The body absorbs protein by breaking it into amino acids in the gut, then gradually moving them through the intestinal wall into the bloodstream.

Body protein absorption rate describes how fast protein is digested and used from each meal over several hours.

A body weight protein intake calculator turns your weight and activity level into a clear daily protein target in grams.

A body weight and protein intake calculator turns your weight, goal, and activity level into a clear daily protein target in grams.

For body weight to protein intake for muscle gain, aim for about 1.6–2.2 grams of protein per kilogram of body weight each day.

Most adults can multiply body weight in kilograms by 0.8–1.2 to find daily grams of protein that match health and activity.

A body protein requirement calculator estimates your daily protein needs from weight, activity, and goals so you can plan steady, realistic meals.

Most adults need about 0.8–1.6 grams of protein per kilogram of body weight each day, with higher needs for active or older people.

This tool estimates daily protein needs for body recomposition so you can build muscle while trimming fat on the same scale weight.

For steady muscle gain, match protein intake for muscle gain to roughly 1.6–2.2 grams per kilogram of body weight each day.