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
Kilo to Kg — They're the Same Unit
The short answer: a kilo and a kg are exactly the same thing. "Kilo" is short for kilogram, and "kg" is the abbreviation. There's no conversion needed between them — they're identical units of weight measurement used across the UK, NHS health services, and internationally. If you're trying to convert your weight to a different unit like stone or pounds, or understand what your weight means for your health, MyWeightCheck has tools and guidance to help.
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.
Why The Confusion Exists In UK Health Contexts
The mix-up often arises because the UK uses multiple weight units — kilograms (metric), stone and pounds (imperial), and occasionally just pounds. The NHS records clinical measurements in kilograms, but many UK adults still think and talk about their weight in stone and pounds. When someone says "I weigh 70 kilos", they might then search for "kilo to kg" trying to convert to a different unit, not realising they're the same.
- Kg = kilogram (SI unit, used in medicine and science)
- Kilo = colloquial short form of kilogram
- Both equal exactly 1,000 grams
- No conversion factor exists between them
If you need to convert your weight into stone, pounds, or understand your healthy weight range according to NHS guidance, use our free weight converter on this page — it handles all UK measurements instantly.
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.
Converting Kilos To UK Measurements For Health Context
If you're checking your weight against NHS health guidance or want to know your BMI, converting kilograms to stone and pounds often makes more sense in the UK context. Use our free BMI calculator above to enter your weight in any unit (kg, stone, or pounds) and instantly see where you fall on the NHS healthy weight scale.
A healthy BMI according to NHS guidance is between 18.5 and 24.9 for most UK adults — though lower thresholds apply if you're of South Asian, Chinese, Black African, or Black Caribbean heritage. Your GP can provide personalised advice about what your weight means for your individual health.
- 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.
Is kilo the same as kg?
Yes, completely. "Kilo" is simply the common short form of kilogram, and "kg" is the abbreviation. They represent the exact same unit of weight — 1,000 grams. There is no conversion between them because they are identical.
How do I convert my weight in kilos to stone?
Divide your weight in kilograms by 6.35029 to get stone. For example, 70 kg ÷ 6.35 = 11 stone (approximately). Use our free weight converter on this page to do this instantly for any weight.
What does my weight in kilos mean for my health?
Use your weight in kg alongside your height to calculate your BMI using our free BMI calculator. The NHS considers a BMI of 18.5–24.9 healthy for most adults. Your GP can discuss whether your weight is healthy for you individually.
Why does the NHS use kilograms for weight?
The UK NHS uses the metric system (kilograms) for all clinical measurements because it's the international standard in medicine and science. This ensures consistency and accuracy across healthcare services.
Is my weight different in kilos versus pounds?
No — your actual weight is the same regardless of the unit used to measure it. 1 kg = 2.20462 pounds. Only the number changes, not the weight itself. Use our weight converter to switch between units.
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.