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 89kg in Stone and Pounds?
89kg is equal to 14 stone and 0.5 pounds (or approximately 14 stone). This is a common adult weight in the UK and falls into the overweight or obese category depending on your height. To understand what 89kg means for your personal health, you'll want to consider your height alongside this weight — this is where BMI becomes useful. Our free BMI calculator above can show you instantly where you fall on the NHS health guidance scale, helping you understand if 89kg is a healthy weight for your specific measurements.
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 Does 89kg Compare to NHS Weight Guidance?
At 89kg, whether you're in a healthy weight range depends entirely on your height. Using the NHS BMI categories, a 89kg adult would be:
- At 1.70m tall (5ft 7in): BMI of 30.8 — falls into the Obese Class I category
- At 1.80m tall (5ft 11in): BMI of 27.5 — falls into the Overweight category
- At 1.90m tall (6ft 3in): BMI of 24.6 — falls into the Healthy Weight category
The NHS recommends a healthy BMI of 18.5 to 24.9 for most UK adults. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the lower threshold is 18.5 to 22.9. Use our free weight converter and BMI calculator above to check your personal context, and discuss any health concerns with your GP.
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.
Taking Action: Next Steps for UK Health Guidance
If you're at 89kg and concerned about your weight, the NHS recommends starting with lifestyle changes: a balanced diet with a calorie deficit of around 500 kcal per day can support a sustainable loss of 0.5 to 1kg per week. Even losing just 5% of your body weight can bring meaningful health benefits. If you have weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea, speak to your GP about support options — these may include NHS weight management services or prescription treatments. Track your progress using our free progress tracker, and remember that sustainable weight management combines diet, physical activity, and professional support.
- 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 89kg a healthy weight for me?
This depends on your height. Use our free BMI calculator above with your specific measurements. At 1.70m, 89kg is overweight; at 1.90m, it's healthy. Your GP can also assess your personal health context, including weight-related conditions and family history.
What does 89kg equal in pounds and stone?
89kg equals 14 stone and 0.5 pounds (or approximately 196 lbs). Use our free weight converter above to convert between kg, stone, and pounds instantly for any weight.
How much weight would I need to lose to reach a healthy BMI?
This varies by your height and target BMI. For example, if you're 1.75m tall, you'd aim for around 75kg to reach the top of the healthy BMI range. Use our GLP-1 weight loss calculator above to explore realistic targets, or discuss goals with your GP.
Can I access NHS weight management support at 89kg?
Possibly. The NHS supports adults with a BMI of 30 or above, or 27+ with weight-related health conditions. At 89kg, your eligibility depends on your height and whether you have conditions like diabetes or high blood pressure. Ask your GP about tier 3 weight management services in your area.
What's a safe rate of weight loss from 89kg?
The NHS recommends losing 0.5 to 1kg per week for sustainable results. This typically requires a calorie deficit of around 500 kcal per day, combined with physical activity. Faster loss is possible with medical support but should be discussed with your GP to avoid muscle loss.
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.