The Numbers Behind the Calculation — and Why They Matter on a GLP-1 Journey
The formula is straightforward:
- Weight lost = Starting weight − Current weight
- Percentage lost = (Weight lost ÷ Starting weight) × 100
So if your starting weight was 115 kg and you now weigh 104 kg, your calculation looks like this: (11 ÷ 115) × 100 = 9.6%. You have lost just under 10% of your original body weight.
Why percentage rather than total kilograms?
Two people can both lose 8 kg and have very different journeys. Someone who started at 90 kg has lost nearly 9% of their body weight; someone who started at 150 kg has lost around 5%. The percentage figure gives a proportional view that is more useful for setting realistic expectations and recognising genuine progress.
Connecting weight loss to the numbers you track every day
Percentage weight loss does not exist in isolation — it is shaped by how consistently you track calories, macros, and activity. Understanding how many calories you need each day gives you a baseline to work from, while learning the practical side of how to calculate calories in food helps you understand the inputs that drive the percentage figure on the scale. Macros — particularly protein — also matter: keeping protein intake steady helps protect lean mass as weight comes down, which influences how that percentage change looks on your body, not just in the maths.
What about calories burned?
Activity feeds directly into the energy balance that drives weight change. Understanding how apps calculate calories burned can help you judge whether your activity estimates are broadly accurate, so the percentage loss picture is built on reliable data rather than guesswork.
One note of caution: percentage weight loss is a useful tracking tool, not a clinical target. The right pace and end-point for your journey is something to discuss with your prescriber or doctor, who can assess your full picture.
average weekly weight change in the first 16 weeks of Mounjaro & Wegovy use*
Tracking the right four numbers — weight, waist, protein and dose — turns a noisy chart into a clear story. That's the loop GLP-1 users keep coming back for.
AI Meal Tracking. Built for GLP 1 Appetites.
Point your camera at any meal and let our AI do the rest. Breakfast, doses, weight, mood all tracked in seconds.
Track Your Percentage Loss Automatically with GLP Trackr
Doing the maths manually every week is straightforward, but keeping the calculation accurate depends on logging weight consistently — and that is where GLP Trackr earns its place. The app's weight and body tracking feature records every weigh-in and plots your trend over time, so you can watch your percentage loss take shape without reaching for a calculator.
Weight logging that does the work for you
Log your weight during the daily morning check-in — it takes about 30 seconds — and GLP Trackr builds a running chart from your starting point. The week-at-a-glance view and weekly transformation summary mean you always have a clear picture of where you are relative to where you began.
Pair it with calorie and macro tracking
Because percentage loss is driven by energy balance, the app's AI photo-scan food logging connects the two sides of the equation. Point your camera at a meal and get an instant breakdown of calories, protein, and macros — no manual entry needed. Set your daily targets across the full calorie and nutrition tracking hub, and you have the inputs and the output in one place.
GLP Trackr is a tracking tool, not a medical service. The numbers it surfaces are there to inform conversations with your prescriber or doctor — always follow their guidance on targets and progress.
Ready to watch your percentage loss update in real time? Download GLP Trackr on the App Store or Google Play — your first 7 days are completely free.
What does glptrackr include?
10+ powerful features. One app. Built specifically for Mounjaro and Wegovy users.
Everything your GLP-1 journey needs. Free to try for 7 days.
Morning Check-In
Start every day with a 60-second wellness check-in. Log how you're feeling, track nausea, appetite, energy, and mood — giving you and your care team a complete picture of how your medication is working.
Injection Tracking
Log every dose with a single tap. Track your dose history, phase in your cycle, estimated medication levels, and upcoming injection dates — with reminders so you never miss a scheduled shot.
Hydration Reminders
Staying hydrated is especially important on GLP-1 medications. Set daily water targets, log intake throughout the day, and receive smart nudges when you're falling behind your goal.
Smart Meal Planning
Personalized meal plans built around your current dose phase and side effects. Every meal is GLP-1 optimized — high in protein, gentle on the stomach, and scaled to your reduced appetite.
Recipe Library
Browse 50+ high-protein, GLP-1-friendly recipes filtered by meal type, prep time, and dietary needs. Every recipe includes full nutrition info, step-by-step instructions, and tips for eating with side effects.
