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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17.4kg in Stone — Healthy Weight Guide for UK Adults
17.4kg converts to 2 stone 10 pounds (2st 10lbs). Whether this weight is healthy for you depends entirely on your height, age, and overall fitness. A weight that's perfectly healthy for one person might be underweight or overweight for another. Using a simple kg to stone conversion isn't enough — you need to understand your personal healthy weight range according to NHS guidelines. This guide explains how to determine if 17.4kg is right for your height, with practical examples and actionable steps.
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 Ranges by Height
To know if 17.4kg (2st 10lbs) is healthy for you, compare it against the NHS healthy BMI range of 18.5 to 24.9 for your height. The table below shows healthy weight ranges for common UK heights. These ranges are calculated using BMI thresholds and assume an adult aged 18 or over. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, slightly lower ranges may apply due to higher health risk at lower BMI levels.
- At 150cm (4ft 11in): healthy weight range is 42–63kg (6st 8lbs to 9st 13lbs)
- At 160cm (5ft 3in): healthy weight range is 47–75kg (7st 5lbs to 11st 11lbs)
- At 170cm (5ft 7in): healthy weight range is 53–85kg (8st 5lbs to 13st 5lbs)
- At 180cm (5ft 11in): healthy weight range is 60–95kg (9st 6lbs to 14st 13lbs)
You can calculate your exact healthy weight range using our free BMI calculator on this page, which works with your personal height and displays results in both stone and kilograms.
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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.
NHS Guidance and Next Steps
If 17.4kg falls below your healthy weight range for your height, you may be underweight. The NHS recommends speaking with your GP about nutrition, exercise, and overall health. If you're concerned about your weight — whether you're above or below the healthy range — your GP can provide personalised advice tailored to your individual circumstances.
Waist measurement also matters: Even if your BMI is healthy, where you carry weight matters. Excess weight around the stomach increases health risks more than weight distributed elsewhere. Men should aim for a waist under 94cm (37in); women under 80cm (31.5in). Our free weight converter and progress tracker can help you monitor changes over time.
- 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.
How do I convert 17.4kg to stone and pounds?
17.4kg equals 2 stone 10 pounds (2st 10lbs). To convert any kg to stone, divide by 6.35. For pounds, multiply kg by 2.20462. Our free weight converter above calculates this instantly in both directions.
Is 17.4kg a healthy weight for an adult?
It depends on your height. 17.4kg is a healthy weight only for very short adults (around 150cm or under). For most UK adults, this would be underweight. Use our free BMI calculator to check if 17.4kg is healthy for your specific height and age.
What should I do if I'm below my healthy weight range?
If you're underweight, speak with your GP. They can assess your nutrition, check for underlying health issues, and provide guidance on healthy weight gain if needed. Underweight can also carry health risks, so personalised advice from a healthcare professional is important.
How is healthy weight calculated in the UK?
The NHS uses BMI (Body Mass Index), calculated as weight in kg divided by height in metres squared. A BMI of 18.5 to 24.9 is considered healthy for most adults. Lower thresholds apply to people of South Asian, Chinese, Black African, and Black Caribbean heritage.
Can I use weight alone to check my health?
No. Weight is just one indicator. Your height, age, muscle mass, and where you carry weight all matter. Waist measurement is also important — excess belly fat increases health risks. Your GP can assess your overall health picture and provide personalised guidance.
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.