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
17 Stone Woman — UK Health Guide
17 stone equals approximately 108 kilograms or 238 pounds. For many women, this weight falls into the obese category according to NHS guidelines, though health status depends on height, age, body composition, and overall fitness. Understanding where your weight sits within NHS healthy weight ranges, and what this means for your health, is an important first step in making informed decisions about weight management. This guide provides UK-specific health context and practical next 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.
BMI, NHS Categories, and Health Context
At 17 stone (108kg), your BMI depends on your height. For example, a woman who is 5ft 6in (168cm) would have a BMI of approximately 35, which falls into the obese category (BMI 30–34.9) according to NHS guidelines. Use our free BMI calculator above to find your personal BMI based on your exact height and weight.
NHS weight categories for women:
- Underweight: BMI below 18.5
- Healthy weight: BMI 18.5–24.9
- Overweight: BMI 25–29.9
- Obese (Class I): BMI 30–34.9
- Obese (Class II): BMI 35–39.9
- Severely obese: BMI 40 and above
For women of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — a healthy weight BMI starts at 18.5 but overweight begins at 23. Being at 17 stone may represent a higher health risk for these groups and warrants discussion with your GP.
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.
Weight Management and Next Steps
If you're concerned about your weight and health, the first step is speaking with your GP, who can assess your individual health status, any weight-related conditions you may have, and what's realistic and healthy for you specifically. The NHS offers free weight management support through Tier 1 and 2 services in your area — these include digital tools, community programmes, and behaviour change support.
For those interested in weight loss options: If your GP assesses that you meet clinical criteria, you may be eligible for prescription weight loss treatment through NHS specialist services (Tier 3) or privately. Track your progress using our free progress tracker, and convert your weight between kg, stone, and pounds using our weight converter tool to 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.
Is 17 stone obese?
At 17 stone (108kg), whether you're classified as obese depends on your height and the NHS BMI categories. Generally, 17 stone will be in the obese range for most women. However, BMI doesn't account for muscle mass or individual health factors — your GP can give you personalised health guidance based on your full picture, not BMI alone.
What's the healthy weight range for a woman?
The NHS healthy weight range (BMI 18.5–24.9) for a woman depends on her height. For example, a woman 5ft 6in tall would have a healthy weight range of approximately 8st 2lbs to 10st 11lbs (52–68kg). Use our free BMI calculator to find the specific healthy weight range for your height.
Can I access weight loss support on the NHS at 17 stone?
Yes. Start with your GP, who can refer you to Tier 2 or Tier 3 NHS weight management services depending on your health profile and local availability. If you have weight-related health conditions (diabetes, high blood pressure, sleep apnoea), you may be eligible for prescription treatment or bariatric assessment. Waiting times vary significantly by region.
What are my options if I want to lose weight?
Options include NHS-supported behaviour change programmes, dietary changes (working with a dietitian if available), increased physical activity, and — if eligible — prescription weight loss medication through NHS specialist services or private prescribing. A sustainable approach combining diet, activity, and support gives the best long-term results.
How do I calculate my BMI at 17 stone?
Use our free BMI calculator on this page — it calculates your exact BMI instantly when you enter your height and current weight. You can also convert 17 stone to kilograms (108kg) and use the formula: BMI = weight (kg) ÷ height (metres)². The calculator gives you the fastest, most accurate result for your personal situation.
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.