Protein Calculator
Free Protein Calculator for health & fitness. Enter your measurements for personalized results with clear explanations and reference ranges.
Formula
Protein (g) = Body Weight (kg) × Multiplier
Multiply your body weight by a factor based on your goal: 0.8 for minimum, 1.2-1.4 for active, 1.6-2.2 for muscle building.
Worked Examples
Example 1: Active Adult
Problem:75kg person with active lifestyle wants to know protein needs.
Solution:Active lifestyle range: 1.2-1.4 g/kg\n\nMinimum: 75 × 1.2 = 90g\nMaximum: 75 × 1.4 = 105g\nRecommended: 75 × 1.3 = 98g\n\nMeal distribution (3 meals):\n98 ÷ 3 = 33g per meal\n\nExample day:\nBreakfast: 3 eggs + Greek yogurt = 30g\nLunch: Chicken salad = 35g\nDinner: Salmon + legumes = 35g
Result:90-105g daily (aim for ~98g)
Example 2: Muscle Building
Problem:80kg male focused on gaining muscle.
Solution:Muscle building range: 1.6-2.2 g/kg\n\nMinimum: 80 × 1.6 = 128g\nMaximum: 80 × 2.2 = 176g\nRecommended midpoint: 80 × 1.9 = 152g\n\nMeal distribution (4 meals):\n152 ÷ 4 = 38g per meal\n\nThis keeps intake within the evidence-based range for muscle protein synthesis.
Result:128-176g daily (recommended ~152g)
Example 3: Weight Loss
Problem:65kg female on calorie deficit for weight loss.
Solution:Weight loss range: 1.2-1.6 g/kg\n(Higher end helps preserve muscle)\n\nMinimum: 65 × 1.2 = 78g\nRecommended midpoint: 65 × 1.4 = 91g\nMaximum: 65 × 1.6 = 104g\n\nAt 1400 calories:\n91g protein = 364 calories\n= 26% of total calories\n\nThis supports satiety and helps preserve lean mass while dieting.
Result:78-104g daily (recommended ~91g)
Frequently Asked Questions
How much protein do I need daily?
The RDA minimum is 0.8g/kg body weight for sedentary adults. However, research suggests active individuals benefit from 1.2-2.0g/kg. For muscle building, aim for 1.6-2.2g/kg. For weight loss, 1.2-1.6g/kg helps preserve muscle. Individual needs vary based on activity, age, and goals.
Can I eat too much protein?
For healthy individuals, high protein intake (up to 2.2g/kg or higher) shows no adverse effects in research. Concerns about kidney damage apply only to those with pre-existing kidney disease. Very high protein (3g/kg+) provides no additional muscle-building benefit and is unnecessary. Moderation is reasonable.
What are the best protein sources?
Complete proteins with all essential amino acids: meat, fish, eggs, dairy, soy. High-quality plant combinations: rice+beans, hummus+pita. Per serving leaders: chicken breast (31g/100g), Greek yogurt (10g/100g), eggs (6g each), tofu (8g/100g), lentils (9g/100g cooked).
Does protein timing matter?
Somewhat. Distributing protein evenly across meals (25-40g per meal) optimizes muscle protein synthesis better than one large dose. Post-workout protein (within 2-3 hours) supports recovery. However, total daily intake matters most - timing is secondary optimization.