Protein Intake Calculator

The RDA of 0.8 grams per kilogram of body weight is a floor set to prevent deficiency, not an optimal target. Most research supports more: roughly 1.2 to 1.6 g/kg for active adults or those losing weight, and 1.6 to 2.2 g/kg for building muscle with resistance training. For a 70 kg (154 lb) person that is about 85 to 155 grams a day depending on your goal. This calculator estimates your personal range from your weight, activity level, and goal.

It takes your body weight and applies a grams-per-kilogram range based on your activity level and goal. Sedentary maintenance sits near the RDA, while a calorie deficit or a muscle-building goal shifts the range higher to protect or grow lean muscle. If you are over 65 it nudges the target up, because older adults need more protein to counter age-related muscle loss.

When you eat in a calorie deficit, higher protein — often 1.4 to 2.0 g/kg — helps in two ways: it preserves the muscle you would otherwise lose, and it keeps you fuller so the deficit is easier to sustain. Protein is also the most thermogenic macronutrient, meaning your body burns slightly more digesting it than it does with carbs or fat.

For muscle growth, most evidence points to 1.6 to 2.2 g/kg of body weight per day, paired with progressive resistance training. Going much beyond 2.2 g/kg has not been shown to add more muscle. Just as important as the total is spreading it across the day — aiming for a meaningful dose of protein at each meal rather than loading it all at dinner.

There is no single official number, but protein plays a helpful role. Because it barely raises blood glucose, it lets you keep meals satisfying while moderating carbs, and eating it before your carbs blunts the post-meal spike. A common starting point is roughly 1.2 to 1.6 g/kg of body weight, favoring lean sources like fish, poultry, eggs, Greek yogurt, tofu, and legumes. This calculator nudges the range up slightly when you select a prediabetes or insulin resistance profile.

For most people with type 2 diabetes and normal kidney function, adequate protein — often around 1.2 to 1.6 g/kg — supports satiety and steadier glucose as carbs come down, without directly raising blood sugar much. The important exception is diabetic kidney disease (diabetic nephropathy): if you have reduced kidney function, protein may need to be limited, so set your target with your doctor or dietitian rather than pushing it higher.

Many people with PCOS have some degree of insulin resistance, so a higher-protein, lower-glycemic eating pattern is a common recommendation. Protein supports satiety, helps with body composition, and — paired with moderating refined carbs — steadies blood sugar and insulin. A moderate target of roughly 1.2 to 1.6 g/kg is a reasonable starting point for most.

For healthy people with normal kidney function, high-protein diets have not been shown to harm the kidneys. However, if you have chronic kidney disease, diabetic kidney disease, or are pregnant, your protein needs are different and should be set with your doctor. Very high intakes can also crowd out other foods, so balance still matters.

Protein has very little direct effect on blood glucose in most people — far less than carbohydrates. In fact, eating protein before or alongside carbs slows digestion and blunts the post-meal glucose spike. That is why a protein-first meal order is one of the simplest ways to steady your blood sugar, and it is exactly what GlucoSpike is built to help you see, meal by meal.