Protein Intake Calculator
Find your daily protein target based on body weight, activity level, and goal.
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Example 1 — Metric
BMI = 70 ÷ (1.75 × 1.75) = 70 ÷ 3.0625 ≈ 22.9 — Normal weight
📘 What is the Protein Intake Calculator?
Protein needs vary considerably based on activity level and goal, far more than the flat 0.8g/kg RDA figure suggests — that number represents the minimum to avoid deficiency in a sedentary population, not the optimal intake for anyone training regularly. This calculator gives an activity- and goal-specific range instead.
⚙️ How Protein Intake is calculated
Why activity level changes the range so much
Sedentary individuals need only enough protein to prevent deficiency (0.8–1.0 g/kg), while active individuals and athletes benefit from substantially more (1.6–2.4 g/kg) to support muscle repair and adaptation from regular training.
Why goal adds a further adjustment on top of activity level
A fat-loss goal shifts the range upward by roughly 0.2 g/kg, since higher protein intake helps preserve muscle mass during a calorie deficit. A muscle-building goal shifts the upper end of the range higher as well, to support the additional protein synthesis muscle growth requires.
Why this differs slightly from the Macro Calculator
This calculator gives a protein target in grams per kilogram of bodyweight directly, independent of total calorie intake — useful when protein itself is your primary focus, rather than working from an overall macro percentage split.
Protein target
Grams/day = bodyweight (kg) × g/kg range (by activity level and goal)
🧮 Worked examples
Example — active, building muscle, 70kg
70kg person, active training level, goal of building muscle.
→ Target range: approximately 112–154 grams of protein per day
Example — sedentary, maintaining
Same 70kg bodyweight, but sedentary activity level and a maintenance goal.
→ Target range drops to approximately 56–70 grams per day — illustrating how much activity level alone shifts the requirement
💡 Original insights & how to use this calculator
Setting a concrete daily target rather than guessing
Many people underestimate their actual protein needs, particularly if they are training regularly — having a specific gram range removes the guesswork.
Spreading intake across the day
Distributing your daily target across 3–4 meals tends to support muscle protein synthesis more effectively than concentrating it into one or two large servings.
Adjusting as your goal changes
Recalculate when shifting between a fat-loss phase and a muscle-building phase, since the appropriate range genuinely shifts with the goal, not just bodyweight.
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💡 Expert tips
Spread protein intake across 3-4 meals rather than one large serving — this supports better muscle protein synthesis throughout the day.
❓ Common questions
How much protein do I need per day?
It depends on activity level and goals — roughly 0.8-1g/kg for sedentary individuals, up to 1.6-2.4g/kg for very active people or those building muscle.
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