Question 1

How much protein should I eat per day?

Accepted Answer

Most active adults need roughly 1.2-2.2 grams of protein per kilogram of body weight per day, depending on training goals, with higher amounts for muscle gain or fat loss while preserving muscle.

Question 2

How much protein do I need to build muscle?

Accepted Answer

Research generally supports 1.6-2.2 grams of protein per kilogram of body weight per day for maximizing muscle growth with resistance training, with limited extra benefit beyond that range.

Question 3

Do I need more protein when losing fat?

Accepted Answer

Yes. Higher protein intake, often 1.8-2.7 g/kg, helps preserve lean muscle mass during a calorie deficit, which is especially important when body fat percentage is already low.

Question 4

What is the RDA for protein?

Accepted Answer

The RDA (Recommended Dietary Allowance) is 0.8 grams of protein per kilogram of body weight per day, which is a minimum to prevent deficiency rather than an optimal intake for active individuals.

Question 5

Should I calculate protein based on body weight or lean body mass?

Accepted Answer

Lean body mass is more accurate for people with higher body fat percentages, since muscle tissue — not fat — is what actually uses dietary protein for repair and growth.

Question 6

How much protein should I eat per meal?

Accepted Answer

Roughly 0.3-0.5 grams of protein per kilogram of body weight per meal, spread across 3-5 meals a day, appears to optimize muscle protein synthesis throughout the day.

Question 7

Is there an upper limit to how much protein I can use?

Accepted Answer

Beyond roughly 2.2 g/kg for muscle building or 2.7 g/kg during a fat loss phase, additional protein generally provides diminishing returns for muscle retention or growth.

Question 8

Is too much protein bad for my kidneys?

Accepted Answer

For people with healthy kidney function, higher protein intakes used in sports nutrition research have not been shown to cause kidney damage, though those with existing kidney disease should follow medical advice.

Question 9

Do I need more protein as a vegetarian or vegan?

Accepted Answer

Plant proteins are often slightly less complete or digestible than animal proteins, so vegetarians and vegans may benefit from aiming toward the higher end of their target range and eating a variety of protein sources.

Question 10

Does protein timing matter?

Accepted Answer

Total daily protein intake matters most, but spreading protein evenly across meals and including some protein after training may offer a modest additional benefit for muscle building.

Question 11

How does activity level affect protein needs?

Accepted Answer

More active individuals, especially those doing regular resistance or endurance training, need more protein than sedentary people to support muscle repair and adaptation.

Question 12

Do older adults need more protein?

Accepted Answer

Yes. Older adults often benefit from higher protein intakes, around 1.0-1.2 g/kg or more, to help counteract age-related muscle loss (sarcopenia).

Question 13

Can eating more protein help with weight loss?

Accepted Answer

Higher protein diets tend to increase satiety and preserve lean mass during a calorie deficit, which can support weight loss efforts even though protein itself doesn't burn fat directly.

Question 14

What foods are high in protein?

Accepted Answer

Chicken breast, fish, eggs, Greek yogurt, cottage cheese, lean beef, tofu, lentils, beans, and whey or plant-based protein powders are all concentrated protein sources.

Question 15

Does this calculator account for endurance athletes?

Accepted Answer

Yes, endurance training is included as a goal option, using a slightly lower protein range than muscle-building goals since the primary demand is different.

Question 16

Why do protein recommendations come as a range rather than one number?

Accepted Answer

Individual protein needs vary with training experience, diet quality, and genetics, so research-based ranges give a safer, more realistic target than a single fixed number.

Question 17

How often should I recalculate my protein target?

Accepted Answer

Recalculate whenever your body weight, body fat percentage, or training goal changes meaningfully, similar to how often you'd reassess your TDEE.

Question 18

Does protein count toward my total daily calories?

Accepted Answer

Yes, protein provides 4 calories per gram, the same as carbohydrates, so your protein target should be planned alongside your overall TDEE and macro split.

Goal	g/kg Body Weight	g/kg Lean Body Mass
Sedentary / Minimal Activity	0.8-1.0	1.0-1.2
General Health / Maintenance	1.0-1.2	1.2-1.6
Endurance Training	1.2-1.6	1.6-2.0
Muscle Gain	1.6-2.2	2.3-3.1
Fat Loss (Preserve Muscle)	1.8-2.7	2.3-3.1

Food	Protein
Chicken breast (cooked)	31g
Greek yogurt (plain)	10g
Eggs (whole)	13g
Salmon (cooked)	25g
Lean beef (cooked)	26g
Tofu (firm)	17g
Lentils (cooked)	9g
Cottage cheese	11g
Whey protein powder	~80g

Protein Calculator (2026)

How Daily Protein Needs Are Calculated

Protein Ranges by Goal

Protein-Rich Food Sources (per 100g)

Factors That Affect Protein Needs

Related Calculators

Scientific References

Protein Calculator — Frequently Asked Questions