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
Is 58.9 Kg in Stone a Healthy Weight?
58.9 kilograms equals approximately 9 stone and 3 pounds (9st 3lbs) in UK measurements. Whether this is a healthy weight depends entirely on your height. Using our free BMI calculator above, you can check your personal BMI instantly. For adults, the NHS recommends a healthy BMI of 18.5 to 24.9, though thresholds are lower for people of South Asian, Chinese, Black African, or Black Caribbean heritage. This page shows you how to convert kilograms to stone and explains what a healthy weight range means for your height.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
Healthy Weight Ranges by Height at 58.9 kg
At 58.9 kg (9st 3lbs), whether you're at a healthy weight depends on your height. Here are three real examples:
- At 150 cm (4ft 11in): BMI = 26.2 (overweight category). Healthy weight range: 41.6–51.9 kg (6st 8lbs–8st 2lbs).
- At 165 cm (5ft 5in): BMI = 21.6 (healthy weight category). Healthy weight range: 50.3–67.6 kg (7st 13lbs–10st 9lbs).
- At 180 cm (5ft 11in): BMI = 18.1 (underweight category). Healthy weight range: 59.9–80.6 kg (9st 5lbs–12st 9lbs).
Use the weight converter on this page to see your weight in different units. The BMI calculator will show your exact category based on your specific measurements.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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 Guidance and What to Do Next
The NHS emphasises that a healthy weight is personal and depends on age, sex, muscle mass, and ethnicity. If your BMI falls outside the healthy range (18.5–24.9), speak to your GP, who can discuss your individual health. Waist circumference also matters: men should aim for under 94 cm (37 inches), women under 80 cm (31.5 inches). Even small changes can improve health. If you're working towards a healthier weight, our free progress tracker helps you log and monitor changes over time. Remember, sustainable weight management combines balanced nutrition with physical activity.
- 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 58.9 kg to stone and pounds?
58.9 kg equals 9 stone and 3 pounds (9st 3lbs). To convert kilograms to stone, divide by 6.35. For pounds, multiply kilograms by 2.20462. Our free weight converter above does this instantly.
Is 58.9 kg considered overweight for an adult?
It depends on your height. At 165 cm (5ft 5in), 58.9 kg is healthy. At 150 cm (4ft 11in), it's overweight. Use our BMI calculator to find your personal category based on your exact measurements.
What's the healthy weight range for someone 168 cm tall?
At 168 cm (5ft 6in), the healthy BMI range of 18.5–24.9 corresponds to 52.2–66.4 kg (8st 3lbs–10st 5lbs). 58.9 kg falls within this range, so it would be considered healthy at this height.
My BMI shows I'm overweight — what should I do?
Speak to your GP who can assess your overall health, discuss lifestyle changes, and recommend appropriate support. The NHS recommends sustainable weight loss of 0.5–1 kg per week. Small dietary changes and increased activity often make a real difference.
Do ethnicity thresholds change if my weight is 58.9 kg?
Yes. Adults of South Asian, Chinese, Black African, or Black Caribbean heritage have lower healthy BMI thresholds (18.5–22.9). At 58.9 kg, your healthy weight range may be narrower. Your GP can explain what this means for your health.
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.