Protein in Chicken Calculator

Why chicken breast is the gym staple

Chicken breast is one of the highest-protein, lowest-fat meat sources widely available. A 100g cooked grilled breast delivers about 31g of protein with only 3.5g of fat and 165 calories. The protein quality is excellent: it carries all 9 essential amino acids in proportions close to what people need, and it scores near the top of the DIAAS quality scale further down.

Compare to other common protein sources per 100g cooked:

Whitefish actually beats chicken slightly on protein density, but chicken wins on convenience, cost and consistency, which is why it dominates gym-diet culture.

Raw versus cooked weight, the big confusion

This trips up most beginners. Protein content per 100g is higher when cooked, not because the chicken has more protein, but because water has evaporated. A 200g raw chicken breast contains roughly the same total protein (44-46g) before and after cooking, but the cooked weight drops to ~140g, so the protein per gram of cooked weight is higher.

This means how you weigh matters:

• “200g cooked” = ~285g raw
• “200g raw” = ~140g cooked
• Supermarket breasts vary from about 170g raw to well past 300g for the big US ones, so weigh rather than count

The label on a pack of raw chicken describes it raw. A recipe’s or a restaurant’s figure is usually for the cooked meat, and tracking apps list both, often under similar names. Mixing them is where the confusion in calorie and macro tracking comes from. Pick one approach and stick with it.

Protein per 100g cooked weight by method

Why fried chicken is the outlier

Fried chicken’s protein density drops to 24 g/100g against 31 g/100g for grilled, a 23% reduction. Breading and absorbed oil add mass and calories without adding meaningful protein.

Take a KFC Original Recipe breast, about 160 g:

That is 11 g less protein for 136 more calories, from the same weight of food. Not something to worry about if you are not tracking. Brutal if you are. The protein and calorie rows come from the per-100g densities above, so the calculator reproduces them exactly; the fried fat and carbs are KFC’s published figures for the piece.

Daily protein math

For people who lift, the best single figure comes from a 2018 meta-analysis by Morton and colleagues: muscle gains stopped improving at about 1.6 g per kg of body weight a day, with the top of their estimate at 2.2 g. Each row below names where its number comes from.

For a 75 kg active adult targeting 2.0 g/kg = 150g protein/day. Translating to chicken:

• 150g protein ÷ 31g protein per 100g cooked = 484g cooked chicken
• That’s roughly 3-4 medium chicken breasts per day
• Or 2 large + Greek yogurt + eggs for variety

Protein quality and DIAAS

The newer metric for protein quality is DIAAS (Digestible Indispensable Amino Acid Score), where 100 means the protein covers every essential amino acid an older child needs, after digestion. The figures below come from digestion studies in rats and pigs, because the measurement cannot be made in people; the whey, soy, pea and rice rows are Rutherfurd and colleagues (2015).

Animal proteins generally score higher. Plant-based eaters can make up the gap by combining sources, rice with beans or peas being the classic pair, since each fills in the amino acid the other is short of.

Storage and safety

Raw chicken safety basics:

• Refrigerate at ≤4°C (40°F); use within 1-2 days of purchase
• Freeze for longer storage: the USDA gives about a year for a whole bird and 9 months for pieces. Those are quality limits; chicken held at -18°C (0°F) stays safe indefinitely
• Thaw in the fridge (allow a day or two for a pack of breasts) or in cold water in a sealed bag, changing the water every 30 minutes (a 1 lb pack takes about an hour); never on the counter
• Cook to internal temperature 74°C (165°F), measured with a meat thermometer
• Salmonella and Campylobacter are the main risks, and chicken is one of the leading sources of both
• Cross-contamination matters: wash hands, surfaces, and utensils after raw chicken contact

Cooked chicken storage:

• Refrigerate within 2 hours of cooking (1 hour if room is >32°C)
• Use within 3-4 days
• Freeze for 2 to 6 months

Cost comparison (rough 2024 US prices)

Per 100g of protein delivered, approximate and moving every year:

Chicken breast is in the sweet spot of affordability + quality + convenience. Eggs and whey are cheaper per gram of protein, but you can only eat so many eggs.

Practical batch cooking

A typical gym-goer’s prep:

• Buy 1-1.5 kg raw chicken breasts ($8-15)
• Marinate or season
• Bake at 200°C (400°F) for 20-25 minutes (depending on thickness)
• Slice into portions; refrigerate or freeze
• Yields 700-1,000g cooked chicken = roughly 200-310g protein over 4-5 meals

The “Sunday meal prep” routine reliably produces 4-5 days of high-protein meals from a single cooking session.