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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Compare Weight Loss To Objects — Visualising Your Progress
Understanding how much weight you've lost can be challenging when numbers alone don't feel real. Comparing your weight loss progress to everyday objects helps make that achievement tangible and motivating. Whether you're managing your weight through lifestyle changes, prescription weight loss medication, or a combination of approaches, visualising progress in familiar terms can help you appreciate the genuine health improvements you're making. This guide shows you exactly what different amounts of weight loss actually represent in everyday terms.
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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.
Common Objects That Match Different Weight Loss Amounts
Weight loss becomes more meaningful when you compare it to objects you see every day. A loss of 1 kg (2.2 lbs) is roughly equivalent to a large bag of sugar, a bag of flour, or a small pineapple. 5 kg (11 lbs) is similar to a medium-sized bag of potatoes, a small car tyre, or two rotisserie chickens. 10 kg (22 lbs) equals roughly a large bag of flour plus another, or a sizeable sack of vegetables.
These comparisons aren't just for fun — they help you realise that losing even modest amounts of weight represents a significant physical achievement. For perspective, the NHS weight management guidance suggests aiming for 0.5 to 1 kg per week, which means that after just a month you could have shifted the equivalent of a large bag of potatoes. If you're using prescription weight loss medication alongside lifestyle changes, our GLP-1 weight loss calculator can help you estimate projected progress at different stages.
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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.
Milestone Objects For Larger Weight Loss Goals
As your weight loss journey progresses, the comparisons become even more impressive. 20 kg (44 lbs) is equivalent to an average-sized dog, a small child, or a large sack of flour. 30 kg (66 lbs) matches the weight of a small adult, a large bag of dog food, or several bags of groceries combined. 50 kg (110 lbs) represents a typical adult woman's body weight — an astonishing physical transformation.
Track your actual progress using our free progress tracker, which lets you record your weight regularly and see your achievements accumulate over time. For your context, use our free BMI calculator and weight converter to understand where you stand now and set realistic goals that matter to your health, not just the numbers on the scale.
- 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 much weight loss is considered healthy per week?
The NHS recommends losing 0.5 to 1 kg (1 to 2 lbs) per week for sustainable, healthy weight loss. This pace reduces muscle loss and helps establish lasting lifestyle changes. Faster loss is possible with medical support but should only be done under healthcare supervision. Individual rates vary based on starting weight, metabolism, and approach.
Why is visualising weight loss with objects helpful?
Using everyday object comparisons makes abstract numbers tangible and motivating. Knowing you've lost the weight of a bag of sugar feels more real than "1 kg", which helps maintain motivation throughout your weight loss journey. It also helps you appreciate the genuine physical achievement, even when progress feels slow on the scales.
What if I'm using prescription weight loss medication like Mounjaro or Wegovy?
Prescription weight loss medications may help alongside reduced-calorie diet and increased physical activity. Clinical trials showed Wegovy helped participants lose an average of around 15% body weight, while Mounjaro averaged 15–21% — individual results vary significantly. These medications require prescription and clinical assessment from a GP or licensed prescriber.
How do I track my weight loss progress accurately?
Weigh yourself weekly at the same time (morning is best), ideally on the same day. Use our free progress tracker to log your weight and visualise your progress over time. Remember that weight fluctuates daily due to water, food, and hormones — focus on the overall trend rather than daily changes. Our BMI calculator also shows how your BMI improves as you lose weight.
Is weight loss alone enough, or do I need to change my lifestyle too?
Sustainable weight loss combines dietary changes, increased physical activity, and behaviour change. Whether using prescription medication or lifestyle approaches alone, the NHS weight management guidance emphasises that lasting results come from establishing healthy habits. Prescription medications work best alongside these changes, not instead of them.
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.