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 Normal Weight For Your Height?
Normal weight for height is determined by your BMI (body mass index), which measures your weight relative to your height. According to NHS guidelines, a healthy weight range for adults falls between a BMI of 18.5 and 24.9. However, your ideal body weight depends on your specific height, age, and individual circumstances. This guide explains how to find your healthy weight range in both kilograms and stone, and shows you how to interpret your results in an NHS context.
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.
Healthy Weight Range By Height Using BMI
The NHS uses BMI to define healthy weight ranges for adults. To calculate your healthy weight range, multiply your height (in metres, squared) by 18.5 and 24.9. For example, if you are 1.70m tall (5ft 7in), your healthy weight range is approximately 53–71 kg (8st 5lbs to 11st 2lbs). If you are 1.75m tall (5ft 9in), your healthy weight range is approximately 56–76 kg (8st 12lbs to 12st 0lbs).
These ranges apply to most adults. However, for people of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — a healthy BMI is 18.5–22.9 rather than 18.5–24.9, because these populations have higher health risks at higher BMI levels. Your GP can provide personalised guidance on what healthy weight means for you. Use our free BMI calculator above to find your exact healthy weight range instantly.
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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.
How To Calculate Your Personal Healthy Weight Range
To find your healthy weight range, you need your height and current weight. Our free weight converter and BMI calculator on this page let you switch between kg and stone instantly, and calculate your BMI in seconds. Simply enter your height and weight, and the calculator shows you where you fall on the NHS health scale. If your weight is outside the healthy range, even a modest loss of 5–10% of your body weight can bring significant health benefits. Your GP can discuss realistic targets and lifestyle approaches suited to your 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 normal weight for a 5ft 7in tall woman?
For a woman 5ft 7in (1.70m) tall, the NHS healthy weight range is approximately 53–71 kg (8st 5lbs to 11st 2lbs). This assumes a BMI between 18.5 and 24.9. If you have a different ethnic background, your GP may recommend a different range. Use our BMI calculator to check your personal healthy range.
What is considered a normal weight for a 5ft 10in tall man?
For a man 5ft 10in (1.78m) tall, the healthy weight range is approximately 56–79 kg (8st 12lbs to 12st 6lbs) based on NHS guidelines. This represents a BMI of 18.5–24.9. Your ideal weight within this range depends on muscle mass, frame size, and overall fitness. Your GP can advise on your personal target.
How is healthy weight different from average UK weight?
Average UK weight is what most adults currently weigh (around 85 kg for men, 71 kg for women), but this is higher than the healthy weight range. Average weight does not mean healthy weight. The average UK adult BMI is around 27–28, which falls in the overweight category. Healthy weight aims to reduce disease risk.
Does healthy weight range change with age?
BMI categories remain the same across adulthood, but muscle mass naturally decreases with age. Older adults may need slightly higher weight to maintain muscle, and BMI alone becomes less accurate. Your GP or a healthcare professional can assess whether your weight is healthy for your age and circumstances.
Can I use a healthy weight calculator instead of BMI?
Yes. Our free BMI calculator on this page automatically calculates your healthy weight range based on your height. It also shows your current BMI category instantly. You can also use our weight converter to translate between kg, stone, and pounds to understand your weight in familiar UK measurements.
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.