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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Best Weight Measuring Scales for UK Health Tracking
Choosing the right weight measuring scale is an important first step in managing your health and monitoring progress. Whether you're tracking your weight for fitness, managing a health condition, or following NHS guidance on healthy weight in the UK, accuracy and consistency matter. A good scales helps you understand your weight trends over time, which is valuable information alongside other health metrics like BMI and body composition.
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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.
What to Look For in a Weight Measuring Scale
The best weight measuring scale for you depends on accuracy, consistency, and how you plan to use it. Key features to consider include:
- Accuracy rating: Look for scales accurate to within 0.1 kg (or 0.2 lbs). Professional-grade scales used in NHS clinics are accurate to 0.1 kg
- Platform size and stability: A sturdy, non-slip surface ensures safe, consistent readings
- Digital display: Easy-to-read LCD screens are preferable to analogue dials, which can be harder to read accurately
- Weight capacity: Ensure the scales can accommodate your weight safely — most household scales support up to 150–180 kg
- Body composition features: Bioelectrical impedance analysis (BIA) scales estimate body fat percentage, though these are less accurate than other methods
- Connectivity: Bluetooth-enabled scales can sync with health apps, helping you track progress over time
Digital bathroom scales are most common in UK homes and are generally accurate if maintained properly. Place your scales on a hard, flat surface — never on carpet — and use them at the same time each day for consistency.
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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.
Using Your Scale With NHS Health Guidance
Your weight alone is just one part of your overall health picture. The NHS recommends monitoring weight alongside other metrics including BMI, waist circumference, and general fitness levels. Use our free BMI calculator to understand what your weight means for your health category, and the weight converter to switch between kg, stone, and pounds if needed.
Weigh yourself weekly rather than daily — weight fluctuates naturally due to hydration, food intake, and hormonal changes. A weekly pattern is more meaningful than daily variations. If you're following a weight management plan, working with your GP or a healthcare professional ensures your goals are realistic and sustainable. For those using weight loss support or medication, regular weight monitoring becomes part of your broader health management plan.
- 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 accurate do bathroom scales need to be?
Household bathroom scales should be accurate to within 0.1 kg (approximately 0.2 lbs). This level of accuracy is sufficient for home monitoring and consistent with NHS clinical standards. Professional scales in GP surgeries and hospitals are calibrated regularly to maintain this accuracy.
Why do my scales give different readings on different days?
Daily weight fluctuates due to hydration levels, food intake, menstrual cycle, and sodium consumption. These variations don't reflect fat loss or gain. Weigh yourself at the same time each day (preferably morning before eating) and track weekly patterns rather than obsessing over daily changes.
Can bioelectrical impedance (BIA) scales accurately measure body fat?
BIA scales provide estimates of body fat percentage but are less accurate than clinical methods like DEXA scans. They can be useful for tracking trends over time, but individual readings may vary significantly. Use them as one part of your health picture, not as definitive body composition data.
Should I use my weight scales if I'm pregnant?
Yes, but with context. Regular weighing during pregnancy is normal, but NHS guidance focuses on overall health rather than specific weight targets. Discuss healthy weight gain with your midwife or GP — weight changes during pregnancy are expected and necessary for fetal development.
How often should I replace my bathroom scales?
Well-maintained scales can last 5–10 years. Replace them if they give inconsistent readings, the display malfunctions, or the platform becomes unstable. Recalibrate digital scales annually by placing a known weight (like a 10 kg barbell) on them to check accuracy.
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.