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
89kg Into Stone — Is This Weight Healthy?
89kg converts to 12 stone and 7 pounds. Whether this is a healthy weight depends entirely on your height. For some adults, 89kg falls within a healthy range; for others, it may indicate overweight or obesity according to NHS guidelines. Use our free BMI calculator above to check your personal BMI instantly — this will tell you exactly where your weight sits relative to NHS healthy weight ranges. Your height makes all the difference.
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 89kg Compares to Healthy Weight Ranges
89kg is considered healthy or overweight depending on your height. The NHS defines a healthy weight as a BMI between 18.5 and 24.9. Here's how 89kg compares at different heights:
- At 5ft 6in (168cm): 89kg gives a BMI of 31.6 — this falls in the obese category (Class I)
- At 5ft 10in (178cm): 89kg gives a BMI of 27.8 — this falls in the overweight category
- At 6ft 1in (185cm): 89kg gives a BMI of 24.1 — this falls within the healthy weight range
For someone 5ft 10in tall, the healthy weight range is approximately 61kg to 79kg (9st 8lbs to 12st 6lbs). At 89kg, this person would be above the healthy range. Convert kilograms to stone easily using our weight converter on this page to see your exact measurements.
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.
What to Do If You're Outside the Healthy Range
If your weight falls outside the NHS healthy range, the first step is to speak with your GP. They can assess your individual health, check your waist measurement, and discuss any weight-related health conditions. A waist circumference over 94cm (37 inches) for men or 80cm (31.5 inches) for women indicates increased health risk, even within certain BMI ranges.
The NHS recommends sustainable weight loss of 0.5 to 1kg per week through a balanced diet and increased physical activity. You can track your progress using our free progress tracker. Remember that weight is just one measure of health — your GP can provide personalised guidance based on your complete health picture, family history, and any existing conditions.
- 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.
What is 89kg in stone and pounds?
89kg converts to 12 stone and 7 pounds (12st 7lbs). To convert kilograms to stone, divide the kilogram amount by 6.35029. Our free weight converter above makes this instant and accurate for any weight.
Is 89kg a healthy weight?
It depends on your height. At 5ft 10in, 89kg is overweight (BMI 27.8). At 6ft 1in, it's healthy (BMI 24.1). Use our free BMI calculator to check your exact category based on your height.
What's the healthy weight range for someone 5ft 10in?
For someone 5ft 10in (178cm) tall, NHS healthy weight is approximately 61kg to 79kg (9st 8lbs to 12st 6lbs). This is based on a BMI of 18.5 to 24.9.
How much weight would I need to lose to be in the healthy range?
If you're 5ft 10in and weigh 89kg, you'd need to lose approximately 10kg (1st 8lbs) to reach the upper boundary of the healthy range at 79kg. Your GP can discuss realistic, sustainable weight loss targets for you.
Does waist measurement matter if my BMI is borderline?
Yes. The NHS recommends measuring waist circumference alongside BMI. For men, over 94cm indicates increased health risk; over 102cm is high risk. For women, over 80cm is increased risk; over 88cm is high risk. Your GP can advise on your individual risk profile.
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.