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 and BMI?
135 kilograms is equivalent to 21 stone 4 pounds (21st 4lbs). However, your BMI at this weight depends entirely on your height. Using the standard kilogram to stone conversion, 135 kg falls into different NHS health categories depending on how tall you are. Use our free BMI calculator above to find your exact BMI, or check the example heights below to see where you stand on the health scale.
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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.
135 kg BMI at Different Heights
Your BMI depends on both weight and height. At 135 kg, here's what your BMI would be at common adult heights:
- 160 cm (5ft 3in): BMI 52.7 — Severely obese (Class III)
- 165 cm (5ft 5in): BMI 49.4 — Severely obese (Class III)
- 170 cm (5ft 7in): BMI 46.0 — Severely obese (Class III)
- 175 cm (5ft 9in): BMI 44.1 — Severely obese (Class III)
- 180 cm (5ft 11in): BMI 41.6 — Obese (Class II)
- 185 cm (6ft 1in): BMI 39.5 — Obese (Class II)
To convert 135 kg to stone and pounds precisely, divide 135 by 6.35029, which gives 21.26 stone. The weight in stone and pounds format is 21 stone 4 pounds. Your GP can provide personalised advice about what your BMI means for your individual health.
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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 NHS BMI Categories
The NHS uses standard BMI ranges to assess health risk. A healthy BMI is between 18.5 and 24.9. At 135 kg, most heights place you in the obese or severely obese category (BMI 30 and above), which increases risk of type 2 diabetes, heart disease, and other weight-related health conditions.
Important: BMI does not account for muscle mass, bone density, or where fat is stored. Even if your BMI is high, losing even 5–10% of your body weight can significantly improve blood pressure, blood sugar, and cholesterol. Your GP can discuss personalised weight management options, including lifestyle changes or, where appropriate, prescription support.
- 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 135 kg in stone and pounds?
135 kg equals 21 stone 4 pounds (21st 4lbs). To convert kilograms to stone, divide the kilogram amount by 6.35. You can also use our free weight converter above to switch between metric and imperial measurements instantly for any weight.
Is 135 kg overweight?
At 135 kg, your health status depends on your height and BMI. For most adults, 135 kg falls into the obese or severely obese category. Use our free BMI calculator to find your personal BMI, which gives a more accurate picture than weight alone.
What BMI is 135 kg?
BMI at 135 kg ranges from about 39.5 to 52.7 depending on height. A person 180 cm (5ft 11in) tall would have a BMI of approximately 41.6, whilst someone 160 cm (5ft 3in) would have a BMI of around 52.7. Calculate your exact BMI using the calculator on this page.
What is the healthy weight for someone 175 cm tall?
For someone 175 cm tall, the healthy weight range (BMI 18.5–24.9) is approximately 56–76 kg (8st 12lbs to 12st). At 135 kg, a person this height would have a BMI of 44.1, which is in the obese category. Your GP can discuss safe, sustainable weight loss options.
Can I lose weight at 135 kg?
Yes. The NHS recommends losing 0.5–1 kg per week through a combination of reduced-calorie diet and increased physical activity. For some people, prescription weight management support may be appropriate—discuss options with your GP. Track your progress using our free progress tracker tool.
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.