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
Weight Calculator From Height — Find Your Healthy Range
Calculating your healthy weight from your height is one of the most practical ways to understand what a normal weight range should be for your body. Rather than guessing, you can use simple formulas and NHS health guidelines to determine a realistic target. Your height directly determines your healthy weight range, and this guide explains how to calculate it accurately using UK measurements and evidence-based health data. Our free BMI calculator above instantly works out your healthy weight range from your height — just enter your measurements and get personalised results.
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 to Calculate Healthy Weight From Your Height
Your healthy weight depends on your height. The NHS uses BMI (body mass index) to define healthy weight ranges, and this is calculated using your height and weight together. The simplest method is to use the BMI formula: BMI = weight (kg) ÷ height (m)². A healthy BMI is between 18.5 and 24.9 according to NHS guidelines.
To find your healthy weight range from your height, you can work backwards from these BMI thresholds:
- Lower healthy weight: 18.5 × height(m)² = minimum healthy weight in kg
- Upper healthy weight: 24.9 × height(m)² = maximum healthy weight in kg
For example, if you are 1.73m tall (5ft 8in), your healthy weight range is approximately 55.4 kg (8st 10lbs) to 74.5 kg (11st 10lbs). Use our weight converter to switch between kg, stone, and pounds for UK measurements. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — a healthy BMI starts at 18.5 but upper limit is 22.9 rather than 24.9.
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 a Weight Calculator Tool vs a UK pharmacy Calculation
Calculating by hand works, but a free weight calculator is faster and more accurate. MyWeightCheck's BMI calculator above instantly calculates your healthy weight range from your height — simply enter your height and current weight, and it shows your BMI category and healthy weight target in both kg and stone. This saves time and removes calculation errors. a UK pharmacy methods using formulas are useful to understand the maths, but the calculator provides instant personalised results aligned with NHS guidance. You can also use the weight converter tool on this page to switch between different measurements (kg to stone, kg to pounds) for UK health context.
- 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 healthy weight for a UK adult of my height?
Average healthy weight varies widely by height. For a 5ft 8in adult (1.73m), the healthy range is roughly 55–75 kg (8st 10lbs to 11st 10lbs). For a 5ft 4in adult (1.63m), it's roughly 50–65 kg (7st 12lbs to 10st 3lbs). Use our BMI calculator to find your specific range based on your exact height.
Is there a weight calculator that works for UK stone and pounds?
Yes. MyWeightCheck's weight calculator above works in both metric (kg) and imperial (stone and pounds). Simply enter your height and weight in your preferred measurement, and it calculates your BMI and healthy weight range instantly. You can also use our separate weight converter to translate between units.
Can I use height and weight calculators to manage weight loss?
Yes. A weight calculator helps you set realistic targets and track progress toward your healthy weight range. For sustainable weight loss, combine it with a reduced-calorie diet and increased physical activity. If you are interested in weight loss support, your GP can advise on NHS options or referral to specialist weight management services.
Does healthy weight change based on age or ethnicity?
BMI categories are the same across all ages for adults. However, the NHS recommends lower BMI thresholds for adults of South Asian, Chinese, Black African, or Black Caribbean heritage due to higher health risks at the same BMI. Elderly adults may need individual assessment as muscle mass naturally decreases with age.
How often should I recalculate my healthy weight range?
Your healthy weight range does not change unless your height changes (which is rare in adults). Recalculate your BMI regularly to monitor your weight and progress toward your target. Many people track monthly or quarterly to stay motivated and catch any significant changes early.
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.