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 Can You Weigh Yourself in the UK?
Knowing where to weigh yourself is an important part of tracking your health and monitoring weight changes. In the UK, you have several options — from your GP surgery and NHS services to community pharmacies, gyms, and scales at home. Having access to accurate, regular weight measurements helps you stay informed about your health status and supports any weight management goals you may have. This guide covers all the places where you can weigh yourself and how to get the most from regular weight monitoring.
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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.
Main Places to Weigh Yourself in the UK
Your GP Surgery remains one of the most reliable places to weigh yourself. Most GP surgeries have calibrated scales in their clinics, and your weight is recorded on your NHS medical record. If you're managing a health condition or working with weight management, your GP can track changes over time and provide personalised NHS guidance. NHS Community Health Services also offer weight monitoring — particularly through tier 1 and tier 2 weight management services. Many areas run free or low-cost NHS Weight Loss Plan programmes that include regular weighing and support.
- Pharmacy chains (a UK pharmacy, a UK pharmacy, etc.) — most have free or low-cost weighing services
- Community leisure centres and gyms — fitness facilities typically provide scales for members
- Sexual health and contraception clinics — often offer free weight monitoring
- Workplace health services — if your employer offers occupational health screening
These locations provide professional-grade scales that are regularly calibrated for accuracy, which is important for tracking genuine progress rather than daily fluctuations.
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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.
Weighing Yourself at Home and Tracking Progress
Investing in a home weighing scale is practical for regular monitoring between appointments. Digital scales are affordable, reasonably accurate, and convenient for tracking your weight journey. For best results, weigh yourself at the same time each day (ideally morning before food and drink), on the same scale, wearing similar clothing.
Consistency matters more than frequency — weighing yourself once or twice weekly gives a clearer picture than daily checks, which can vary by up to 2 kg due to water retention, digestion, and hormonal changes. If you're tracking weight loss, use our free progress tracker to log changes over time and spot trends. Combined with our free BMI calculator and weight converter, you'll have a complete picture of where you stand against NHS healthy weight guidelines.
- 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 yourself at home or at your GP surgery?
Both are useful. GP surgeries use calibrated professional scales and record your weight on your NHS record, which is valuable for health tracking. Home scales are convenient for regular monitoring between appointments. Ideally, use both — professional weighing at your GP for baseline and accountability, plus home scales for ongoing tracking.
How often should I weigh myself?
The NHS recommends weighing yourself once or twice weekly rather than daily. Daily weight naturally fluctuates by up to 2 kg due to water retention, meals, and hormones. Weekly weighing gives a more accurate picture of genuine progress and helps prevent discouragement from normal daily variations.
Can I get free weighing at a UK pharmacy?
Most major UK pharmacy chains (a UK pharmacy, Lloyds, a UK pharmacy) offer free or low-cost weight monitoring services. Some pharmacies are part of NHS weight management services and may offer additional support and advice. Phone ahead to check local availability.
What's the best time of day to weigh yourself?
The best time is first thing in the morning, before eating or drinking, after using the toilet. This minimises variables and gives the most consistent reading. Try to weigh yourself on the same day and time each week for accurate comparison.
Do I need to tell my GP if I'm trying to lose weight?
Yes — informing your GP is recommended, especially if you're making significant lifestyle changes or considering prescription weight loss support. Your GP can monitor your progress, ensure weight loss is safe, and refer you to NHS tier 3 specialist weight management services if appropriate.
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.