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
How Much Is 90 Kg In Stone?
90 kilograms is equal to 14 stone and 3 pounds (14st 3lbs). This conversion uses the standard metric-to-imperial formula where 1 kilogram equals 0.157473 stone. If you're checking your weight in UK measurements or comparing health information, understanding how to convert between kg and stone is essential for using NHS guidance, interpreting health charts, and discussing weight with your GP. Use our free weight converter above to switch between kg, stone, and pounds instantly.
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.
90 Kg in Context: Is This a Healthy Weight?
Whether 90 kg is a healthy weight depends entirely on your height, age, and individual health profile. The most practical way to assess this is using BMI (Body Mass Index), which combines weight and height. For example, at a height of 1.70m (5ft 7in), a weight of 90 kg gives a BMI of approximately 31.1, which falls into the obese category (BMI 30–34.9) according to NHS guidelines. However, at 1.80m (5ft 11in), the same weight produces a BMI of 27.8, classified as overweight (BMI 25–29.9). The NHS recommends a healthy BMI range of 18.5 to 24.9 for most adults, though lower thresholds apply for adults of South Asian, Chinese, Black African, or Black Caribbean heritage. Calculate your personal BMI using our free BMI calculator on this page to understand what 90 kg means for your individual health profile.
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 Healthy Weight Guidance and Next Steps
At 90 kg, if your BMI falls outside the healthy range, the NHS recommends speaking with your GP, who can assess your individual health and discuss appropriate options. These might include lifestyle support through NHS weight management programmes, dietary advice, increased physical activity, or—depending on your BMI and health conditions—referral to specialist weight management services. The NHS recommends losing weight gradually at a rate of 0.5 to 1 kg per week for sustainable results. Track your progress using our free progress tracker, and remember that even a 5–10% reduction in body weight can bring meaningful health benefits including improved blood pressure, better blood sugar control, and reduced joint strain.
- 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 90 kg overweight or obese?
It depends on your height. At 90kg, your BMI could fall into either the overweight or obese category depending on how tall you are. For example, at 1.75m (5ft 9in), 90kg gives a BMI of 29.4 (overweight), but at 1.68m (5ft 6in), it gives a BMI of 31.9 (obese). Use our BMI calculator to find your exact category.
What is the healthy weight range for someone who is 90 kg?
Healthy weight ranges vary by height. If you currently weigh 90 kg and want to reach a healthy BMI (18.5–24.9), your goal weight depends on your height. For example, at 1.75m, the healthy range is 56–76 kg. Your GP can advise on a realistic and sustainable weight loss target for your individual circumstances.
How do I convert 90 kg to stone and pounds?
90 kg equals 14 stone and 3 pounds (14st 3lbs). The formula is: kilograms ÷ 6.35029 = stone. Alternatively, use our free weight converter on this page to instantly convert between kg, stone, and pounds for any weight.
What does the NHS say about weight management at 90 kg?
The NHS recommends speaking with your GP if you're concerned about your weight. If your BMI is above the healthy range, your GP may suggest lifestyle changes, refer you to an NHS weight management programme, or—if appropriate—discuss weight management options. The NHS emphasises sustainable, gradual weight loss of 0.5–1 kg per week alongside diet and activity changes.
Can I use the NHS health guide if I weigh 90 kg?
Yes. NHS guidance applies to all adults regardless of weight. The NHS provides resources on healthy eating, physical activity, and weight management. Use our free BMI calculator to check your personal BMI, then discuss the results with your GP for personalised advice on UK health guidance and support options suitable for you. --- ```
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.