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
6.8 Lbs in Kg — What's Your BMI?
6.8 pounds converts to approximately 3.08 kilograms. On its own, this weight doesn't tell you much about health — BMI depends entirely on your height. A person weighing 3.08 kg would only be a newborn baby, so this conversion is most useful when considering it as part of a larger weight or when understanding weight loss in smaller increments. Use our free BMI calculator above to check what your current weight means for your health at your specific height, and our weight converter to switch between stone, pounds, and kilograms instantly.
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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.
Understanding Weight in Different Measurements
6.8 lbs = 3.08 kg exactly. This small weight amount is typically seen when tracking weight loss progress rather than total body weight. If you're monitoring your weight loss journey, even small decrements like this matter — losing 3 kg over a month alongside a reduced-calorie diet and increased physical activity represents meaningful progress.
For context, when converting between metric and imperial weight, remember: 1 kg = 2.20462 pounds, and 1 stone = 6.35 kg. To convert kilograms to stone, divide by 6.35. Many UK adults think in stone and pounds for body weight, so understanding kg to stone conversions helps you track progress in whichever unit feels natural. Our weight converter lets you switch between kg, stone, and lbs instantly.
- 6.8 lbs = 3.08 kg
- 6.8 lbs = 0.486 stone (approximately 7 oz)
- Useful for tracking small weight changes over weeks or months
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.
BMI Categories and NHS Guidance
On its own, 6.8 kg isn't enough to calculate a meaningful BMI for an adult — BMI requires both weight and height. The NHS defines healthy weight using BMI ranges: 18.5 to 24.9 is healthy, 25 to 29.9 is overweight, and 30 and above is obese. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower thresholds apply because these groups face higher health risks at lower BMI levels.
BMI has limitations — it doesn't distinguish between muscle and fat, so athletes may have a high BMI but low body fat. Waist circumference matters too: over 94 cm for men or 80 cm for women indicates increased health risk. Use our free BMI calculator to find your personal BMI and NHS category based on your height and weight.
- 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 6.8 lbs to kg?
Multiply 6.8 by 0.453592 (the exact conversion factor). This gives 3.08 kg. Alternatively, divide 6.8 by 2.20462. Our free weight converter above does this instantly — just enter any weight and switch between units.
Is 6.8 lbs a significant weight loss?
Yes — losing 3.08 kg (6.8 lbs) is meaningful progress. The NHS recommends losing 0.5 to 1 kg per week for sustainable results, so 3.08 kg represents about 3 to 6 weeks of steady weight loss. Track progress with our free progress tracker.
What's my BMI if I weigh 6.8 lbs?
You can't calculate an adult BMI from just 6.8 lbs alone — BMI requires both weight and height. If you meant you've lost 6.8 lbs, calculate your BMI using your current total weight and height in our free BMI calculator above.
How do I convert stones and pounds to kilograms?
Use this formula: (stone × 6.35029) + (pounds × 0.453592) = kg. For example, 10 stone 7 pounds = (10 × 6.35) + (7 × 0.453592) = 66.8 kg. Our weight converter does this automatically.
What do NHS BMI categories mean?
NHS categories are: under 18.5 = underweight, 18.5–24.9 = healthy, 25–29.9 = overweight, 30–34.9 = obese (Class I), 35–39.9 = obese (Class II), 40+ = severely obese (Class III). South Asian and Black African adults have lower thresholds. See your GP for personalised health advice.
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.