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 Kg To Pounds — Healthy Weight Guide
6.8 kilograms is equal to approximately 15 pounds. Whether this weight is healthy for you depends entirely on your height and age. This is a relatively light weight that falls into the healthy range for shorter adults or children, but you'll need to know your height to determine your personal healthy weight range. Use our free BMI calculator above to check where your weight sits according to NHS guidelines, or continue reading to understand healthy weight ranges across different heights.
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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.
Healthy Weight Ranges By Height
At 6.8 kg (15 lbs), whether you're at a healthy weight depends on your height. Here are three real-world examples showing how the same weight can be healthy or underweight depending on stature:
- At 150 cm (4ft 11in): 6.8 kg would give a BMI of 3, which is dangerously underweight — this weight would only be appropriate for an infant or very young child, not an adult
- For an infant at 6 months: 6.8 kg is a typical healthy weight range according to NHS child growth charts
- At 160 cm (5ft 3in): A weight of 60 kg (not 6.8 kg) would give a BMI of 23.4, which falls comfortably in the healthy range
To convert kilograms to pounds for any weight, multiply by 2.2. For proper context, use our weight converter above to check both metric and imperial measurements, then cross-reference with the BMI calculator to see your personal healthy weight range.
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 On Healthy Weight
According to NHS guidelines, a healthy BMI for most UK adults is between 18.5 and 24.9. However, for adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds (18.5 to 22.9) due to higher health risks at the same BMI. Waist circumference also matters — men should aim for under 94 cm (37 inches), and women under 80 cm (31.5 inches). If your weight falls outside the healthy range for your height, your GP can discuss sustainable approaches to weight management, including diet, physical activity, and support services. Remember that healthy weight is just one part of overall health.
- 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.
Is 6.8 kg a healthy weight for an adult?
No, 6.8 kg is dangerously underweight for any adult, regardless of height. This weight is only appropriate for infants and young children. If you're an adult weighing 6.8 kg, please contact your GP immediately. Use our BMI calculator to check your healthy weight range.
How do I convert 6.8 kg to pounds?
Multiply 6.8 by 2.20462. This gives approximately 15 pounds. Use our weight converter above for instant conversions between kilograms, pounds, and stone — the metric to imperial weight conversion is quick and accurate.
What's my healthy weight range if I'm 160 cm tall?
At 160 cm, a healthy weight range is approximately 47–64 kg (7st 6lbs to 10st 1lb) based on a BMI of 18.5 to 24.9. Use our BMI calculator to find your exact healthy range and track your progress with our free progress tracker.
Does my height really affect whether a weight is healthy?
Yes, absolutely. Height is crucial for determining healthy weight. The same weight can be healthy for one person and underweight for another depending on how tall they are. This is why BMI uses both weight and height. Our BMI calculator factors in both measurements instantly.
What should I do if my weight is outside the healthy range?
Talk to your GP, who can assess your individual health and discuss options like dietary support, physical activity programmes, or specialist weight management services. The NHS offers free tier 1 and 2 weight management support through your local practice. Avoid crash diets — sustainable change works best.
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.