcomes and lower disease risk. Your healthy weight range is what matters for your personal health, not the average.
How do I calculate my healthy weight range using BMI?
Multiply your height in metres by itself, then multiply your weight in kg by 18.5 and 24.9 (the healthy BMI range). This gives your lower and upper healthy weight limits. Easier: use our free BMI calculator above to find your range instantly in kg and stone.
Is the healthy weight range the same for everyone?
The NHS BMI categories (18.5–24.9 healthy) apply to most adults, but people of South Asian, Chinese, Black African, and Black Caribbean heritage should use lower thresholds (18.5–22.9) because they face higher health risks at lower BMI levels. Always consult your GP for personalised guidance.
What should I do if my current weight is outside the healthy range?
Aim for gradual weight loss of 0.5–1kg per week if you're overweight. Focus on a reduced-calorie diet and increased physical activity. If you need support, talk to your GP about NHS weight management programmes or specialist services. Track your progress using our free progress tracker.
Does my healthy weight depend on anything other than BMI?
Yes. BMI doesn't account for muscle mass, bone density, or where fat is stored. Consider your waist circumference (NHS thresholds: men over 94cm, women over 80cm = increased risk). Your GP can assess your individual health and recommend a personalised weight target based on your overall health profile.
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.