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 is 35kg in Stones and Pounds?
35kg converts to 5 stones and 8.8 pounds (or 5st 8.8lbs) in UK measurements. However, whether this weight is healthy for you depends entirely on your height. The same weight can give very different BMI results depending on how tall you are. Use our free BMI calculator above to check what your personal BMI is, and see where it falls according to NHS guidelines. This will help you understand what 35kg means for your individual health.
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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.
35kg BMI at Different Heights
At 35kg, your BMI varies significantly based on your height. Here are example BMI values across common UK heights:
- 150cm (4ft 11in): BMI of 15.6 — healthy weight range (NHS category)
- 155cm (5ft 1in): BMI of 14.6 — healthy weight range
- 160cm (5ft 3in): BMI of 13.7 — underweight (below 18.5)
- 165cm (5ft 5in): BMI of 12.9 — underweight
- 170cm (5ft 7in): BMI of 12.1 — underweight
- 175cm (5ft 9in): BMI of 11.4 — underweight
If you're taller, your BMI at 35kg will be lower. If you're shorter, it may be higher. Calculate your exact BMI using the metric to imperial weight converter and BMI calculator on this page by entering your actual height.
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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 BMI to screen for weight-related health risks. A healthy BMI falls between 18.5 and 24.9. At 35kg, many adults would be in the underweight category (BMI below 18.5), which can carry health risks including weakened bones, reduced immune function, and nutritional deficiencies.
However, BMI has important limitations — it doesn't distinguish between muscle and fat, and it doesn't account for where weight is distributed on your body. If you have concerns about whether your weight is healthy for you, your GP can provide personalised advice based on your overall health, medical history, and other factors beyond 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 35kg to stones and pounds?
Divide 35kg by 6.35029 to get 5.51 stone, which equals 5 stones and 8.8 pounds (5st 8.8lbs). Use our free weight converter on this page to convert between kg, stone, and pounds instantly.
Is 35kg a healthy weight?
At 35kg, most UK adults would have a BMI in the underweight range, which can indicate health risks. However, your personal weight status depends on your height, age, and overall health. Use our BMI calculator above to find your exact BMI, then discuss the results with your GP if you have concerns.
What does BMI mean and why does it matter?
BMI (Body Mass Index) is a screening tool that estimates whether your weight falls within a healthy range for your height. The NHS uses BMI to identify potential weight-related health risks. A BMI below 18.5 is classified as underweight, which may indicate insufficient nutrition or underlying health issues.
Can I convert kilograms to stone without a calculator?
Yes, you can use the formula: kg ÷ 6.35 = stone. For 35kg: 35 ÷ 6.35 = 5.51 stone. However, our free weight converter on this page does this instantly and gives you the exact stone and pounds breakdown.
Are there different BMI categories for different ethnicities?
Yes. The NHS recommends lower BMI thresholds for adults of South Asian, Chinese, Black African, and Black Caribbean heritage because these groups face higher health risks at lower BMI levels. Speak to your GP about what the right weight range is for your specific background and health situation.
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.