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
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35 Kg in Stone — BMI and Health Context
35 kg is equivalent to 5 stone and 5.4 pounds in UK measurements. However, whether this weight is healthy depends entirely on your height. The same weight gives a very different BMI for a 1.60m (5ft 3in) person compared to a 1.80m (5ft 11in) person. Use our free BMI calculator above to find your personal BMI instantly, or see the example BMI values below for different heights at 35 kg.
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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.
BMI at 35 kg — Examples Across Different Heights
At 35 kg, your BMI depends on your height. Here are example BMI values at common heights using the standard kg to stone conversion and BMI formula:
- 1.50m (4ft 11in): BMI 15.6 — Underweight (NHS healthy range starts at 18.5)
- 1.60m (5ft 3in): BMI 13.7 — Underweight
- 1.70m (5ft 7in): BMI 12.1 — Underweight
- 1.80m (5ft 11in): BMI 10.8 — Underweight
At 35 kg, all adults fall into the underweight category regardless of height. The NHS defines underweight as a BMI below 18.5. An underweight BMI can indicate malnutrition, low muscle mass, or underlying health conditions. If you are at 35 kg and concerned about your weight, speak to your GP for personalised advice.
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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 and Weight Context
The NHS uses BMI as a screening tool for weight-related health risks. A BMI below 18.5 is classified as underweight, while the healthy weight range is 18.5 to 24.9. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds apply due to higher cardiovascular risk at lower weights.
BMI has limitations — it does not distinguish between muscle and fat, and does not account for age or body composition. Our free weight converter helps you understand your weight across different units, and speaking with your GP provides personalised health guidance for your individual circumstances.
- 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 35 kg a healthy weight?
At 35 kg, BMI falls in the underweight category for all adults (BMI below 18.5). Whether this is healthy depends on individual factors including age, muscle mass, and medical history. Your GP can assess your specific health and advise if weight gain or investigation is needed.
What does 35 kg equal in stone and pounds?
35 kg equals 5 stone and 5.4 pounds exactly. To convert kilograms to stone, divide by 6.35. You can also use our free weight converter above to switch between kg, stone, and pounds instantly.
Is 35 kg underweight?
Yes, 35 kg is classified as underweight by the NHS (BMI below 18.5) regardless of height. Underweight can be associated with malnutrition, weak immune function, and bone density loss. If you are underweight, consult your GP for health advice.
What is the healthy weight range at 1.70m (5ft 7in)?
At 1.70m, the healthy BMI range (18.5–24.9) corresponds to approximately 53.5 kg to 72 kg (8st 5lbs to 11st 4lbs). At 35 kg, you are significantly below the healthy weight range. Use our BMI calculator to check your healthy weight range for your specific height.
How do I convert 35 kg to stone?
Divide 35 kg by 6.35 to get 5.51 stone, which is 5 stone and 7.1 pounds (or approximately 5 stone 5.4 lbs). Our weight converter tool above calculates this instantly and accurately for any weight.
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.