Progress Analytics
Beautiful, easy-to-read charts show your weight loss trajectory, weekly nutrition trends, medication responses, and wellbeing scores over time — turning raw data into genuine insights.
AI Meal Scanning
Snap a photo of any meal and get a full nutrition breakdown in seconds — calories, protein, carbs, fat, and fibre. No searching. No manual logging. Just point, snap, and track.
Exercise & Steps
Log walks, workouts, and movement with activity targets that flex with your energy levels. On lower-energy dose days, gentler targets keep you moving without burning out.
Community Support
Connect with thousands of others navigating the same medication journey. Share milestones, ask questions, find accountability partners, and get support from people who truly understand.
Never Forget a Dose Again.
Log your Mounjaro or Wegovy injection in seconds. Track your pen, your dose level, and your injection site — so you always know exactly where you are in your treatment.
Watch Your Body Transform, Week by Week.
Log your weight, measurements, and how you're feeling after each dose. GLPTrackr turns your data into clear, motivating charts that show you how far you've really come.
You're Not on This Journey Alone.
Connect with thousands of real GLP-1 users sharing their wins, side effect tips, and meal ideas. Get the support of people who truly get it — because they're living it too.
Download on the App Store Download on the Google Play
Founding Member Offer
One plan. Everything included. No hidden extras.
Founding Member
Exclusive Offer
Join the first 1,000 membersand lock in our lowest ever price
Offer expires in:
786 of 1000 founding spots remaining
50% OFF
Lifetime Price Lock
Never pay full price • Forever
🔒 No credit card required • Cancel anytime
Premium
Ad-free- Track weight, meals, water, exercise, & sleep
- Log doses, injection sites, & side effects
- 60-second daily morning check-in
- AI meal scanning & barcode scanning
- Personalised AI meal plans & recipes
- Golden Dose Finder AI
- Medication Clock — real-time level tracking
- Daily Brief and predictive side effects
- Full insights & weekly transformation cards
- Unlimited progress photos
- Doctor PDF export & body measurements
- Community Access—Connect with GLP-1 users
Powered by
🔒 No credit card required • Cancel anytime
The Most Advanced GLP-1 Brain Ever Built.
The first AI built exclusively for GLP-1 weight loss. Every insight, every meal plan, every prediction trained on one thing only: helping you get the most out of your medication.
Knows Your Cycle
GLPIQ tracks where you are in your injection cycle and adjusts everything around it: lighter meals on nausea days, higher protein when appetite returns, and smarter targets as your medication level shifts.
Predicts Before You Feel It
GLPIQ learns your personal side effect patterns over time. After a few cycles, it starts warning you the morning before a rough day — and adjusts your meal plan automatically.
Finds Your Golden Dose
GLPIQ analyses every dose you've been on: weight loss rate, side effects, food noise, mood, protein adherence and tells you which dose gave you the best results. No other app does this.
Download glptrackr today.
Available on iOS and Android. 7-day free trial, no credit card needed.
Frequently asked questions.
Subtract your current weight from your starting weight to find the amount lost, divide that figure by your starting weight, then multiply by 100. For example, losing 10 kg from a starting weight of 120 kg equals a 8.3% loss.
A common starting point is estimating your total daily energy expenditure (TDEE) based on your weight, height, age, and activity level, then aiming for a modest calorie deficit. The right target for your situation is best confirmed with your prescriber or doctor.
Macros are calculated as percentages or fixed gram targets of your daily calorie goal. Protein is typically prioritised — commonly cited as 1.2–1.6 g per kg of body weight — to protect lean mass. Exact targets depend on your individual circumstances and are best agreed with a healthcare professional.
Calories in food are calculated using nutritional data from food labels, databases, or AI-powered scanning tools. Apps like GLP Trackr let you scan a barcode or photograph a meal to get an instant calorie and macro breakdown, removing the need for manual calculation.
Most apps estimate calories burned by combining your basal metabolic rate with activity data from step counts or connected wearables, using established energy-expenditure formulas. These are estimates rather than precise measurements, so they are best used as a general guide.