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
Where to Weigh Yourself in the UK
Knowing where to weigh yourself accurately is an important part of monitoring your health and weight management in the UK. Whether you're tracking your BMI, managing your weight, or checking your progress, finding a reliable place to weigh yourself is the first step. This NHS health guide covers the best options available to you, from GP surgeries and pharmacies to home scales, and explains how to get the most accurate readings for your health records.
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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 Options for Weighing Yourself
In the UK, you have several reliable places to weigh yourself depending on your needs and access. GP surgeries are the most clinically accurate option—practice nurses use calibrated scales as part of routine health checks and weight monitoring. Your GP can also record your weight against NHS health thresholds and track changes over time. NHS-run weight management services (Tier 3 specialist clinics) provide professional weighing alongside tailored advice if you're referred by your GP. Community pharmacies across the UK often offer free or low-cost weighing services—many high street pharmacies have scales available and some staff can discuss your results. Leisure centres and gyms typically have calibrated scales available to members. Sexual health clinics and antenatal services also weigh patients as part of routine care. For privacy and convenience, many UK adults weigh themselves at home using personal scales, which is perfectly valid for regular monitoring—though less formally recorded than GP measurements.
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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.
Best Practices for Accurate Weight Tracking at Home
If you're weighing yourself at home, consistency is more important than perfection. Weigh yourself at the same time each day (early morning before eating is ideal), on the same scales, and wearing similar clothing—this removes variables and gives you reliable progress data. Use our free progress tracker to log your weight weekly rather than daily, as natural fluctuations of 1–2 kg are normal and daily readings can be discouraging. Ensure your home scales are on a level, hard surface—not carpet—and consider replacing batteries in digital scales annually. If you're managing your weight or tracking health changes, your GP can help interpret your weight trends and advise whether NHS health guidance applies to you. Use our free BMI calculator and weight converter to understand your measurements in both metric and imperial units.
- 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 it better to weigh myself at home or at my GP surgery?
Both are useful. Your GP provides official health records and clinical assessment, ideal for baseline measurements and medical monitoring. Home scales offer convenience for regular tracking. Use home scales for daily monitoring and visit your GP quarterly or annually for formal health assessments. Consistency matters more than location—pick one and stick with it.
How often should I weigh myself?
NHS guidance suggests weighing once a week rather than daily, as natural weight fluctuations of 1–2 kg are normal and don't reflect true progress. Weekly weighing helps you track genuine trends without becoming discouraged by daily variations caused by hydration, food, or hormonal changes.
What's the most accurate time of day to weigh myself?
Early morning after using the toilet and before eating or drinking is most reliable. You'll have emptied your bladder and bowels, and haven't consumed food or fluids yet. This removes the most variables and gives consistent readings—though any consistent time works if you always use the same time.
Can I use pharmacy weighing services for free in the UK?
Many community pharmacies offer free weighing as part of their health services, especially those with NHS contracts. Some may charge a small fee. Ring ahead to check what your local pharmacy offers. Some also provide brief advice about healthy weight ranges based on NHS guidelines.
Should I use my GP's weight measurements or track at home?
Use both. Your GP's measurements become part of your official health record and are clinically validated. Home tracking between GP visits helps you monitor progress and stay motivated. When you visit your GP, comparing their measurement to your home tracking shows whether your scales are calibrated accurately.
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.