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 58.9 kg in stones?
58.9 kilograms is equal to 9 stone and 4.7 pounds (9st 4.7lbs). If you need to convert kilograms to stone regularly, understanding the conversion formula makes it simple: divide kilograms by 6.35029 to get stone. This weight falls into the healthy weight range for most UK adults, depending on height. Use our free weight converter above to instantly switch between kg, stone, and pounds for any weight value. The conversion is straightforward, but context matters—your BMI and overall health depend on both your weight and height together.
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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 formula and nearby weight values
To convert any weight from kilograms to stone, use this simple formula: kg ÷ 6.35029 = stone. For 58.9kg, the calculation is: 58.9 ÷ 6.35029 = 9.27 stone (which is 9 stone and 4.7lbs).
Here are weights near 58.9kg with their stone equivalents:
- 55kg = 8st 9.6lbs
- 56kg = 8st 13.1lbs
- 57kg = 8st 12.3lbs
- 58.9kg = 9st 4.7lbs
- 60kg = 9st 6.4lbs
- 61kg = 9st 9.9lbs
- 62kg = 9st 11.7lbs
These conversions use the standard metric to imperial weight conversion recognised by NHS health services. If you're tracking your weight in different units, our weight converter tool on this page makes switching between kg, stone, and pounds instant and accurate.
Clinically BackedWeight Loss
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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.
BMI context and healthy weight at 58.9kg
At 58.9kg, whether you're at a healthy weight depends entirely on your height. For example, someone who is 163cm tall (5ft 4in) with a weight of 58.9kg would have a BMI of approximately 22.1—falling comfortably in the healthy weight range (BMI 18.5–24.9) according to NHS guidelines. However, someone 173cm tall (5ft 8in) at the same weight would have a BMI of around 19.7, also healthy. Use our free BMI calculator above to check your personal BMI instantly by entering your height and current weight. BMI is a useful screening tool, though it doesn't account for muscle mass or body composition.
- 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 58.9kg to stones and pounds manually?
Divide 58.9 by 6.35029 to get 9.27 stone. The decimal (0.27) converts to pounds by multiplying by 14: 0.27 × 14 = 3.78 pounds. So 58.9kg = 9 stone 3.8 pounds (or 9st 4.7lbs when rounded). Use our weight converter for gradual improvement.
Is 58.9kg a healthy weight?
It depends on your height. 58.9kg is within the healthy weight range for most UK adults of average height. Your BMI is the key indicator—check yours using our free BMI calculator above. For context, NHS guidelines recommend a BMI between 18.5 and 24.9 for most adults.
What's the formula for converting kg to stone?
The formula is simple: kg ÷ 6.35029 = stone. Alternatively, if you want the result in stone and pounds, divide the decimal portion by 6.35029 and multiply by 14. Our weight converter does this automatically for any weight value.
How many kilos is 9 stone?
9 stone equals approximately 57.15 kilograms. One stone is exactly 6.35029kg. If you need the reverse conversion from stone to kg, multiply the stone value by 6.35029. Use our weight converter for quick conversions either direction.
What weight should I aim for at my height?
Your healthy weight range depends on your height and is based on achieving a BMI between 18.5 and 24.9. Use our free BMI calculator above—enter your height and it will show you the healthy weight range in both kg and stone. Your GP can also advise on a healthy target weight for your individual circumstances.
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.