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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How to Convert US Pounds to Kilograms
Converting US pounds (lbs) to kilograms (kg) is straightforward using a simple mathematical formula. If you're tracking your weight for NHS guidance, managing a health condition, or preparing for a GP appointment, understanding both measurement systems is helpful. This guide explains the exact conversion, provides reference tables, and shows how kg relates to your healthy weight range using UK health standards.
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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.
The Pounds to Kilograms Conversion Formula
The exact conversion is: 1 pound = 0.453592 kg. To convert any weight in US pounds to kilograms, simply multiply the number of pounds by 0.453592. For example, 150 lbs × 0.453592 = 68 kg. Conversely, 1 kg = 2.20462 lbs, so you can divide kg by 2.20462 to get pounds. This conversion applies whether you're measuring body weight, food portions, or any other mass. The formula works consistently across all measurements.
- 200 lbs = 90.7 kg
- 180 lbs = 81.6 kg
- 160 lbs = 72.6 kg
- 140 lbs = 63.5 kg
- 120 lbs = 54.4 kg
For UK nhs guidance, weight in kilograms is the standard measurement used in health assessments. If your GP asks for your weight, they will typically record it in kg, though many UK adults still think in stone and pounds for personal tracking.
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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 Your Weight in Kg and Healthy Weight Ranges
Once you've converted your weight to kg, you can check it against NHS healthy weight guidelines. For most UK adults, a healthy BMI falls between 18.5 and 24.9 kg/m². Use our free weight converter above to switch between kg, stone, and pounds instantly, and our BMI calculator to see where your weight sits in the healthy range for your height. For adults of South Asian, Black African, or Black Caribbean heritage, slightly lower thresholds apply due to higher health risks at the same BMI level.
Understanding your weight in kg helps when researching weight management options, reading clinical guidance, or discussing health with your healthcare provider. Many UK weight loss services and health apps use kg as the standard measurement.
- 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 the exact conversion from pounds to kg?
The conversion is 1 pound = 0.453592 kg. To convert any weight, multiply the number of pounds by 0.453592. For example, 160 lbs = 72.6 kg. The reverse conversion is 1 kg = 2.20462 lbs, so you can divide kg by this number to get pounds back.
Why do UK health services use kg instead of pounds?
The UK NHS uses kilograms as the standard measurement because it aligns with international medical practice and scientific research. Most clinical guidelines, medications, and health calculations are based on metric measurements. However, many UK adults still use stone and pounds personally for tracking weight.
How does my weight in kg relate to a healthy BMI?
Your BMI is calculated as your weight in kg divided by your height in metres squared. A healthy BMI for most UK adults is 18.5 to 24.9. Try our free BMI calculator on this page to enter your weight in kg and height, and see exactly where you sit in the healthy range for your individual height.
Should I track my weight in lbs or kg?
Either works, but kg is more useful when consulting NHS guidance, your GP, or health professionals in the UK. If you're using weight loss apps or health services, kg is typically the standard. Our free weight converter lets you track in any unit and switch between measurements instantly.
How is pounds different from stone?
The UK also uses stone as a traditional measurement. One stone equals exactly 14 pounds, or 6.35 kg. So 160 lbs = 11st 6lbs = 72.6 kg. Many UK adults prefer using stone and pounds for personal tracking, though medical services record weight in kg for consistency with international standards.
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.