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
How Many Pounds Have I Lost — Tracking Your Weight Loss
Tracking how many pounds you've lost is a straightforward way to monitor your weight loss progress, especially if you prefer imperial measurements. Whether you're following a reduced-calorie diet, taking prescription weight loss medication like Wegovy, or increasing physical activity, knowing your exact loss in pounds helps you stay motivated and assess whether your approach is working. Our free progress tracker and weight converter make it easy to log and convert your results across different units — stone, kilograms, and pounds.
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.
How to Calculate Your Pounds Lost
Calculating how many pounds you've lost is simple: subtract your current weight from your starting weight. For example, if you started at 200 lbs and now weigh 185 lbs, you've lost 15 pounds.
Using different units? If your starting weight is in stone and pounds, or kilograms, use our free weight converter above to switch to pounds for easy tracking. The standard conversions are: 1 kilogram = 2.2 pounds, and 1 stone = 14 pounds exactly.
For NHS health guidance, aim to lose 1 to 2 pounds (0.5 to 1 kg) per week for sustainable results. This rate minimises muscle loss and is more likely to be maintained long-term. Track your progress weekly or monthly using our free progress tracker on this page to see your trends clearly.
Clinically BackedWeight Loss
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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.
Weight Loss Context — What's Considered Healthy Progress
Even losing 5 to 10 pounds (2.3 to 4.5 kg) can bring measurable health benefits, including improved blood pressure and blood sugar control. If you're using prescription weight loss medication like Wegovy or Mounjaro, clinical trials have shown average weight loss of around 15% of body weight, though individual results vary significantly.
Use the BMI calculator on this page to see how your weight loss has affected your BMI category, and check your healthy weight range for your height. Remember that weight fluctuates naturally due to water retention, hormones, and digestion — so tracking over weeks or months, rather than daily, gives a clearer picture of real fat loss.
- 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 losing 5 pounds in a month healthy?
Yes. Losing approximately 1 to 1.25 pounds per week (5 pounds monthly) is considered healthy and sustainable by NHS guidelines. This pace typically reflects a calorie deficit without requiring extreme restriction, and it minimises muscle loss and metabolic slowdown.
How do I convert my weight loss from kilograms to pounds?
Multiply kilograms lost by 2.2. For example, if you've lost 5 kg, that equals 11 pounds. Our free weight converter above instantly converts between kg, stone, and pounds, so you can track in whichever unit you prefer.
What should I do if my weight loss has plateaued?
Weight loss plateaus are normal — the body adapts to lower calorie intake. Try increasing physical activity, reassessing your calorie intake, or speaking to your GP about whether medication like Wegovy might be appropriate. Our GLP-1 weight loss calculator can help explore what medication-supported loss might look like for you.
Does losing pounds mean I'm definitely losing fat?
Not always. Weight loss includes water, muscle, and fat. A scale only shows total weight, not composition. Losing 1 to 2 pounds weekly alongside strength exercise suggests you're losing primarily fat, which is the healthiest approach.
Can I track my weight loss in both stone and pounds?
Absolutely. Our free progress tracker lets you log weight in any unit — stone, pounds, or kilograms — and the tool converts automatically. This makes it easy to communicate results to your GP or healthcare team using NHS measurements (kilograms) while tracking personally in pounds.
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.