Protein, carbs, fat — from a photo
Macro Calculator
Track your macros the easy way: photograph a meal and get protein, carbs, and fat estimated alongside its calories.
Calories tell you how much energy a meal carries; macros tell you what that energy is made of. Protein, carbohydrates, and fat each behave differently in the body, and many goals — building muscle, losing fat while staying full, fuelling training — depend on hitting the right split, not just a calorie total. This macro calculator estimates all three from a single photo of your plate, so you can track macros without weighing food or trawling a database.
That is the friction a macro calculator usually adds: every meal becomes several database lookups just to split out the grams. Reading the plate from a photo collapses that into one step, which makes hitting a daily protein or macro target realistic on a normal, busy day.
How macros are estimated from a photo
Snap one photo of your meal. The AI identifies the foods and estimates the portion from visual cues, then maps each item onto published nutrition reference values to break the meal into grams of protein, carbs, and fat, with a calorie figure to match. As with calories, the macro split is an honest estimate shown as a sensible range rather than a lab-exact number — portion size is judged from the image, not measured on a scale. Clear photos of a single plate give the most dependable breakdown.
Using macros toward your goal
Set a target — a common approach is to prioritise protein while keeping calories in check — and use each scan to see how the day is stacking up. Because the calculator reports macros per meal, you can adjust on the fly: light on protein by mid-afternoon, so dinner leans that way. Sign in to keep a running history and watch your daily protein, carb, and fat totals build; use it without an account for a quick single-meal check. The estimates are there to guide everyday choices, not to replace professional or medical advice, so treat consistency across the week as the real measure of success.
Choosing a macro split
There is no single correct ratio of protein, carbs, and fat — the right split follows your goal. People trying to hold onto muscle while losing fat often push protein higher, because it is filling and supports recovery. Endurance training tends to lean on carbohydrates for fuel, while some prefer a higher-fat pattern for steadier energy. Rather than chase a perfect formula, pick a target you can actually meet with the food you enjoy, then use the photo estimates to check whether real meals line up with it. The calculator makes that feedback fast: if protein keeps landing low by mid-afternoon, you can steer the next meal without spreadsheets. Grams are shown as honest ranges, so aim for the right ballpark meal after meal rather than obsessing over a single decimal. As always, the estimates inform your choices instead of dictating them, and a registered dietitian is the right call for targets tied to a medical condition or serious performance goal.
Frequently asked questions
- What does a macro calculator do?
- It breaks a meal into grams of protein, carbohydrates, and fat — the three macronutrients — alongside its calorie total, so you can track the composition of what you eat, not just the energy.
- How does it estimate macros from a photo?
- The AI detects the foods, estimates the portion from visual cues, and maps each item to USDA reference values to split the meal into protein, carbs, and fat.
- Is the macro calculator free?
- Yes. You can estimate a meal's macros from a photo with no account. A free account saves your scans so you can track daily macro totals over time.
- How accurate are the macro estimates?
- They are honest estimates shown as ranges rather than exact grams, since portion size is judged from the image. Track the trend across meals and days rather than any single figure.
- Can I track calories at the same time?
- Yes. Every scan returns calories together with the protein, carb, and fat breakdown, so you can manage a calorie budget and a macro target from the same photo.