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
Healthy Weight Chart For Height, Weight And Age
A healthy weight depends on your height, age, and individual health factors rather than age alone. In the UK, the NHS uses BMI (body mass index) as the primary screening tool to determine if weight falls within a healthy range for your height. This guide explains how to use height and weight charts effectively, what healthy weight ranges mean for UK adults, and how to use our free weight management tools to track your own health context. Age plays a secondary role—your GP will consider overall health rather than applying age-specific weight targets.
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.
How Height And Weight Charts Work In The UK
Height and weight charts show the relationship between your height and a healthy weight range, calculated using BMI. In the UK, the NHS defines healthy weight as a BMI of 18.5 to 24.9 for most adults. To use a chart, find your height on the vertical axis and your weight on the horizontal axis—where they meet shows your BMI category.
- Healthy weight range: BMI 18.5–24.9 (varies by height)
- Overweight range: BMI 25.0–29.9
- Obese range: BMI 30.0 and above
- Ethnicity adjustments: South Asian, Chinese, Black African and Caribbean adults have lower recommended thresholds (BMI 18.5–22.9 for healthy weight)
Use our free BMI calculator above to find your personal BMI instantly based on your height and current weight. This is faster and more accurate than a UK pharmacy charts.
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.
Why Age Doesn't Determine Healthy Weight
A common misconception is that healthy weight increases with age. The NHS BMI categories remain the same across all adult ages—a 30-year-old and a 70-year-old with the same height should aim for the same BMI range. However, your GP may consider age-related factors such as muscle loss, bone density changes, and existing health conditions when assessing your overall health.
Weight management becomes more important with age due to increased risk of type 2 diabetes, cardiovascular disease, and mobility problems. If you're concerned about your weight in relation to your age or health, your GP can provide personalised guidance. Our free weight converter helps you track weight changes over time across kg, stone, and pounds.
- 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 healthy weight range for someone who is 5ft 8in tall?
For 5ft 8in (173cm), a healthy BMI of 18.5–24.9 equals approximately 55–74 kg (8st 10lbs to 11st 9lbs). Use our free BMI calculator above to check your exact range based on your height and see where your current weight sits.
Do I need different weight targets as I get older?
No—NHS BMI categories stay the same across all adult ages. However, your GP may adjust guidance based on age-related health factors like muscle loss or existing conditions. Individual health assessment matters more than age-based charts.
Are height and weight charts accurate for muscular people?
No—BMI doesn't distinguish between muscle and fat. Athletes or very muscular individuals may have a "high" BMI despite low body fat. Your GP can assess whether your weight is healthy using additional measures like waist circumference.
How do I use a height and weight chart?
Find your height on the vertical axis and weight on the horizontal axis. Where they intersect shows your BMI category (healthy, overweight, or obese). Our free weight converter and BMI calculator do this instantly—just enter your measurements.
Should I aim for a specific weight based on my height and age?
Aim for the healthy BMI range for your height (18.5–24.9), not a fixed weight number. Age doesn't change this—your GP can advise on realistic targets based on your personal health context, medications, and lifestyle.
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.