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 135 kg in stone?
135 kg is equal to 21 stone and 4 pounds (21st 4lbs). This weight conversion uses the standard UK measurements that most British adults use daily. Whether you're checking your own weight, comparing health metrics, or using NHS guidelines, understanding your weight in stone makes it easier to track your health progress. You can use our free weight converter to switch between kilograms, stone, and pounds instantly, and our BMI calculator to see how this weight relates to your personal health profile at your height.
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.
135 kg to stone conversion table and formula
To convert 135 kg to stone, we divide by 6.35029 — the standard kilogram to stone conversion factor. The formula is straightforward: kg ÷ 6.35029 = stone. For 135 kg, this gives us 21.27 stone, which breaks down to 21 stone and 4 pounds. Below is a reference table showing how similar weights convert, helping you understand the kg to stone conversion across a range of values. This table is useful whether you're tracking weight in kilograms or need to understand stone and pounds measurements for NHS health appointments or personal fitness goals.
- 130 kg = 20st 7lbs
- 132 kg = 20st 11lbs
- 133 kg = 20st 13lbs
- 134 kg = 21st 1lb
- 135 kg = 21st 4lbs
- 136 kg = 21st 6lbs
- 137 kg = 21st 8lbs
- 138 kg = 21st 11lbs
- 140 kg = 22st 0lbs
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 and healthy weight context at 135 kg
At 135 kg, your BMI depends on your height. For example, at an average UK adult height of 170 cm (5ft 7in), 135 kg gives a BMI of approximately 47.4, which falls into the severely obese category (BMI 40+). At taller heights like 180 cm (5ft 11in), the BMI would be around 41.7. The NHS recommends a healthy BMI between 18.5 and 24.9 for most adults. Our free BMI calculator on this page can show your exact BMI instantly when you enter your height and weight. If you're concerned about your weight and health, your GP can provide personalised advice and discuss whether weight management support might be appropriate for you.
- 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 135 kg to stone manually?
Divide 135 by 6.35029. The result is 21.27 stone. To convert the decimal to pounds, multiply 0.27 by 14 (since 1 stone = 14 pounds), giving 3.78 pounds. This rounds to 21 stone and 4 pounds, or 21st 4lbs in UK notation.
Is 135 kg considered overweight in the UK?
At 135 kg, your BMI is above 30 (the threshold for obesity) at all typical adult heights. The NHS categorises this as obese or severely obese depending on height. Your GP can discuss your individual health and whether weight management support might be helpful.
What's the healthy weight range for someone at 135 kg?
A healthy BMI of 18.5–24.9 means most adults should aim for much lower weights. For example, at 170 cm height, a healthy weight range is roughly 53–72 kg. Your GP or a registered dietitian can discuss realistic and sustainable weight loss goals personalised to your health profile.
Can I lose weight safely from 135 kg?
Yes. The NHS recommends losing weight gradually at a rate of 0.5–1 kg per week through a combination of dietary changes and increased physical activity. Your GP can discuss weight management options, including lifestyle support, behaviour change programmes, and in some cases, prescription weight loss medication.
How does 135 kg compare to average UK adult weight?
The average UK adult weighs approximately 80–85 kg. At 135 kg, you're significantly above average. However, weight alone doesn't determine health — your GP will consider your overall health profile, including blood pressure, blood sugar, and other factors, when assessing your risk.
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.