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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Height Weight Age Tables — UK Health Reference
Height weight age tables help you understand what constitutes a healthy weight across different ages and heights in the UK population. While there is no single "ideal" weight for a given height and age, the NHS uses BMI (body mass index) as the primary screening tool to assess whether your weight falls within a healthy range. This guide covers UK health standards, healthy weight ranges, and how to use these references alongside professional health advice from your GP.
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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.
NHS Healthy Weight Ranges by Height and Age
The NHS does not publish age-specific weight tables, as weight recommendations are based primarily on BMI rather than age alone. However, age is important because body composition changes throughout life—muscle naturally decreases with age, which affects overall health assessments. The NHS recommends a healthy BMI of 18.5 to 24.9 for all adults regardless of age, though your GP may take age-related factors into account during consultations.
- Adults aged 18–65: Standard NHS BMI categories apply (18.5–24.9 is healthy weight)
- Adults aged 65+: Some research suggests slightly higher BMI may be protective, but NHS guidance remains consistent
- Ethnicity matters: For South Asian, Chinese, Black African, and Black Caribbean adults, lower BMI thresholds apply (18.5–22.9 is healthy)
To find your healthy weight range for your height, use our free BMI calculator above to identify where you fall, then consult your GP if you have concerns about your weight management or health.
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 by Height, Sex, and Age
UK population data shows average weights vary significantly by height and sex. For example, the average UK adult man (5ft 9in / 175cm) weighs approximately 85.7kg (13st 7lbs), while the average woman (5ft 3.5in / 161.6cm) weighs approximately 71.6kg (11st 3lbs). However, "average" does not mean "healthy"—approximately 63% of UK adults are overweight or obese. Rather than comparing yourself to population averages, use our weight converter to check your current weight in stone, pounds, or kilograms, then calculate your personal BMI with our free tool to see where you stand against NHS healthy weight guidance.
- 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 healthy weight for my height and age?
The NHS does not provide age-specific weight tables. Instead, use BMI as your guide—a healthy BMI is 18.5–24.9 for all adults. Use our free BMI calculator to find your healthy weight range for your height instantly. Your GP can provide personalised advice based on your age, health conditions, and individual circumstances.
How does age affect healthy weight?
Age affects body composition—muscle naturally decreases and fat may increase with age, which can shift BMI interpretation. However, NHS guidelines recommend the same BMI targets for all adults (18.5–24.9). Older adults may have slightly different health contexts, which is why speaking with your GP about your individual situation is important.
Are there different healthy weight ranges for men and women?
No. BMI calculations and healthy weight ranges (18.5–24.9) are the same for men and women of the same height and weight. However, body composition differs—men typically have more muscle and less fat at the same BMI than women. Waist circumference is also assessed: men over 94cm (37in) or women over 80cm (31.5in) face increased health risk.
What if I don't know my height in centimetres?
Use our weight converter to switch between metric and imperial measurements. If you know your height in feet and inches, the converter will give you the centimetre equivalent. Then use our BMI calculator with both measurements to find your healthy weight range in stone, pounds, or kilograms.
Should I aim for the exact "average" weight for my height?
No. Population averages are descriptive, not prescriptive. What matters is that your weight falls within the healthy BMI range for your height (18.5–24.9 BMI). Some healthy people weigh more, others less, depending on muscle mass and frame size. Focus on your BMI, not population averages, and talk to your GP about weight management if you have health concerns.
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.