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 16.3 Stone in Pounds and BMI?
16.3 stone equals 228.2 pounds (or 103.4 kg). However, your BMI — and what this weight means for your health — depends entirely on your height. At different heights, this weight produces very different BMI results, ranging from a healthy weight category to obese classifications. Use our free BMI calculator above to find your exact BMI, or read on to see examples at common UK heights and understand what each result means according to NHS guidelines.
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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 at 16.3 Stone — Examples by Height
At 16.3 stone (103.4 kg), your BMI varies significantly with height. Here are typical examples:
- 5ft 4in (163 cm): BMI ≈ 30.7 — Obese (Class I) category
- 5ft 6in (168 cm): BMI ≈ 28.7 — Overweight category
- 5ft 8in (173 cm): BMI ≈ 26.8 — Overweight category
- 5ft 10in (178 cm): BMI ≈ 25.0 — Upper healthy weight range
- 6ft 0in (183 cm): BMI ≈ 23.4 — Healthy weight category
- 6ft 2in (188 cm): BMI ≈ 22.0 — Healthy weight category
For South Asian, Chinese, Black African, or Black Caribbean adults, lower BMI thresholds apply — overweight starts at BMI 23.0 and obese at 27.5. Calculate your personal BMI using the free tool on this page for an exact figure based on your own height.
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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.
Understanding NHS BMI Categories and Limitations
The NHS BMI classifications are: healthy weight (18.5–24.9), overweight (25.0–29.9), obese Class I (30.0–34.9), obese Class II (35.0–39.9), and severely obese (40.0+). However, BMI has important limitations. It does not distinguish between muscle and fat — athletes may have high BMI but low body fat. BMI also ignores where fat is stored; waist circumference matters too. For meaningful health guidance, discuss your weight with your GP, especially if you have weight-related health conditions like high blood pressure or type 2 diabetes. Our weight converter can help you switch between stone, pounds, and kg whenever you need it.
- 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 16.3 stone in pounds exactly?
16.3 stone equals 228.2 pounds. To convert stone to pounds, multiply stone by 14 (since 1 stone = 14 pounds exactly). So 16.3 × 14 = 228.2 lbs. You can also convert to kilograms: 16.3 stone = 103.4 kg using our free weight converter above.
Is 16.3 stone a healthy weight?
It depends entirely on your height. At 5ft 10in, this weight gives a BMI of 25.0 (healthy range). At 5ft 4in, it gives a BMI of 30.7 (obese category). Use our free BMI calculator above with your exact height to discover your personal BMI and NHS category.
What does my BMI mean if I'm 16.3 stone?
BMI categories are: 18.5–24.9 (healthy), 25.0–29.9 (overweight), 30.0–34.9 (obese Class I). At 16.3 stone your BMI ranges from 22–31 depending on height. Your GP can advise on what your specific BMI means for your health, especially if you have weight-related conditions.
Should I try to lose weight at 16.3 stone?
This depends on your height, BMI, and overall health. If your BMI is in the healthy or overweight range, weight loss may not be necessary. If BMI is obese category, your GP can discuss whether weight loss would benefit your health. The NHS recommends safe loss of 0.5–1 kg per week through diet and physical activity.
Can I use BMI to track weight loss progress?
BMI is useful as a general health screening tool, but it doesn't show fat loss versus muscle loss. Many people prefer tracking waist circumference, how clothes fit, or energy levels. Our free progress tracker can help you log changes in weight, measurements, and how you feel over time.
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.