Free browser tools that respect your files β€” everything runs locally, nothing is uploaded.

Protein Calculator

Calculate your daily protein needs based on weight, activity level, and fitness goals. Get personalized recommendations for muscle building, fat loss, or maintenance.

Daily Protein

Recommended

100g

per day

Per Meal (4 meals)25g
Per kg Body Weight1.3g/kg
Protein Calories401 cal

Your Information

years

Activity Level

Base protein: 1.2-1.4g per kg body weight

Your Goal

Standard protein for weight maintenance

Your Protein Needs

Daily Protein Target

100g

Range: 93g - 108g per day

Per Meal (4x)

25g

Per kg

1.3g

Per lb

0.6g

Protein Calories

401

High Protein Foods

FoodServingProteinCalories
Chicken Breast4 oz (113g)26g120
Salmon4 oz (113g)23g180
Lean Beef4 oz (113g)28g180
Eggs2 large12g140
Greek Yogurt1 cup20g130
Cottage Cheese1 cup28g220
Tofu (firm)1/2 block20g180
Lentils1 cup cooked18g230
Whey Protein1 scoop25g120
Almonds1/4 cup8g200

Sample Meal Plan (100g protein)

Breakfast

3 eggs + Greek yogurt

25g

Lunch

Chicken breast + quinoa

30g

Dinner

Salmon + vegetables

30g

Snack

Protein shake or cottage cheese

15g

Daily Total

100g

Protein Guidelines

Goalg/kgg/lbNotes
Sedentary Adult0.80.36RDA minimum to prevent deficiency
Active Adult1.2-1.40.55-0.64Support for regular exercise
Fat Loss1.6-2.00.73-0.91Preserve muscle in deficit
Muscle Building1.6-2.20.73-1.0Maximize muscle protein synthesis
Older Adults (50+)1.0-1.20.45-0.55Counter anabolic resistance

Explore Protein Scenarios

Explore how changes affect your results

Your Protein Intake vs Population

Compared to the general population

Your Daily Protein

100 g

Percentile

54th

Above average - great job!

Distribution

You

10th

50

25th

70

Median

95

75th

130

90th

170

Your Ranking

Top 46%

46% are lower

Protein Optimization Tips

Based on your results

0/5 completed
πŸ₯— NutritionImportant

Daily Target

Your 100g daily protein equals 25g per meal across 4 meals. Spread intake evenly for optimal absorption and muscle protein synthesis.

πŸ₯— NutritionImportant

Protein Timing

Distribute protein evenly across meals. Each meal triggers muscle protein synthesis for 3-4 hours.

πŸ₯— NutritionRecommended

Best Sources

Prioritize complete proteins: chicken, fish, eggs, dairy, soy. Aim for 25-30g per serving to maximize muscle protein synthesis per meal.

Daily Protein

Recommended

100g

per day

Per Meal (4 meals)25g
Per kg Body Weight1.3g/kg
Protein Calories401 cal

Frequently Asked Questions

How much protein do I need per day?

The RDA is 0.8g per kg (0.36g/lb), but this is the minimum to prevent deficiency. Most active people need 1.2-2.0g per kg. Athletes building muscle may need up to 2.2g per kg. This calculator adjusts based on your activity level and goals.

Can I eat too much protein?

For healthy individuals, high protein intake (up to 2.2g/kg) is generally safe. However, very high intake may stress kidneys in those with existing kidney disease. There's also no benefit beyond ~1.6-2.2g/kg for muscle building. Extra protein is used for energy or stored as fat.

Does protein timing matter?

Distributing protein throughout the day (20-40g per meal) is optimal for muscle protein synthesis. Post-workout protein (within 2 hours) supports recovery but isn't as critical as once thought. Total daily intake matters more than exact timing.

What are complete vs incomplete proteins?

Complete proteins contain all 9 essential amino acids (meat, fish, eggs, dairy, soy, quinoa). Incomplete proteins are missing one or more (most plants). Vegetarians should eat varied protein sources throughout the day to get all amino acids.

Do older adults need more protein?

Yes, adults over 50 often need 1.0-1.2g per kg (vs 0.8g RDA) due to anabolic resistance - muscles respond less efficiently to protein. Combined with resistance exercise, higher protein helps prevent age-related muscle loss (sarcopenia).

How do I get enough protein without meat?

High-protein plant sources: legumes (lentils, chickpeas), tofu/tempeh, seitan, edamame, quinoa, nuts, seeds. Dairy: Greek yogurt, cottage cheese, milk. Many plant sources have 15-25g protein per serving. Combine throughout the day for complete amino acids.

Formula:
By Joseph OrdunaHow this works

How this works

Formulas are implementations of published clinical or public-health equations. Calculations run in your browser β€” no inputs are transmitted to our servers and no account is required. The result is informational; it does not diagnose, treat, or replace advice from a clinician.

What this tool can’t do

When to consult a professional

Talk to a licensed healthcare provider before using the output of this tool to make a medical decision, especially if you have an underlying condition, are pregnant, or are on medication that affects metabolism or fluid balance.

Sources

  1. [1]
    Centers for Disease Control and Prevention (CDC)
    Official sourcecdc.govAccessed Apr 21, 2026
  2. [2]
    National Institutes of Health (NIH)
    Official sourcenih.govAccessed Apr 21, 2026
Joseph Orduna
Founder & Software Engineer

Full-stack software engineer specializing in embedded systems, web architecture, and AI/ML. Founder of Practical Web Tools. Built the gesture-controlled drone IP acquired by KD Interactive (Aura Drone, sold on Amazon).