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 90 Kg in Pounds and Stone?
90 kilograms converts to 14 stone and 2 pounds (14st 2lbs), or 198.4 pounds. However, whether this weight is healthy depends entirely on your height. The same weight can give a very different BMI — and different NHS health category — depending on how tall you are. Use our free BMI calculator above to find your personal BMI, or read on to see where 90kg sits at common UK 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.
90 Kg BMI at Different Heights
At 90kg, your BMI varies significantly by height. Here's what 90kg means for BMI across typical UK heights:
- 5ft 4in (163cm): BMI of 33.6 — obese (Class I)
- 5ft 6in (168cm): BMI of 31.9 — obese (Class I)
- 5ft 8in (173cm): BMI of 30.1 — obese (Class I)
- 5ft 10in (178cm): BMI of 28.4 — overweight
- 6ft 0in (183cm): BMI of 26.8 — healthy weight
- 6ft 2in (188cm): BMI of 25.4 — healthy weight
These figures use the standard kilogram to stone conversion and NHS BMI categories. Your GP can discuss what these figures mean for your personal health context.
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.
Understanding NHS BMI Categories and Limitations
The NHS uses these BMI ranges for adults: healthy weight (18.5–24.9), overweight (25.0–29.9), obese Class I (30.0–34.9), obese Class II (35.0–39.9), and severely obese (40.0+). At 90kg, you'll fall into one of these depending on your height and frame. However, BMI has real limitations — it doesn't distinguish between muscle and fat, doesn't account for where fat is stored, and may be less accurate for older adults or very muscular individuals. Weight in stone and pounds is useful for tracking, but your waist measurement and overall health matter too. Our weight converter helps you track between metric and imperial easily.
- 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.
What is 90 kg in stone and pounds exactly?
90 kg equals 14 stone and 2 pounds (14st 2lbs), or 198.4 pounds. To convert kilograms to stone, divide the kg figure by 6.35029. This converts your weight into the traditional UK measurements used for health discussions and BMI calculation.
Is 90 kg a healthy weight?
This depends on your height. At 5ft 10in, 90kg gives a BMI of 28.4 (overweight). At 6ft 0in, it's a BMI of 26.8 (healthy weight). Use our BMI calculator to check your personal figure. Your GP can provide personalised advice about whether this weight is healthy for you.
What BMI will I have at 90 kg?
Your BMI at 90kg depends on your height. Generally, it ranges from around 26.8 to 33.6 depending on whether you're 6ft tall or 5ft 4in. Height makes a huge difference — taller individuals will have a lower BMI at the same weight.
How do I convert 90 kg to stone myself?
Divide 90 by 6.35029 to get stone (14.2 stone). To convert the decimal to pounds, multiply the decimal part by 14: 0.2 × 14 = 2.8 pounds, giving you 14st 2lbs. Alternatively, use our free weight converter above for instant accuracy.
What's the healthy weight range for my height at 90 kg?
At 90kg, you can use the NHS BMI calculator to find the healthy weight range for your specific height. A healthy BMI is 18.5–24.9. Your GP or a healthcare professional can discuss whether adjusting your weight would benefit your individual health profile.
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.