Beans, lentils and soy

How much protein is in pinto beans?

A cup of boiled pinto beans has about 15 g of protein.

That's 9 g of protein per 100 g, or 6.3 g for every 100 calories.

Protein per serving

Protein and calories in common servings of pinto beans, from USDA data.
ServingWeightProteinCalories
1 cup171 g15 g245
½ cup86 g7.7 g122
100 g100 g9 g143

How pinto beans compares

Other beans, lentils and soy, ranked by how much protein you get per 100 calories.

FoodProtein per 100 gProtein per 100 calories
Tofufirm, made with calcium sulfate 17 g 12 g
Tempehuncooked 20 g 11 g
Soybeansboiled 18 g 11 g
Edamamefrozen, prepared 12 g 9.8 g
Lentilsboiled 9 g 7.8 g
Split peasboiled 8.3 g 7.1 g
Kidney beansboiled 8.7 g 6.8 g
Lima beansboiled 7.8 g 6.8 g
Black beansboiled 8.9 g 6.7 g
Green peasfrozen, boiled 5.2 g 6.6 g
Soy milkwith added calcium and vitamins 2.6 g 6 g
Navy beansboiled 8.2 g 5.9 g
Refried beanscanned 5 g 5.5 g
Chickpeasboiled 8.9 g 5.4 g
Baked beanscanned, vegetarian 4.8 g 5.1 g
Hummusstore-bought 7.4 g 3.2 g

How it fits into a meal

For building muscle, Schoenfeld and Aragon's 2018 review of the research suggests about 0.4 g of protein per kilogram of body weight at each meal, spread over at least four meals a day. At 170 lb (77 kg), that's about 31 g a meal. A cup of boiled pinto beans covers about 50% of that.

Work out your own daily and per-meal target with the protein calculator.

Nutrition data: USDA FoodData Central ("Beans, pinto, mature seeds, cooked, boiled, without salt", FDC ID 175200). Actual values vary by brand, recipe and cooking method, so treat these numbers as close estimates.