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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What is 16.7 kg in stone?
16.7 kg is equal to 2 stone and 8.3 pounds (2st 8.3lbs). This is a straightforward kg to stone conversion using the standard UK measurement system. To convert kilograms to stone, you divide the kilogram value by 6.35029. At this weight, your BMI and health context depend entirely on your height — we'll show you how to interpret this weight across different heights below. Use our free weight converter above to switch between metric and imperial measurements instantly.
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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.
Conversion table: nearby weights in stone and pounds
Here are weights near 16.7kg converted to stone and pounds format for easy reference:
- 14 kg = 2st 3.2lbs
- 15 kg = 2st 5.1lbs
- 16 kg = 2st 7.0lbs
- 16.7 kg = 2st 8.3lbs
- 17 kg = 2st 9.2lbs
- 18 kg = 2st 11.2lbs
- 19 kg = 2st 13.2lbs
Formula: To convert kilogram to stone conversion, divide kg by 6.35029. For 16.7 kg: 16.7 ÷ 6.35029 = 2.63 stone. Multiply the decimal by 14 to get pounds: 0.63 × 14 = 8.8lbs, giving you 2st 8.3lbs.
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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.
16.7 kg BMI and healthy weight context
At 16.7 kg, your health profile depends on your height. For example, at 150cm (4ft 11in) height, 16.7kg gives a BMI of 7.4 — significantly underweight. At 163cm (5ft 4in), the BMI is 6.3. At 175cm (5ft 9in), it's 5.4. These BMI calculations show that 16.7kg is an extremely low body weight for any adult height. NHS guidelines recommend a healthy weight range with a BMI between 18.5 and 24.9. If you weigh 16.7kg, speak with your GP about your individual health, as this weight may indicate serious health concerns that require medical support.
- 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 16.7 kg to stone and pounds manually?
Divide 16.7 by 6.35029 to get stone (2.63). Then multiply the decimal part (0.63) by 14 to get pounds (8.8). So 16.7kg = 2 stone 8.8 pounds. You can also use our free weight converter on this page for gradual improvement.
Is 16.7 kg a healthy weight?
16.7kg is an extremely low body weight for any adult. A healthy weight depends on your height and sex, but NHS guidelines recommend a BMI between 18.5 and 24.9. At all typical adult heights, 16.7kg falls well below healthy thresholds. Always consult your GP if your weight is significantly below recommended ranges.
What is the exact stone to kilogram conversion formula?
The exact formula is: 1 stone = 6.35029 kg. To convert any kilogram value to stone, divide the kg by 6.35029. Conversely, to convert stone to kg, multiply the stone value by 6.35029. Our weight converter uses these precise values.
How does 16.7 kg relate to average UK adult weight?
The average UK adult man weighs approximately 85.7kg (13st 7lbs), and the average UK adult woman weighs approximately 71.6kg (11st 3lbs). At 16.7kg, this weight is significantly lower than both averages. If this is your current weight, seeking GP advice is important for your health.
Can I use this conversion for children's weight?
Yes, you can use the kg to stone conversion formula for any age. However, healthy weight for children is assessed using BMI centile charts specific to age and sex, not adult BMI categories. Always refer to your health visitor or GP for children's healthy weight 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.