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
90kg in Pounds — What You Need to Know
90 kilograms is equal to 198.4 pounds (or approximately 198 lbs). This conversion is useful whether you're checking your own weight, understanding health information, or simply converting between metric and imperial measurements. In the UK, we typically use stone and pounds for body weight, so knowing how to convert between kg and pounds helps you understand NHS health guidance and compare your weight against UK health standards. Use our free weight converter above to instantly switch between kilograms, pounds, and stone.
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.
What Does 90kg Mean for UK Health?
At 90kg, your health context depends on your height and individual circumstances. Using NHS weight guidance, a person at 90kg would typically fall into the overweight or obese category according to standard BMI classifications, though the exact category varies based on height. For example, someone 5ft 7in (170cm) tall with a weight of 90kg would have a BMI of approximately 31.5, which falls into the obese (Class I) category according to NHS guidelines.
- For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, NHS guidance suggests lower BMI thresholds apply, meaning health risks may emerge at lower weights
- Waist measurement is also important — excess weight carried around the stomach poses higher health risks than weight distributed elsewhere
- Even modest weight loss of 5–10% of body weight (4.5–9kg in this case) can have meaningful health benefits
Use our free BMI calculator above to check your personal BMI and see where you fall on the NHS health weight scale.
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.
Converting 90kg to Other Units
If you prefer stone and pounds — the traditional UK measurement — 90kg equals 14 stone and 3 pounds (14st 3lbs). This conversion is particularly useful because many UK health resources, clothing sizes, and weight management programmes still use stone and pounds. You can also use our free weight converter on this page to switch instantly between kilograms, pounds, stone, and any other combination you need.
- 90kg = 198.4 pounds (lbs)
- 90kg = 14 stone 3 pounds (14st 3lbs)
- Conversion formula: multiply kg by 2.20462 to get pounds
- 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 or obese for an adult in the UK?
Whether 90kg is overweight or obese depends on height. Use your height with the BMI calculator above to find your exact category according to NHS guidelines. Generally, 90kg falls into the overweight to obese range for most adults, though individual health risk varies.
What is 90kg in stone and pounds?
90kg equals 14 stone and 3 pounds (14st 3lbs). Stone and pounds are still commonly used in the UK for body weight, so this conversion is useful for understanding health advice and comparing weight against UK standards.
How much weight would I need to lose from 90kg to reach a healthy weight?
This depends on your height. Use the BMI calculator to find your healthy weight range based on NHS guidelines. For many adults at 90kg, losing 10–20kg could bring them into a healthy BMI range, though your GP can advise on what's realistic for your circumstances.
Why does the NHS use different weight categories for different ethnic groups?
Research shows that South Asian, Chinese, Black African, and Black Caribbean adults have higher health risks at lower BMI levels compared to other populations. NHS guidance reflects this by recommending lower BMI thresholds for these groups — typically starting at 23 BMI rather than 25.
Can I convert my weight between kilograms and pounds myself?
Yes — multiply kilograms by 2.20462 to get pounds, or divide pounds by 2.20462 to get kilograms. For 90kg, that's 90 × 2.20462 = 198.4 pounds. Our free weight converter above does this instantly for any weight.
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.