Free nutrition calculators. Then the habit that hits them.

Five fast calculators for the numbers that matter: calories, macros, BMR, TDEE and protein. Built by the team behind Macroo, the AI calorie and macro tracker that keeps you accountable to those numbers, day after day.

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Macro Calculator

Get your personalised daily calories and macros, protein, carbs and fat in grams, based on your body, activity and goal. Then build the daily habit that actually hits them.

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TDEE Calculator

Find your Total Daily Energy Expenditure, the number of calories you burn in a day. It's the single most useful number for losing, gaining or maintaining weight, and the anchor for the daily habit that gets you there.

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BMR Calculator

Calculate your Basal Metabolic Rate, the calories your body burns at complete rest, using the three most trusted formulas side by side. It's the foundation of every target you'll hold yourself to.

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Calorie Calculator

Find out how many calories you should eat per day to lose weight, maintain, or build muscle, with a clear target for every goal, not just one number. Then build the daily habit of actually hitting it.

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Protein Calculator

Find how much protein you should eat per day to build muscle, lose fat or maintain, based on your bodyweight and goal, in grams you can actually plan around and hold yourself to.

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Why these calculators exist

Most nutrition calculators bury a simple answer under ads, email walls and upsells. These don't. Each one uses the same evidence-based formulas a coach would, Mifflin-St Jeor for BMR, standard activity multipliers for TDEE, and research-backed protein ranges, and gives you the number instantly, in metric or imperial.

They're also a logical first step before tracking. Run the calorie calculator to find your target, split it with the macro calculator, then use Macroo to actually hit those numbers day to day. Snap a photo or type a meal, keep your streak, and let daily check-ins hold you to the plan. Macroo is a commitment device for your nutrition: accountability that sticks, discipline made effortless. See how it fits your routine on the comparison hub.