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
Easy Weight Loss: What Actually Works
Easy weight loss doesn't mean quick fixes or crash diets—it means sustainable, manageable approaches that fit your life. The NHS recommends losing weight at a rate of 0.5 to 1 kg per week alongside lifestyle changes. Whether through dietary adjustments, increased physical activity, or prescription weight loss medication, there are evidence-based options available to UK adults. This guide covers realistic strategies and the support available through both NHS weight management services and private prescribing options to help you find an approach that works for you.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
Realistic Weight Loss Methods Backed by Evidence
Easy weight loss starts with understanding that sustainable results require a calorie deficit—typically around 500 kcal per day to lose approximately 0.5 kg per week. This can be achieved through dietary changes, increased physical activity, or a combination of both. NHS weight management guidance emphasises that small, consistent changes are more likely to stick than dramatic overhauls.
- Reduced-calorie diet: Aim for 1,200–1,500 kcal daily for women, 1,500–1,900 kcal for men, depending on current weight and activity level
- Mediterranean diet: Strong evidence supports this approach for both weight loss and cardiovascular health
- Intermittent fasting: Evidence suggests modest weight loss with approaches like 16:8 or 5:2, though results vary
- Increased physical activity: Aim for at least 150 minutes of moderate activity weekly, plus strength training twice weekly
- Behavioural changes: Keeping a food diary, eating mindfully, and managing portion sizes support long-term success
Using our free BMI calculator above can help you track progress and understand your starting point. For weight context across different measurements, our weight converter makes it easy to switch between kg, stone, and pounds as you progress.
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.
Prescription Weight Loss Options Available in the UK
For adults struggling with easy weight loss through lifestyle changes alone, prescription weight loss medications may be an option. GLP-1 injections like Wegovy (semaglutide) and Mounjaro (tirzepatide) may help reduce appetite and support feeling fuller after smaller meals. In clinical trials, these medications supported average weight loss of 15–21% of body weight when combined with a reduced-calorie diet and increased physical activity.
Prescription eligibility typically includes adults with a BMI of 30 or above, or 27 or above with weight-related health conditions like type 2 diabetes or high blood pressure. Access is available through NHS specialist weight management services (tier 3) or private prescribing following an online clinical assessment. Our GLP-1 weight loss calculator can help you explore potential outcomes at different doses if you're considering this route.
- 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's the easiest way to start losing weight?
The easiest starting point is a modest calorie deficit of around 500 kcal per day through small dietary changes and increased activity. This typically results in approximately 0.5 kg per week—sustainable and realistic. Using a food diary and moving more (even 10,000 steps daily) creates momentum without feeling restrictive. Your GP can also refer you to NHS weight management services for structured support.
How long does it take to see easy weight loss results?
Most people notice changes within 4–6 weeks if following a consistent calorie deficit. Weight loss isn't always linear—you may lose more some weeks than others. The NHS recommends aiming for 0.5–1 kg per week. Our free progress tracker helps you log changes and stay motivated, showing patterns over time rather than focusing on daily fluctuations.
Are weight loss injections considered easy weight loss?
Prescription GLP-1 medications like Wegovy and Mounjaro may help make weight loss easier by reducing appetite and food cravings. However, they're prescription-only and require a clinical assessment. They work best alongside lifestyle changes—diet and activity remain essential. Individual results vary significantly, and they're not suitable for everyone.
Can I lose weight easily without exercise?
Weight loss is possible through diet alone, as it primarily depends on creating a calorie deficit. However, the NHS recommends combining dietary changes with at least 150 minutes of moderate activity weekly for best results—this improves cardiovascular health, preserves muscle, and helps with long-term success. Even walking supports easier, sustainable loss.
Is easy weight loss available on the NHS?
Yes. The NHS offers tier 1 self-help resources, tier 2 community programmes, and tier 3 specialist weight management services where prescription medications may be offered. Access and waiting times vary by region. Your GP can refer you to local services. Private online prescribing is also available for eligible adults, with faster access but at personal cost.
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.