Free fitness tool
Use this AI protein calculator to estimate daily protein and per-meal targets, then connect them to meals, macros, and training in ZenFit AI.
Enter the basics that shape this estimate, then use the interactive calculator after the app loads to adjust the numbers.
body weight
goal
meals per day
This output is useful for planning, not for diagnosis or guaranteed results.
This output is useful for planning, not for diagnosis or guaranteed results.
This output is useful for planning, not for diagnosis or guaranteed results.
Multiplies body weight in kilograms by a transparent 1.4-2.0 g/kg planning range for healthy active adults, narrowed by goal. The range follows sports-nutrition guidance for exercising adults; it is not the population RDA, a medical prescription, or appropriate for every health context.
The estimate should be compared with real-world outcomes over time. Body weight trends, training performance, hunger, schedule, sleep, injury status, and consistency can all change what works in practice.
These references support the general method, not an individual prescription.
This tool is for general fitness education and planning context. It is not medical advice. If you are pregnant, managing a medical condition, recovering from an injury, changing medication, or unsure whether a calorie or training change is appropriate, speak with a qualified clinician.
Next step
Use the quiz to connect this tool's estimate to workouts, meals, progress tracking, and AI coach context around your real week.
Many active adults use a range based on body weight and goal. Treat the output as a planning range, not a medical prescription.
For adherence and meal planning, many people do better spreading protein across the day instead of saving most of it for one meal.
Yes. Paid ZenFit AI meal features can generate meals and recipes around your targets and preferences.
The public tool gives a transparent protein range, then ZenFit AI can connect that target to your quiz context, meals, macros, workouts, and coach guidance.
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