Home/Tools/Macro Scanner

Macro Scanner: Macros from a Photo

Paul Hummel Last reviewed October 6, 2026 3 min read
The photo is sent encrypted to OpenAI for analysis and is not stored by us. More in the privacy policy.
Analyzing…

0kcal
0 gCarbs0 %
0 gProtein0 %
0 gFat0 %
Servings
1
Ingredients

    ✓ Save in the app
    Track every meal with daily targets and history: in the GymLog AI app.
    You have used your free scans.

    Keep scanning in the GymLog AI app – with daily targets and history.

    Get the app for free →
    Quick answer

    Besides calories, the scanner estimates protein, carbs and fat in grams from a photo and shows the share of calories each macronutrient contributes.

    How the macro shares are calculated

    The percentages under protein, carbs and fat show their share of the meal's energy, using the general Atwater factors described by the FAO (2003): 4.0 kcal per gram of protein and carbohydrate, 9.0 kcal per gram of fat. That makes it easy to see whether a meal is protein-, carb- or fat-heavy.

    Who benefits from macros by photo

    People building muscle usually focus on protein per meal. A photo scan quickly shows whether a meal delivers a lot or little protein. Daily protein recommendations are covered in the protein guide.

    Macros from a photo are estimates. Fat carries the most uncertainty, because oil and butter are barely visible in pictures.

    Track every meal in seconds

    GymLog AI logs meals via photo, voice or chat – with daily targets for calories and macros.

    Download on the App StoreGet it on Google Play

    Related questions

    Sources

    1. Shonkoff, E., Cara, K. C., Pei, X. A., et al. (2023). AI-based digital image dietary assessment methods compared to humans and ground truth: a systematic review. Annals of Medicine, 55(2), 2273497. PubMed
    2. Food and Agriculture Organization of the United Nations (FAO) (2003). Food energy – methods of analysis and conversion factors. FAO Food and Nutrition Paper 77, Kapitel 3. fao.org
    Results are AI estimates and may deviate considerably. They are not a substitute for nutritional advice. If you have a medical condition, allergies or an eating disorder, please consult a professional.