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
90 Kilos in Stones — Quick Conversion
90 kilograms is equal to 14 stone and 2 pounds. This is a straightforward kg to stone conversion using the standard metric to imperial weight formula. At this weight, your health context depends on your height and overall fitness level. The NHS uses both metric and imperial measurements, so understanding how to convert kilograms to stone is useful for tracking your weight across different UK health resources and medical appointments.
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.
How to Convert 90kg to Stone
To convert 90 kilos to stones and pounds, divide the kilogram amount by 6.35029. Here's the calculation: 90 ÷ 6.35029 = 14.18 stone, which equals 14 stone 2.6 pounds (commonly rounded to 14 stone 2 lbs).
The conversion formula is straightforward: weight in kg ÷ 6.35029 = weight in stone. Alternatively, you can use the reverse: 1 stone = 6.35029 kg.
- 90 kg = 14 stone 2 lbs
- Exact metric: 14.18 stone
- In pounds only: 198.4 lbs
Use our free weight converter above to instantly switch between kilograms, stones, and pounds whenever you need it. This is especially helpful when comparing your weight across NHS resources, gym records, or online health calculators that use different units.
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.
BMI and Health Context at 90kg
At 90 kg, your BMI depends on your height. For example, at an average UK adult height of 1.73m (5ft 8in), a weight of 90kg gives a BMI of approximately 30.1, which falls in the obese category according to NHS guidelines. At 1.65m (5ft 5in), the BMI would be around 33.1, also in the obese range.
However, BMI has limitations — it doesn't distinguish between muscle and fat. Calculate your personal BMI using our free BMI calculator above, which takes your height and weight into account. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends lower thresholds for health risk, so eligibility for weight management support may differ. Your GP can provide personalised health guidance based on your individual circumstances.
- 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 90kg overweight for an adult?
Whether 90kg is overweight depends on your height. At average UK heights (165–180cm), 90kg typically falls into the overweight or obese BMI range. Your GP can assess your individual health context, as BMI is just one health indicator. Muscle mass, fitness level, and weight-related health conditions also matter.
What is 90 kilos in stones and pounds exactly?
90 kilograms equals 14 stone and 2.6 pounds (rounded to 14 stone 2 lbs). The precise conversion uses the formula: 90 ÷ 6.35029 = 14.18 stone. You can also express this as 198.4 pounds in imperial measurement.
What should I weigh if I'm 5ft 8in and currently 90kg?
At 5ft 8in (173cm), a healthy weight range is approximately 55–74kg (8st 10lbs to 11st 10lbs) according to NHS BMI guidelines. If you're currently 90kg at this height, you might benefit from speaking with your GP about sustainable weight management options, which could include lifestyle changes, dietary support, or prescription medication where appropriate.
How does 90kg compare to average UK weight?
The average UK adult male weighs approximately 85.7kg (13st 7lbs), so 90kg is slightly above average. The average UK adult female weighs approximately 71.6kg (11st 3lbs), making 90kg considerably higher for women. These are averages only — healthy weight varies significantly by height, age, and muscle mass.
Can I use a weight converter to check 90kg in different units?
Yes, our free weight converter on this page instantly converts 90kg to stones, pounds, and other units. It's helpful for comparing your weight across NHS appointments, gym records, and online health calculators that use different measurement systems. You can also use it for any other weight value you need to convert.
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.