What a Diet Calculator Actually Tells You
A diet calculator estimates your daily calorie needs based on a few key inputs: your current weight, height, age, sex, and how active you are day to day. The number it produces is sometimes called your Total Daily Energy Expenditure (TDEE) — broadly, the calories your body uses in a typical day. Eating at a modest deficit below that figure is what drives gradual weight loss.
Why this matters more on a GLP-1 medication
GLP-1 medicines reduce appetite significantly, which is helpful — but it can also mean eating far too little without realising it. Very low calorie intake over time can lead to muscle loss, fatigue, and nutrient deficiencies. A diet calculator gives you a reference point so you can aim for a controlled deficit rather than an accidental one.
Protein: the number to watch alongside calories
General nutritional guidance consistently highlights protein as especially important during weight loss, because it helps preserve lean muscle mass. Many people on GLP-1 medications find that protein targets feel harder to hit when overall food intake drops. A diet calculator that breaks down macros — not just total calories — helps you see whether protein is being crowded out. As a general educational reference, many dietitians suggest roughly 1.2–1.6 g of protein per kilogram of body weight during active weight loss, though your own needs may vary; always discuss personal nutrition targets with your prescriber or a registered dietitian.
What a calculator cannot do
A diet calculator produces an estimate, not a prescription. Metabolic rate, medication effects, activity levels, and individual health conditions all affect the real figure. Treat the output as a useful starting reference, not a clinical directive. If you have any health conditions that affect your nutritional needs, speak with your healthcare professional before making significant dietary changes.
If you want to dig into related calculations, you can explore how calorie targets are calculated on a GLP-1 journey, use the weight reduction calculator to project steady progress, or see how the Mounjaro-specific calculator frames things for tirzepatide users. For a broader overview of all the tools available, visit our calorie and diet calculator hub.
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 Diet Automatically with GLP Trackr
Running a manual diet calculator once is useful — but the real insight comes from tracking your intake consistently every day, especially when appetite fluctuates as much as it does on a GLP-1 medication. That is where GLP Trackr's food logging makes the biggest difference.
AI photo scanning takes the effort out of logging
Instead of searching a database after every meal, you can point your phone camera at your plate and let the app estimate calories, protein, and macros from the photo automatically. On days when appetite is low and meals are small, this removes the friction that usually makes food logging feel like too much work.
Set targets and watch them fill in
Once you have a calorie and protein figure from your diet calculator, you can set those as daily targets inside GLP Trackr. As you log meals — by photo, barcode scan, or search — the app tracks progress against those targets in real time, so you can see at a glance whether you are hitting your protein goal or drifting too low on calories.
Bring your data to appointments
GLP Trackr also generates a summary of your nutrition patterns over time, which you can bring to your next appointment. If your prescriber or a dietitian wants to understand how your eating has changed since starting your medication, having a clear log is far more useful than trying to recall it from memory.
GLP Trackr is available free on the App Store and Google Play. Give it a try — there is a 7-day free trial so you can see whether consistent diet tracking makes a difference to your journey before committing.
GLP Trackr is an informational and tracking tool. It is not a substitute for advice from your prescriber, doctor, or a registered dietitian. If you have questions about your personal calorie or nutrition needs, please discuss them with your healthcare professional.
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.
A diet calculator estimates your Total Daily Energy Expenditure — roughly how many calories your body uses in a day — based on your weight, height, age, sex, and activity level. It gives you a reference point for setting a calorie target, not a personal medical prescription.
There is no single answer, as the right calorie intake depends on your individual body, activity level, and health history. A diet calculator can give you a useful starting estimate, but your prescriber or a registered dietitian is the right person to advise on personal calorie targets.
GLP-1 medications can significantly reduce appetite, making it easy to eat too little overall — and protein is often the first macro to drop. Maintaining adequate protein intake helps preserve muscle mass during weight loss. Most general guidance suggests discussing a specific protein target with your healthcare professional.
You can enter your calorie and protein targets from a diet calculator into GLP Trackr, then log meals by AI photo scan, barcode, or search. The app tracks progress against your targets throughout the day, making it easy to stay consistent even when appetite is low.
Diet calculators produce estimates, not exact figures. Factors like metabolic rate, medication effects, and individual health conditions all affect your real needs. Use the number as a helpful guide and review it with your prescriber or dietitian if you have specific health considerations.