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 61kg in Pounds and What's Your BMI?
61 kilograms equals 134.5 pounds in weight. However, your BMI — which measures whether you're at a healthy weight — depends on your height, not just your weight in pounds. At 61kg, your BMI can range from underweight to overweight depending on how tall you are. Use our free BMI calculator above to find your exact BMI instantly, then check where you fall on the NHS healthy weight scale. Understanding both your weight and BMI helps you make informed health decisions.
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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.
61kg BMI at Different Heights
To convert 61kg to stone and pounds, divide by 6.35: that's approximately 9 stone 8 pounds (9st 8lbs). Here's what your BMI would be at different heights using the standard kg to stone conversion framework:
- At 155cm (5ft 1in): BMI = 25.4 (overweight range)
- At 160cm (5ft 3in): BMI = 23.8 (healthy weight)
- At 165cm (5ft 5in): BMI = 22.4 (healthy weight)
- At 170cm (5ft 7in): BMI = 21.1 (healthy weight)
- At 175cm (5ft 9in): BMI = 19.9 (healthy weight)
- At 180cm (5ft 11in): BMI = 18.8 (healthy weight)
Try our free weight converter to switch between kilos in stone, pounds, and kilograms instantly. Your height makes all the difference — even a small change in height significantly affects your BMI category.
Clinically BackedWeight Loss
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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 classifies BMI into clear health categories. At 61kg, whether you're healthy depends entirely on your height. A BMI under 18.5 is underweight, 18.5–24.9 is healthy weight, 25–29.9 is overweight, and 30+ is obese. For adults of South Asian, Chinese, Black African, or Black Caribbean heritage, the NHS recommends lower thresholds — healthy weight is 18.5–22.9. Remember: BMI doesn't account for muscle mass or where fat is stored, so it's a screening tool, not the full picture. Your GP can discuss what 61kg means for your personal health based on your overall fitness, age, and medical history.
- 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 61kg to pounds?
Multiply 61kg by 2.20462. That equals 134.5 pounds. To also convert to stone and pounds, divide 61kg by 6.35 to get 9 stone 8 pounds (9st 8lbs). Use our free weight converter above for instant conversions between kg, stone, and pounds.
Is 61kg a healthy weight?
It depends entirely on your height. At 61kg, your BMI could range from healthy to overweight depending on how tall you are. Use our free BMI calculator to check your exact BMI and NHS category instantly.
What BMI is 61kg at 170cm?
At 170cm (5ft 7in), 61kg gives a BMI of approximately 21.1, which falls in the healthy weight range (18.5–24.9) according to NHS guidelines. This is a healthy weight for that height.
Why does height matter for BMI at 61kg?
BMI measures weight relative to height because taller people naturally weigh more. At 61kg, someone who is 155cm would be overweight, but someone who is 180cm would be underweight. Height is essential for calculating whether your weight is healthy.
Should I lose weight at 61kg?
Only if your BMI is above 25 and your GP recommends it. Check your BMI using our calculator — if you're in the healthy range for your height, your weight is appropriate. Your GP can give personalised advice based on your health, fitness level, and medical history.
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.