Protein intake Calculator

How Much Protein Do You Need Daily?

Most people either eat too little or guess randomly. This free protein intake calculator gives you a clear, science-based recommendation in seconds — based on your body weight and activity level.

Simply enter your weight (in kg or lbs) and select how active you are. You’ll instantly see how many grams of protein you should aim for every day.

How the Protein Calculator Works

Our calculator uses widely accepted sports nutrition guidelines:

• Lightly active → 1.2 g of protein per kg of body weight
• Moderately active → 1.6 g of protein per kg of body weight
• Very active → 2.0 g of protein per kg of body weight

These numbers come from research by organizations like the International Society of Sports Nutrition (ISSN) and are commonly used by coaches, dietitians, and athletes.

What the activity levels mean:

• Lightly active: 1–3 light workouts per week or mostly desk work
• Moderately active: 3–5 moderate workouts per week
• Very active: 5–7 intense workouts or a physically demanding job

Why Getting Your Protein Right Matters

Protein is essential for:

• Building and maintaining muscle
• Recovering after training
• Feeling fuller for longer (helpful for fat loss)
• Supporting a healthy metabolism
• Preserving muscle as you age

Eating too little protein can slow recovery and make it harder to build or keep muscle. Eating the right amount makes almost every fitness goal easier.

How to Use the Results

Once you get your number:

1. Spread your protein across 3–5 meals during the day
2. Prioritize high-quality sources (meat, fish, eggs, dairy, Greek yogurt, cottage cheese, whey, tofu, legumes)
3. Adjust slightly up or down based on your goals (muscle gain, fat loss, or maintenance)

Important: This calculator gives a solid general recommendation. Individual needs can vary depending on age, goals, and health conditions. When in doubt, consult a doctor or registered dietitian.

Frequently Asked Questions

How much protein do I need per day? It depends on your weight and activity level. Most active people need between 1.2 and 2.0 grams of protein per kilogram of body weight.

Is more protein always better? Not necessarily. Going significantly above 2.2 g/kg rarely provides extra benefits for most people and can displace other important nutrients.

Should I calculate protein based on total body weight or lean body mass? For simplicity and practicality, this calculator uses total body weight — the method used in most research and real-world coaching.

Can I use this calculator if I want to lose fat? Yes. Higher protein intake is especially helpful during fat loss because it helps preserve muscle and keeps you fuller.

Ready to calculate your protein needs?

Use the free tool above, get your personal number, and start optimizing your diet today.