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 63 Kg in Pounds and Stones?
63 kilograms is approximately 9 stone 11 pounds, or 138.9 pounds in imperial measurements. However, whether this weight is healthy depends entirely on your height. BMI is calculated using both weight and height together, so the same weight of 63 kg can fall into different health categories depending on how tall you are. Use our free BMI calculator above to find your personal BMI instantly, or read on to see example BMI values at common heights.
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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.
63 Kg BMI at Different Heights
To convert 63 kg to stone, divide by 6.35 to get 9 stone 11 pounds. But BMI is what matters for health screening. Here's how 63 kg translates to BMI at six common heights:
- 160 cm (5ft 3in): BMI 24.6 — healthy weight range (NHS)
- 165 cm (5ft 5in): BMI 23.1 — healthy weight range (NHS)
- 170 cm (5ft 7in): BMI 21.8 — healthy weight range (NHS)
- 175 cm (5ft 9in): BMI 20.6 — healthy weight range (NHS)
- 180 cm (5ft 11in): BMI 19.4 — healthy weight range (NHS)
- 185 cm (6ft 1in): BMI 18.4 — healthy weight range (NHS)
At 63 kg, most UK adults fall comfortably into the healthy weight bracket across a wide range of heights. Your GP can give personalised advice about your specific weight and health.
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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 BMI Categories and Weight Limits
The NHS defines healthy BMI as 18.5 to 24.9 for most adults. At 63 kg, you'll only reach overweight territory (BMI 25+) if you're significantly shorter than average — typically under 158 cm (5ft 2in). BMI has limitations: it doesn't distinguish between muscle and fat, so athletes may have a higher BMI despite low body fat. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends lower BMI thresholds due to higher health risks at the same weight. Use our weight converter above to check 63 kg in different units, and remember that even small changes in weight and fitness can improve health outcomes.
- 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 63 kg a healthy weight?
Yes, for most UK adults. 63 kg falls into the healthy BMI range (18.5–24.9) for anyone taller than about 158 cm (5ft 2in). Your personal health depends on your height, age, muscle mass, and overall fitness. Your GP can advise on what's healthy for you specifically.
What is 63 kg in stones and pounds exactly?
63 kg equals 9 stone 11 pounds (9st 11lbs), or 138.9 pounds. To convert kilograms to stone, divide by 6.35029. The weight converter on this page does this calculation instantly for you.
What BMI would 63 kg give at 5ft 8in?
At 173 cm (5ft 8in), 63 kg gives a BMI of approximately 21.0, which is solidly in the healthy range. Use our free BMI calculator above to check your exact BMI for your height.
Is BMI the only measure of healthy weight?
No. BMI is a useful screening tool but has limitations. Waist circumference, muscle mass, fitness level, and overall health are equally important. The NHS recommends assessing weight health through multiple measures, not BMI alone.
How do I know if I need to lose or gain weight at 63 kg?
Your GP or healthcare professional can assess whether your weight is healthy for you based on your height, health history, and any medical conditions. They can also advise on safe, sustainable changes if needed.
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.