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 90kg in Stone?
90kg is equal to 14 stone and 2 pounds (14st 2lbs). This conversion uses the standard kilogram to stone conversion formula where one stone equals 6.35029 kilograms. If you need to convert your weight between metric and imperial units, our free weight converter above can help you switch between kg, stone, and pounds instantly. Understanding your weight in both measurement systems is useful for tracking health metrics, comparing UK health guidelines, and monitoring your progress over time.
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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.
90kg to Stone — Conversion Table
To convert 90kg to stone, divide the kilogram value by 6.35029. Here's a quick reference table showing 90kg alongside nearby weights so you can see how this compares:
- 85kg = 13st 5lbs
- 87kg = 13st 10lbs
- 88kg = 13st 12lbs
- 90kg = 14st 2lbs
- 92kg = 14st 7lbs
- 94kg = 14st 12lbs
- 95kg = 15st 0lbs
This conversion works the same way whether you're tracking weight in kilos in stone or converting for health assessments. The formula is simple: kg ÷ 6.35029 = stone. You can also multiply kg by 2.20462 to get pounds, then divide by 14 to convert to stone and pounds.
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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.
90kg — BMI and Healthy Weight Context
At 90kg, your BMI depends on your height. For example, at 1.73m (5ft 8in), a weight of 90kg gives a BMI of 30.1, which falls into the obese category according to NHS guidelines. At 1.80m (5ft 11in), the same 90kg gives a BMI of 27.8 (overweight category). A healthy weight at these heights would typically range from 55–75kg and 60–80kg respectively. Use our free BMI calculator above to check your personal BMI and see where you fall within NHS healthy weight ranges.
- 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 90kg to stone and pounds?
Divide 90 by 6.35029 to get stone. 90kg ÷ 6.35029 = 14.18 stone. The decimal converts to pounds by multiplying by 14: 0.18 × 14 = 2.52 pounds. So 90kg = 14 stone 2 pounds (14st 2lbs).
Is 90kg a healthy weight?
It depends on your height and other health factors. At average UK heights (5ft 8in to 5ft 11in), 90kg typically falls into the overweight or obese BMI categories. NHS healthy weight ranges vary by height. Calculate your personal BMI using our free calculator above for context tailored to you.
What is the stone to kg conversion formula?
One stone equals 6.35029 kilograms. To convert stone to kg, multiply the stone value by 6.35029. For example, 10 stone × 6.35029 = 63.5kg. For the opposite direction (kg to stone), divide by 6.35029. This is the standard kilogram to stone conversion used across UK health services.
How much is 90kg in pounds only?
90kg multiplied by 2.20462 (the conversion factor) equals approximately 198.4 pounds (or 198lbs). This is a straight kilogram to pounds conversion. In UK usage, weight is typically expressed as stone and pounds combined rather than pounds alone, which is why 14st 2lbs is more common than 198lbs.
What is a healthy weight range in stone?
For UK adults, a healthy BMI of 18.5–24.9 typically translates to weight ranges in stone that vary by height. For example, at 5ft 8in, healthy weight is roughly 8st 10lbs to 11st 10lbs. At 5ft 11in, it's approximately 9st 7lbs to 12st 7lbs. Our BMI calculator helps you find your specific healthy weight range based on your exact height.
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.