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 Do 7.6 Pounds Give You?
7.6 pounds equals 3.45 kg. However, BMI depends entirely on your height — the same weight gives very different BMI values for different people. This guide shows you what BMI 3.45 kg would give at common UK heights, then explains what those NHS categories mean for your health. Use our free BMI calculator above to find your exact personal BMI instantly, or continue reading to understand how this weight sits in the healthy weight context for adults in the UK.
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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.
BMI at Different Heights for 3.45 kg (7.6 lbs)
At 3.45 kg, your BMI varies dramatically depending on height. Here are examples using common UK heights:
- At 150 cm (4ft 11in): BMI = 15.3 (healthy weight)
- At 160 cm (5ft 3in): BMI = 13.5 (underweight)
- At 170 cm (5ft 7in): BMI = 11.9 (underweight)
- At 180 cm (5ft 11in): BMI = 10.6 (underweight)
- At 190 cm (6ft 3in): BMI = 9.5 (underweight)
This very low weight represents less than 8 lbs and is not typical for adult nutrition discussions. If you're tracking weight loss or managing your health, use our free weight converter above to check your actual weight in stone and pounds, then calculate your BMI with the BMI calculator on this page for your specific height.
Clinically BackedWeight Loss
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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.
NHS BMI Categories & What They Mean
The NHS uses standardised BMI ranges to assess weight health:
- Underweight (below 18.5): May indicate insufficient nutrition or underlying health issues
- Healthy weight (18.5–24.9): Optimal range for most adults
- Overweight (25–29.9): Increased health risks develop
- Obese (30+): Significantly elevated risk of diabetes, heart disease, and other conditions
For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower BMI thresholds due to higher cardiovascular and diabetes risk. BMI is useful but has limitations — it doesn't distinguish muscle from fat. Your GP can provide personalised guidance on whether your weight is healthy for you.
- 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 7.6 pounds in kilograms exactly?
7.6 pounds equals 3.45 kilograms. To convert pounds to kg, multiply by 0.453592. This is a very light weight — most UK adults weigh significantly more. If you're tracking your weight, use the weight converter on this page to check your total body weight in both metric and imperial units.
Is 3.45 kg a healthy weight for an adult?
No, 3.45 kg (7.6 lbs) is far too light for any adult. A healthy adult weight range is typically 50–100+ kg depending on height. If this is your actual body weight, please contact your GP urgently. If you meant to check a different weight, use our free weight converter to find the correct kilogram value.
What BMI should I aim for according to the NHS?
The NHS recommends a healthy BMI of 18.5 to 24.9 for most adults. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, 18.5 to 22.9 is recommended due to higher health risks at higher BMI levels. Your GP can advise what target weight is right for your individual health.
How do I calculate my own BMI?
Use our free BMI calculator on this page — simply enter your weight in kg (or stone and pounds) and your height in cm (or feet and inches). The calculator shows your BMI instantly and tells you which NHS category it falls into. This is much easier than a UK pharmacy calculation.
Can I convert between stone and kg using a simple formula?
Yes. To convert kg to stone, divide by 6.35029. To convert stone to kg, multiply by 6.35029. Our weight converter on this page does this instantly for any weight. UK measurements use stone and pounds, while the NHS uses kilograms — our converter handles both seamlessly.
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.