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
What Is a Healthy Weight in Wales?
A healthy weight in Wales follows the same NHS BMI guidelines as the rest of the UK. For most adults, a healthy weight range corresponds to a BMI of 18.5 to 24.9, though the specific weight depends on your height. If you're looking to understand what constitutes an ideal body weight for you, your BMI provides a reliable starting point. Use our free BMI calculator above to find your personal healthy weight range in kg and stone instantly, and discover where you sit within NHS health thresholds.
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 and BMI in Wales
In Wales, the NHS recommends a healthy BMI range of 18.5 to 24.9 for most adults. This translates to different weights depending on your height — there's no single "ideal" weight that applies to everyone. For example, an adult who is 1.70m (5ft 7in) tall has a healthy weight range of approximately 53–72 kg (8st 5lbs to 11st 4lbs). For someone 1.75m (5ft 9in) tall, the healthy range is roughly 57–76 kg (9st 0lbs to 11st 13lbs). Your weight for height UK guidelines are based on this BMI framework. If you're above the healthy range, your GP may discuss lifestyle changes or, if appropriate, further management options. If you're below the healthy range, your GP can assess whether this raises any health concerns. The healthy weight range calculator on this page makes it easy to determine your target zone based on your exact 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.
Using Your BMI to Find Your Healthy Weight Range
The simplest way to discover your healthy weight range is to use the free BMI calculator on this page — it automatically converts your measurements into kg and stone, and shows you exactly where you fall on the NHS healthy weight scale. You enter your height and current weight, and the calculator instantly displays your BMI category and the weight range needed to reach a healthy BMI. For Welsh residents, the same thresholds apply as across the UK. If your current weight is above the healthy range, even a modest reduction — as little as 5–10% of your body weight — can improve blood pressure, blood sugar control, and cardiovascular health. Your GP can provide personalised guidance if you'd like support achieving a healthy weight for your height.
- 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 range for someone 5ft 8in tall in Wales?
For an adult 5ft 8in (1.73m) tall, a healthy weight range is approximately 55–74 kg (8st 9lbs to 11st 8lbs), based on an NHS BMI of 18.5–24.9. Use our free BMI calculator above to calculate your exact healthy range based on your height.
Is the healthy BMI range different in Wales compared to the rest of the UK?
No. Wales follows the same NHS BMI guidelines as England, Scotland, and Northern Ireland. A healthy BMI is 18.5–24.9 for most adults, regardless of which UK nation you live in.
How do I know if my weight is healthy for my height?
Calculate your BMI using your weight and height. A BMI of 18.5–24.9 indicates a healthy weight range. Our free BMI calculator on this page instantly shows you where you sit and what your target healthy weight range is.
What is considered average UK weight, and how does it compare to healthy weight?
The average UK adult weighs around 85.7 kg (13st 7lbs) for men and 71.6 kg (11st 3lbs) for women. However, average weight is not the same as healthy weight — many UK adults are overweight. A healthy weight depends entirely on your individual height and BMI.
Can I use an ideal weight calculator to find my healthy weight range in Wales?
Yes. Our free healthy weight calculator (the BMI calculator on this page) is the most reliable tool. It uses NHS guidelines to show your personalised healthy weight range in both kg and stone, adjusted for your exact height.
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.