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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Ideal Weight Graph for UK Adults
An ideal weight graph shows the healthy weight range for adults at different heights, based on NHS BMI guidelines. Your ideal body weight depends on your height, age, muscle mass, and individual health factors — not a single fixed number. This guide presents UK-specific data on healthy weight ranges, average weights, and the factors that influence what's genuinely ideal for you personally. Use our free BMI calculator to find where your current weight falls within the healthy range for your height.
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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.
Healthy Weight Ranges by Height (UK Data)
According to NHS guidelines, a healthy weight range for adults falls within a BMI of 18.5 to 24.9. Using this standard, here are approximate healthy weight ranges for common UK heights:
- 5ft 2in (157cm): 47–62 kg (7st 6lbs – 9st 10lbs)
- 5ft 4in (163cm): 52–68 kg (8st 3lbs – 10st 9lbs)
- 5ft 6in (168cm): 56–74 kg (8st 12lbs – 11st 8lbs)
- 5ft 8in (173cm): 55–75 kg (8st 10lbs – 11st 11lbs)
- 5ft 10in (178cm): 59–79 kg (9st 4lbs – 12st 6lbs)
- 6ft 0in (183cm): 64–85 kg (10st 1lbs – 13st 5lbs)
Use our free weight converter above to switch between kg, stone, and pounds for your height. These ranges are based on standard BMI calculations and represent typical healthy weights for UK adults.
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.
Factors That Affect Your Ideal Weight
Your ideal weight is not one-size-fits-all. Muscle mass is heavier than fat, so muscular individuals may have a higher ideal weight within the healthy BMI range. Frame size (small, medium, large bone structure) affects ideal weight — a larger frame naturally carries more weight healthily. Age influences ideal weight; older adults may retain muscle differently. Ethnicity matters: the NHS recommends lower BMI thresholds for South Asian, Chinese, Black African, and Black Caribbean adults due to higher health risks at lower BMI levels. Medical history and individual health conditions also shape what's ideal for you. Calculate your personal healthy weight range using our BMI calculator for context specific to your height and circumstances.
- 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 UK adults?
According to ONS data, the average UK adult man weighs approximately 85.7 kg (13st 7lbs) at 175.3 cm (5ft 9in) height, with an average BMI of 27.9. The average UK adult woman weighs approximately 71.6 kg (11st 3lbs) at 161.6 cm (5ft 3.5in) height, with an average BMI of 27.4. These are population averages, not ideals — many UK adults fall outside the healthy BMI range.
How do I calculate my ideal weight for my height?
Calculate your healthy weight range using the formula: 18.5 × height(m)² to 24.9 × height(m)². For example, at 5ft 8in (1.73m), the healthy range is 55–74 kg (8st 10lbs–11st 8lbs). Use our free BMI calculator above to instantly find your personal healthy weight range based on your exact height and get context for where your current weight falls.
Is there one "ideal" weight for everyone at the same height?
No. Ideal weight varies significantly based on muscle mass, bone structure, age, ethnicity, and individual health factors. Two people at 5ft 10in might have ideal weights anywhere within the 59–79 kg range depending on their build and fitness level. Your GP can advise what's ideal for your circumstances rather than aiming for a specific number.
Do ethnic groups have different healthy weight ranges?
Yes. The NHS recommends lower BMI thresholds for South Asian, Chinese, Black African, and Black Caribbean adults because these groups face higher risk of type 2 diabetes and cardiovascular disease at lower BMI levels. For these groups, a healthy BMI is 18.5–22.9 rather than the standard 18.5–24.9. Discuss your ethnicity-specific healthy weight range with your GP.
How does muscle mass affect ideal weight on an ideal weight graph?
Muscle is denser than fat, so individuals with high muscle mass (such as athletes or very active people) may weigh more while still being at a healthy body composition. A standard ideal weight graph uses BMI, which doesn't distinguish muscle from fat. If you're muscular and your BMI suggests overweight, your actual body fat percentage may still be healthy — discuss with your GP rather than relying solely on the graph.
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.