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 BMI Does 10.8 kg Give You?
10.8 kg converts to approximately 23.8 pounds. However, BMI depends on your height — the same weight produces very different BMI values depending on how tall you are. This guide shows what BMI 10.8 kg gives at typical adult heights, and which NHS health categories each falls into. Use our free BMI calculator above to find your exact personal BMI, or the weight converter to switch between kg to stone and other metric to imperial weight measurements.
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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.
10.8 kg BMI at Different Heights
10.8 kg is an extremely low body weight for adults and would only be realistic for very young children. BMI calculations are meaningless at this weight for adults, but here's how it would convert at various adult heights for reference:
- At 160 cm (5ft 3in): BMI 42.2 — severely obese (NHS category) — not realistic at this weight
- At 170 cm (5ft 7in): BMI 37.3 — obese class II
- At 180 cm (5ft 11in): BMI 33.3 — obese class I
- At 190 cm (6ft 3in): BMI 29.9 — overweight
For children, BMI is calculated differently using age and sex-specific centile charts, not adult categories. If you're looking at a weight this low for an adult, please speak with your GP for personalised health guidance.
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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.
Understanding BMI Categories and Limitations
The NHS uses these standard BMI categories for adults: healthy weight is 18.5–24.9, overweight is 25.0–29.9, obese class I is 30.0–34.9, and severely obese is 40.0 or above. However, BMI has important limitations. It doesn't account for muscle mass, bone density, or where fat is stored on your body. Waist circumference and overall health markers matter too. For South Asian, Chinese, Black African, or Black Caribbean adults, the NHS recommends lower BMI thresholds due to higher health risk at equivalent weights. Always discuss your personal weight and health with your GP rather than relying on BMI alone.
- 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.
How do I convert 10.8 kg to pounds exactly?
10.8 kg multiplied by 2.20462 equals approximately 23.81 pounds. You can use our free weight converter on this page to switch between kg, pounds, and stone instantly for any weight.
What does 10.8 kg equal in stone and pounds?
10.8 kg equals approximately 1 stone and 9.8 pounds. UK adults often use stone and pounds rather than kilograms, so the weight converter is useful for understanding UK measurements.
Is 10.8 kg a healthy weight for an adult?
No — 10.8 kg is far too low for any adult. This weight would indicate severe malnutrition or a serious health condition. If you or someone you know weighs this little, please contact your GP urgently.
Why does BMI change with height?
BMI divides weight by height squared, so the same weight produces very different BMI values depending on how tall you are. Taller people have lower BMI at the same weight. Use our free BMI calculator to find your personal BMI based on both your weight and height.
Do BMI categories apply to children?
No — children use age and sex-specific BMI centile charts, not adult categories. For children's weight assessment, speak with your GP or health visitor, or use the NHS Healthy Weight Calculator for children.
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.