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Protein calculator: how much protein do I need?

How much protein you need depends on your weight and what you are working on. Enter both to get a daily range in grams and how much to aim for at each meal.

1Your weight
2What are you working on?
3Meals a day

Your daily protein

142 ga day, inside a 120 to 165 g range

Each meal36 g
Per kg of body weight1.6 to 2.2 g
Calories from protein569 kcal

That is about 2.5 cooked chicken breasts worth of protein, spread over the day

Your daily protein150 g

Example shown: 165 lb, building muscle, 4 meals. For healthy adults; ask your doctor if you have kidney disease.

Protein ranges by goal

GoalGrams per kg a dayGrams per lb a dayWhere it comes from
General health, mostly sitting0.80.36US Recommended Dietary Allowance
Healthy aging, over 651.0 to 1.20.45 to 0.55PROT-AGE study group
Active1.4 to 2.00.64 to 0.9ISSN position stand
Build muscle1.6 to 2.20.7 to 1.0Morton et al. meta-analysis, ISSN
Lose fat and keep muscle1.6 to 2.40.7 to 1.1Our range: Morton plus the higher intakes ISSN describes for a calorie deficit

Why protein matters for your goal

  • Losing weight: more protein helps you keep muscle while you eat less, and it keeps you fuller than the same calories from carbs or fat.
  • Building muscle: a large meta-analysis found gains in muscle level off at about 1.6 g per kg a day, with some people benefiting up to 2.2 g.
  • Getting older: muscle loss speeds up after 60, and older adults need more protein than the RDA to keep it.

What 30 g of protein looks like

FoodAmount for about 30 g protein
Chicken breast, cookedabout 100 g (3.5 oz)
Greek yogurt, plain nonfatabout 300 g (1¼ cups)
Eggs5 large
Canned tuna, drainedabout 120 g (1 can)
Firm tofuabout 175 g (6 oz)
Lentils, cookedabout 330 g (1⅔ cups)

Approximate values from USDA FoodData Central; brands vary.

Hit your number without the math

Knowing your target is easy. Hitting it every day is the hard part. EXO counts protein from a photo of each meal and shows how much is left for the day, so you know at dinner whether you are short.

Sources

  1. Institute of Medicine. Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids. National Academies Press, 2005. National Academies Press
  2. Bauer J, Biolo G, et al. Evidence-based recommendations for optimal dietary protein intake in older people: a position paper from the PROT-AGE Study Group. Journal of the American Medical Directors Association, 2013;14(8):542-559. PubMed · doi:10.1016/j.jamda.2013.05.021
  3. Morton RW, Murphy KT, et al. A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength. British Journal of Sports Medicine, 2018;52(6):376-384. PubMed · doi:10.1136/bjsports-2017-097608
  4. Jäger R, Kerksick CM, et al. International Society of Sports Nutrition position stand: protein and exercise. Journal of the International Society of Sports Nutrition, 2017;14:20. PubMed · doi:10.1186/s12970-017-0177-8
  5. Schoenfeld BJ, Aragon AA. How much protein can the body use in a single meal for muscle-building? Journal of the International Society of Sports Nutrition, 2018;15:10. PubMed · doi:10.1186/s12970-018-0215-1
  6. US Department of Agriculture. FoodData Central. fdc.nal.usda.gov

Frequently asked questions

How much protein do I need a day?
The US RDA is 0.8 g per kg of body weight (about 0.36 g per lb) for adults who mostly sit. People who exercise do better with 1.4 to 2.0 g per kg, and people trying to build muscle with about 1.6 to 2.2 g per kg.
Is too much protein bad for you?
For healthy adults, intakes up to about 2.2 g per kg a day have not shown harm in studies. People with kidney disease should follow their doctor's advice on protein.
Should I use my current weight or goal weight?
Use your current weight if you are within a healthy range. If you have a lot of weight to lose, using your goal weight gives a more realistic number.
How much protein can my body use in one meal?
There is no hard limit, but spreading protein over 3 to 5 meals of about 0.4 g per kg each (often 25 to 40 g) works well for building and keeping muscle.