How Much Protein Do You Need Per Day? A Practical Calculation Guide

How much protein per day: protein-rich foods and a kitchen scale

The standard recommended dietary allowance for healthy adults is 0.8 grams of protein per kilogram of body weight per day. Active people and those building muscle often aim higher, commonly cited as roughly 1.2 to 2.0 g/kg. Check with a doctor or dietitian if you have kidney disease or a medical condition.

Quick formula

Protein (g) = body weight (kg) x target g/kg. Example: 70 kg x 0.8 = 56 g; 70 kg x 1.6 = 112 g.

Ranges by goal

Goalg per kg
General health0.8
Regular exercise1.2-1.6
Strength training1.6-2.0

Spreading it across the day

Splitting protein across 3-4 meals is a practical way to hit your number.

Related: Katch-McArdle formula and our BMR calculator.

FAQ

Is more protein always better?

No. Beyond a point extra protein adds little benefit; total calories and training matter too.

Can I get enough from plants?

Yes, with a varied diet of legumes, soy, grains and nuts.

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