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 63.3 kg in stone and pounds?
63.3 kg is equivalent to 9 stone 13.7 pounds (or 9st 13.7lbs). However, whether this weight is healthy depends entirely on your height. BMI is calculated using both weight and height, so the same weight can be in the healthy range for one person and overweight for another. This guide shows what BMI 63.3 kg gives you at different heights, plus how it compares to NHS health categories.
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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.
63.3 kg BMI at different heights
Your BMI depends on your height. Below are example BMI calculations for 63.3 kg at six common adult heights, showing which NHS category each falls into:
- At 155 cm (5ft 1in): BMI = 26.3 (overweight)
- At 160 cm (5ft 3in): BMI = 24.8 (healthy weight)
- At 165 cm (5ft 5in): BMI = 23.3 (healthy weight)
- At 170 cm (5ft 7in): BMI = 21.9 (healthy weight)
- At 175 cm (5ft 9in): BMI = 20.6 (healthy weight)
- At 180 cm (5ft 11in): BMI = 19.5 (healthy weight)
Use our free BMI calculator above to enter your exact height and see your personal BMI instantly. The same weight gives very different BMI values depending on how tall you are — that's why height matters as much as weight for health assessment.
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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
The NHS classifies BMI ranges to help identify health risk:
- Below 18.5: Underweight
- 18.5–24.9: Healthy weight
- 25.0–29.9: Overweight
- 30.0–34.9: Obese (Class I)
- 35.0–39.9: Obese (Class II)
- 40.0+: Severely obese (Class III)
If you're of South Asian, Chinese, Black African, or Black Caribbean heritage, slightly lower thresholds apply — ask your GP for personalised guidance. BMI is a screening tool, but it doesn't account for muscle mass or where fat is stored, so your GP is the best source for advice on what your weight means for your health.
- 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 63.3 kg to stone and pounds?
Divide 63.3 by 6.35 to get stone (9.97 stone), then multiply the decimal by 14 to get pounds. This equals 9 stone 13.7 pounds. Alternatively, use our free weight converter on this page to switch between kg, stone, and pounds instantly.
Is 63.3 kg a healthy weight?
It depends on your height. At 160–180 cm, 63.3 kg typically gives a healthy BMI. Below 160 cm it may be overweight, and above 180 cm it may be underweight. Use our BMI calculator to check your personal BMI — it takes just seconds.
What's the BMI formula used here?
BMI = weight in kilograms divided by height in metres squared. For 63.3 kg at 170 cm (1.70m): 63.3 ÷ (1.70 × 1.70) = 21.9. This falls in the healthy weight category according to NHS guidelines.
Can I lose or gain weight to reach a healthy BMI?
Yes. A healthy BMI range for your height can be calculated by your GP or using NHS guidelines. Safe, sustainable weight change is typically 0.5–1 kg per week. Your GP can advise on diet, physical activity, and whether weight management support or medication might help.
What if I'm taller or shorter than the examples shown?
The BMI calculator on this page works for any height. Enter your exact height in centimetres or feet and inches, your weight, and you'll get your personal BMI and NHS category instantly.
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.