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
Weight Scale Weights — Understanding Your Measurements
Weight scale readings vary depending on which unit your scales display — kilograms, stone, or pounds. In the UK, most people use stone and pounds for body weight, though healthcare professionals use kilograms. Understanding how to read and convert your weight scale weights is essential for tracking your health progress and comparing your measurements against NHS healthy weight guidance. Whether you're checking your weight at home or at a GP surgery, knowing what your weight means is the first step towards better health management.
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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.
UK Weight Measurements and NHS Guidance
The NHS uses kilograms for all clinical weight measurements, but UK adults typically refer to their weight in stone and pounds. One stone equals 14 pounds exactly, or 6.35 kg. A standard UK bathroom scale usually displays weight in either stone and pounds combined (e.g., 11st 7lbs) or in kilograms. Understanding your weight scale weights is easier when you know these conversions:
- 1 stone = 6.35 kg = 14 lbs
- 1 kg = 0.157 stone = 2.20 lbs
- 10 stone = 63.5 kg = 140 lbs
According to NHS healthy weight guidance, the ideal BMI range for UK adults is 18.5 to 24.9. Your weight scale weights are just the starting point — it's your BMI (body mass index), which combines weight and height, that determines whether you fall within the healthy weight range. Many UK adults are overweight or obese, with approximately 63% classified as overweight or obese according to recent UK health surveys. Use our free BMI calculator above to check whether your weight scale reading puts you in a healthy weight range.
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.
Using Weight Scales Accurately in Your Health Journey
For consistent weight tracking, weigh yourself at the same time each day — ideally in the morning before eating, after using the bathroom. Weight naturally fluctuates by 1–2 kg throughout the day due to food, water, and waste. Digital scales are generally more accurate than mechanical scales, but all scales should be placed on a flat, hard surface for the best reading. Consider using our free progress tracker to log your weight scale weights regularly, which helps identify trends beyond daily fluctuations.
If you're concerned about your weight scale readings or want personalised advice about what your weight means for your health, speak to your GP. They can assess your individual circumstances and discuss weight management options if needed. Remember, weight is just one indicator of health — your GP considers your overall fitness, medical history, and lifestyle as well.
- 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 do weight scale weights mean in terms of health?
Weight scale weights alone don't indicate health — you need to consider your BMI, which combines weight and height. Our free BMI calculator tells you whether your weight scale reading falls into the healthy, overweight, or obese range according to NHS guidelines. For South Asian, Chinese, Black African, or Black Caribbean adults, lower BMI thresholds apply due to higher health risks at lower weights.
How do I convert my weight scale weights from kg to stone?
Divide kilograms by 6.35 to get stone. For example, 70 kg ÷ 6.35 = 11 stone. Our free weight converter on this page lets you instantly convert between kg, stone, and pounds without a UK pharmacy calculation, making it easy to understand what your scales display.
Why do UK weight scales show both stone and kilograms?
UK adults traditionally use stone and pounds for body weight, while the NHS and healthcare professionals use kilograms for clinical records. Modern UK scales often display both units so you can use whichever measurement you prefer. Understanding both systems helps you communicate clearly with your GP and healthcare team.
How often should I check my weight scale weights?
The NHS recommends weighing yourself once per week, ideally at the same time of day. Daily weighing can be misleading because weight naturally varies by 1–2 kg due to water retention, food, and digestion. Weekly checks give you a clearer picture of your actual progress. Using our progress tracker helps you spot trends rather than focusing on daily fluctuations.
What's the difference between my weight scale weights and my healthy weight?
Your weight scale weights are your current measurement. Your healthy weight range depends on your height — it's expressed as a BMI between 18.5 and 24.9. Use the BMI calculator on this page with your weight and height to find your personal healthy weight range according to NHS guidance.
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.