Body recomposition means losing body fat while building muscle. Powder can make protein easier to fit into your day, but the daily target includes every protein source you eat. Resistance training supplies the muscle-building stimulus; a supplement fills a food gap. [1]
Find your daily protein target
Enter your weight and current situation for an adult planning estimate. The result includes food, drinks and powder together.
Estimated total from all foods
112.0–140.0 g protein / day
About 28.0–35.0 g per meal, if divided across four meals.
A distribution starting point: about 28.0 g per meal (0.4 g/kg).
A practical starting range within the ISSN exercise range and around Morton’s estimated muscle-gain breakpoint.
Planning estimate, not a medical prescription. Scaling total body weight can overestimate needs at high body-fat levels; seek individual advice at weight extremes.
How the calculator works
Jäger et al. (2017) [2] give 1.4–2.0 g/kg/day as sufficient for most exercising people. Morton et al. (2018) [1] estimated a breakpoint near 1.62 g/kg/day for further gains in fat-free mass with resistance training. Its 95% confidence interval was 1.03–2.20 g/kg/day; the breakpoint analysis had statistical uncertainty. The upper bound is not a universal requirement or a safety limit.
Our editorial planning ranges are 1.6–2.0 g/kg/day when starting training and 1.6–2.2 g/kg/day with training experience or during fat loss. These situation labels are practical applications of the evidence, not three groups directly tested by those papers. The fat-loss option does not calculate an optimal dieting dose; lean athletes may need individual guidance. [2]
Weight in kg = weight in lb × 0.45359237. Daily grams = kg × the selected range. Per-meal grams = daily grams ÷ four. Schoenfeld & Aragon (2018) [3] propose about 0.4 g/kg/meal across at least four meals to reach 1.6 g/kg/day; spreading 2.2 g/kg/day over four meals gives 0.55 g/kg/meal. We show one decimal place and calculate from unrounded values.
Compare protein powders by the actual serving
A scoop is not a fixed unit. These are three historical USDA SR Legacy records, shown in record-ID order. They describe specific database samples, not the typical composition of every powder in a category. Check the label of the product you use.
| Powder and scoop | Protein / scoop | Calories / scoop | Protein / 100 kcal |
|---|---|---|---|
| Beverages, Whey protein powder isolateUSDA scoop: 28.67 gFDC 173177 | Protein / scoop16.7 g | Calories / scoop103 kcal | Protein / 100 kcal16.2 g |
| Beverages, Protein powder whey basedStandardized scoop: 30 gFDC 173180 | Protein / scoop23.4 g | Calories / scoop106 kcal | Protein / 100 kcal22.2 g |
| Beverages, Protein powder soy basedUSDA scoop: 45 gFDC 173181 | Protein / scoop25.0 g | Calories / scoop175 kcal | Protein / 100 kcal14.3 g |
The isolate record lists three scoops as 86 g; one scoop is calculated as 86 ÷ 3 g. The whey-based record has no scoop measure (its USDA portion is 0.33 cup, 32 g), so we use an explicitly standardized 30 g scoop. The soy-based record lists one scoop as 45 g. Protein per 100 kcal = protein per 100 g ÷ kcal per 100 g × 100. Values are rounded only for display. Original USDA SR Legacy dataset [5].
The record named “Whey protein powder isolate” has less protein per 100 kcal than the whey-based record in this table. That is what these records report; a category name alone does not tell you a product’s protein concentration. This is a comparison of records, not a quality score.
What about casein or pea protein? The local SR Legacy and FNDDS archives contain no matching generic casein or pea protein-powder records, so we do not invent nutrition values for them. Use their actual product labels. USDA FNDDS archive [6].
Choosing the best protein powder for body recomposition
Start with the gap: how much protein do your usual meals provide, and how much is left to reach your target? Compare that gap with the product’s labeled serving, calories and ingredients. The powder’s calories count toward your daily intake. A higher protein-per-calorie value can help you compare labels, but does not establish superior muscle gain.
How to get enough protein at each meal
Use the per-meal estimate as a planning prompt: include a protein source at breakfast, lunch and dinner, then see whether another meal or snack helps close the gap. A shake is one option. The four-meal split comes from the distribution proposal, not a requirement to follow an exact schedule. [3]
For a 70 kg example, 0.4 g/kg is 28 g per meal. Four such meals add up to 112 g for the day. Count the protein already in your meals before deciding how much powder to add. [3]
How to lose fat and gain muscle
Who has more room for recomp?
The cited diets position stand describes muscle preservation, and in some studies muscle growth, during energy restriction in untrained people with obesity. It cautions that those findings cannot simply be extended to lean, trained people. Recomp is therefore a possibility, not a promised result; training status and starting body composition affect the context. Aragon et al. (2017) [4]
How to lose fat while gaining muscle: pair training with calories
Keep resistance training central: Morton’s evidence concerns protein alongside resistance exercise training, not protein powder on its own. The diets position stand identifies a sustained calorie deficit as the driver of fat loss and notes that slower weight loss can better preserve lean mass in leaner people. [1] [4]
Practical takeaway: use resistance training and sufficient total protein together, and avoid treating the fastest possible weight loss as the goal. The deficit that supports fat loss and the intake that supports muscle growth can compete; these papers do not provide one calorie deficit that guarantees both for everyone. This calculator estimates protein, not your calorie needs. [4]
Common questions
What is the best protein powder for body recomposition?
There is no single best powder in the cited evidence. Start with the gap between your food intake and daily protein target, then compare the protein, calories, ingredients and serving size on the actual product label. The USDA table describes records, not a brand ranking.
Do I need protein powder to lose fat and gain muscle?
No. The daily target includes protein from all foods and drinks. Powder is a convenient way to fill a gap; it does not replace resistance training or determine your energy balance.
Does protein above 1.6 g/kg per day go to waste?
No. Morton’s estimate describes average additional gains in fat-free mass during resistance training, not an absorption limit. Its breakpoint was about 1.62 g/kg/day, with a 95% confidence interval reaching 2.20 g/kg/day. Individual needs and dieting conditions vary.
Must I eat exactly four protein meals?
No. Four meals are the calculator’s planning assumption. Schoenfeld and Aragon proposed about 0.4 g/kg per meal across at least four meals for a daily total of 1.6 g/kg; this is a distribution strategy, not a rule that other meal patterns cannot work.
Sources and evidence
Original full texts and local USDA archives checked October 27, 2026.
- Morton et al. (2018). Protein supplementation and resistance training: systematic review, meta-analysis and meta-regression. NCBI official full-text XML.
- Jäger et al. (2017). ISSN position stand: protein and exercise. NCBI official full-text XML.
- Schoenfeld & Aragon (2018). How much protein can the body use in a single meal for muscle-building? NCBI official full-text XML.
- Aragon et al. (2017). ISSN position stand: diets and body composition. NCBI official full-text XML.
- USDA FoodData Central: SR Legacy CSV (April 2018 release). FDC 173177, 173180 and 173181; original per-100-g values and portion records.
- USDA FoodData Central: FNDDS 2021–2023 JSON (October 2024 release). Used to check available powder types.
General health information, not medical advice. This guide and calculator are for adults and have not been reviewed by a registered dietitian. If you have kidney disease or another medical condition, are pregnant, or have been advised to limit protein, consult your clinician before changing protein intake. Weight extremes and high body-fat levels need individual assessment.