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 26 Kilos in Stones? BMI & Weight Context
26 kilograms is equivalent to 4 stone and 1 pound in UK measurements. However, your BMI—the key health indicator—depends entirely on your height. At different heights, this weight produces very different BMI results, ranging from underweight to overweight according to NHS guidelines. Use our free BMI calculator above to find your exact BMI and where it falls on the health spectrum.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
26kg BMI at Different Heights
To understand what 26kg means for your health, you need to calculate your BMI using both weight and height. Here are example BMI values at common heights for someone weighing 26kg:
- At 150cm (4ft 11in): BMI of 11.6 — underweight (below healthy range)
- At 160cm (5ft 3in): BMI of 10.2 — underweight
- At 170cm (5ft 7in): BMI of 9.0 — underweight
- At 180cm (5ft 11in): BMI of 8.0 — underweight
- At 190cm (6ft 3in): BMI of 7.2 — underweight
These BMI values show that 26kg is a very low weight across all adult heights, falling significantly below the healthy range. Calculate your personal BMI using the calculator on this page by entering your exact height to get your precise figure. The standard kg to stone conversion is straightforward: divide kilograms by 6.35 to get stone.
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.
Understanding BMI Categories & Limitations
NHS BMI categories are: underweight (below 18.5), healthy weight (18.5–24.9), overweight (25.0–29.9), and obese (30.0+). At 26kg, your BMI would be underweight regardless of adult height, which may indicate the need for a medical consultation. BMI has important limitations—it does not account for muscle mass, bone density, or where fat is stored. Our free weight converter above can help you convert 26kg to other units like stones and pounds. If you have concerns about being significantly underweight, speak with your GP who can assess your individual health and nutritional needs.
- 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 26kg in stone exactly?
26 kilograms equals 4 stone and 1 pound (4st 1lb). To convert kilograms to stone, divide 26 by 6.35029. This is 26kg expressed in traditional UK weight measurements used for body weight.
What BMI does 26kg give me?
Your BMI depends on your height. At 160cm, BMI is 10.2 (underweight). At 180cm, BMI is 8.0 (underweight). Use our BMI calculator above and enter your exact height to get your personal BMI figure and NHS category.
Is 26kg underweight?
Yes, 26kg is significantly underweight for any adult height according to NHS guidelines. A healthy weight range is typically 45–75kg depending on height. If you weigh 26kg, speak with your GP about your health and nutritional status.
How do I convert 26kg to stones and pounds?
26kg converts to 4 stone 1 pound. Use our weight converter tool above to instantly switch between kg, stone, and lbs. The formula is: kg ÷ 6.35029 = stone. You can also check your healthy weight range using our BMI calculator.
Why does BMI matter at 26kg?
BMI helps identify if your weight is healthy for your height. At 26kg, a very low BMI suggests being significantly underweight, which can affect health. NHS guidelines recommend consulting your GP if your BMI is outside the healthy range to discuss any underlying health factors.
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.