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
Is 189 Pounds (85.7 kg) a Healthy Weight?
189 pounds converts to approximately 85.7 kilograms. Whether this is a healthy weight depends entirely on your height — the same weight can be healthy for one person and overweight for another. The NHS uses BMI (Body Mass Index) to assess weight health, which compares your weight to your height. Use our free BMI calculator above to check your personal BMI instantly, or read on to explore healthy weight ranges at different heights and understand what the NHS guidelines mean for you.
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.
Healthy Weight Ranges at Different Heights
At 189 pounds (85.7 kg), whether you're in a healthy weight range depends on your height. Here's how this weight sits across common UK heights:
- 5ft 6in (168 cm): BMI approximately 27.6 — overweight range. Healthy range for this height: 47–63 kg (104–139 lbs)
- 5ft 9in (175 cm): BMI approximately 25.3 — overweight range. Healthy range for this height: 55–74 kg (121–163 lbs)
- 5ft 11in (180 cm): BMI approximately 23.8 — healthy weight range. Healthy range for this height: 60–81 kg (132–178 lbs)
These ranges use the NHS standard healthy BMI range of 18.5 to 24.9. Convert your weight between kg, stone, and pounds instantly using the free weight converter on this page to find your exact metric.
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 Guidance and What to Do Next
The NHS recommends healthy weight as a BMI between 18.5 and 24.9, though ethnicity-adjusted thresholds apply for South Asian, Chinese, Black African, and Black Caribbean adults (healthy BMI 18.5–22.9). Beyond BMI, waist measurement also matters — the NHS recommends waist circumference under 94 cm (37 inches) for men and under 80 cm (31.5 inches) for women as a sign of good health. If you're outside your healthy weight range, your GP can discuss safe, sustainable approaches to weight management tailored to your individual health. Even a modest 5–clinically studied weight loss can bring meaningful health benefits.
- 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 189 pounds in kilograms?
189 pounds equals approximately 85.7 kilograms. To convert, divide pounds by 2.20462. This conversion is exact and works for any weight — use our free weight converter tool for instant conversions between kg, stone, and pounds.
Is 189 pounds overweight?
It depends on your height. At 5ft 6in, 189 pounds is overweight (BMI 27.6). At 5ft 11in, it falls in the healthy range (BMI 23.8). Use our free BMI calculator above to check your personal BMI based on your exact height and weight.
What's the healthy weight range for my height?
The NHS defines healthy weight as BMI 18.5–24.9. To find your healthy range, multiply your height in metres squared by 18.5 (lower limit) and 24.9 (upper limit). For example, at 5ft 9in, healthy weight is 55–74 kg (121–163 lbs). Your GP can also provide personalised guidance.
Why does height matter for weight health?
BMI accounts for the relationship between weight and height — taller people naturally weigh more. Two people weighing 189 pounds can have very different BMI values depending on their height. This is why the same weight is healthy for one person but overweight for another.
What should I do if I'm outside the healthy weight range?
If your weight is outside the NHS healthy range, discuss options with your GP. Safe weight loss is typically 0.5–1 kg per week. Your GP can advise on sustainable approaches — diet, exercise, behaviour change, or specialist services — tailored to your health and circumstances.
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.