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
Weekly Weight Loss Tracker — How to Monitor Your Progress
A weekly weight loss tracker helps you monitor your progress and stay motivated on your weight management journey. Tracking regularly gives you clear visibility of patterns, helps identify what's working, and supports sustainable weight loss. Whether you're managing weight through lifestyle changes, NHS weight loss programmes, or prescription medication, consistent tracking is key to success. This guide explains how to use a weekly tracker effectively, what to measure, and how to interpret results in a UK health context.
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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.
How to Use a Weekly Weight Loss Tracker Effectively
Consistency is more important than frequency. Weigh yourself at the same time each week—ideally first thing in the morning before eating or drinking—to get comparable readings. Use the same scales each time, as different scales can vary by up to 2 kg.
- Record your weight in both kg and stone for UK context
- Note the date and time of each weekly measurement
- Track any lifestyle changes (diet, exercise, medication changes)
- Record how you're feeling—energy levels, mood, clothing fit
- Include relevant health metrics: blood pressure, waist circumference
The NHS recommends losing weight at a rate of 0.5 to 1 kg per week for sustainable results. Your tracker should reflect this realistic expectation. Use our free progress tracker above to log weekly measurements and visualise your progress over time. Weight naturally fluctuates day-to-day due to water retention, food intake, and hormonal factors—weekly tracking smooths out these variations and shows the true trend.
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.
Understanding Weekly Weight Loss Patterns and When to Adjust
Weight loss is not linear. You may lose 1 kg one week, stay the same the next, then lose 1.5 kg the following week—this is completely normal. Look at the trend over 4–6 weeks rather than judging progress week-to-week. If you're not seeing progress after 4–6 weeks of consistent effort, speak to your GP about next steps.
For those using GLP-1 weight loss medication (such as Wegovy or Mounjaro), weekly tracking is especially valuable as it helps monitor treatment effectiveness. Clinical trials show these medications support average weight loss of 15–21% over time—use our GLP-1 weight loss calculator to estimate potential progress at your dose. Always combine tracking with lifestyle changes: reduced-calorie diet, increased physical activity, and behaviour change. Your prescriber may also ask for weekly weight records at review appointments.
- 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 often should I weigh myself when tracking weight loss?
Weekly weighing is ideal—more frequent daily weighing can be demoralising due to natural water weight fluctuations. Weigh yourself on the same day and time each week, ideally first thing in the morning before eating. Use the same scales each time for consistency. Our progress tracker makes weekly logging simple and shows your trend over time.
What should I record besides my weight each week?
Beyond weight in kg and stone, note your energy levels, how your clothes fit, waist circumference, and any lifestyle changes. If you're on weight management medication, record your dose and any side effects. These contextual notes help you understand what's driving results and stay motivated beyond the number on the scales.
My weight hasn't changed this week—does this mean I've failed?
No. Week-to-week weight can plateau due to water retention, hormones, or muscle gain from exercise—this is normal. The NHS advises looking at trends over 4–6 weeks rather than individual weeks. If there's no progress over 4–6 weeks despite consistent effort, consult your GP about adjusting your approach or exploring prescription weight loss options.
How does prescription weight loss medication affect weekly tracking?
GLP-1 medications like Wegovy or Mounjaro are used alongside diet and exercise. Weekly tracking shows how well the medication is supporting your efforts. Average weight loss in clinical trials is 15–21% of body weight over time—individual results vary. Your prescriber may request weekly records at check-ins to monitor effectiveness and adjust doses.
What if my weekly weight loss is faster than 1 kg per week?
Faster loss is possible, especially in the first 4–6 weeks or with significant lifestyle changes. However, the NHS recommends 0.5–1 kg per week for sustainable loss that preserves muscle. If you're losing significantly faster, discuss this with your GP to ensure you're losing fat, not muscle, and not adopting unsustainable habits.
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.