Protein Calculator
If you’re trying to lose fat or build muscle and keep wondering “How many grams of protein should I hit each day?” this calculator turns your body weight into a clear daily protein target (with the exact g/lb ratio it’s using). It also shows a simple per?meal number and lets you fine?tune the recommendation with an activity multiplier if your training or recovery demands more.
Your Information
Your Daily Protein Requirements
Daily Protein Requirement
128 g per day
Based on 180 lbs, 0.80 g/lbWeekly Protein
894 g per week
Total weekly intakeProtein Calories
511 cal from protein
From 128 g proteinPer Meal (4 meals)
32 g per meal
If split evenly across 4 mealsProtein by Goal Type
Based on your body weight of 180 lbs:
Weight Loss
180 g/day
1.0g per lb
Maintenance
144 g/day
0.8g per lb
Muscle Gain
216 g/day
1.2g per lb
Common Protein Sources
Here are some common foods to help you reach your 128g daily protein target:
Animal-Based
- Chicken Breast: 31g protein per 100g
- Salmon: 25g protein per 100g
- Eggs: 6g protein per egg
- Greek Yogurt: 10g protein per 100g
- Cottage Cheese: 11g protein per 100g
Plant-Based
- Lentils: 9g protein per 100g
- Chickpeas: 8g protein per 100g
- Peanut Butter: 25g protein per 100g
- Tofu: 15g protein per 100g
- Almonds: 21g protein per 100g
Related Tools
Explore these additional calculators to optimize your nutrition:
Related Articles
Helpful guides for hitting your protein targets:
Understanding Protein and Daily Requirements
What This Protein Target Builder Outputs
This page is built to help you pick a g/lb protein strategy and immediately see the grams you need each day. It uses your goal, activity level factor, and optional adjustment slider to produce targets you can actually meal-plan.
- Daily protein grams based on weight × your selected g/lb method
- Effective g/lb reference (the ratio you’re following after your selections)
- Per-meal split (4-meal estimate) for an easy daily structure
- Weekly total + protein calories for planning and context
For formulas and assumptions used across calculators, see: Calculator Methodology.
How Protein Calculations Work
Protein Per Pound Formula
Protein needs are calculated based on body weight using grams per pound (g/lb):
Daily Protein (g) = Body Weight (lbs) × Protein per Pound (g/lb)
Example: 180 lbs × 0.8 g/lb = 144g daily protein
Protein Per Pound by Goal
Different fitness goals require different protein amounts:
- Weight Loss: 1.0g per pound - Preserves muscle during calorie deficit
- Maintenance: 0.8g per pound - Sustains current muscle mass
- Muscle Gain: 1.2g per pound - Supports new muscle growth
- Aggressive Bulking: 1.2g+ per pound - Maximum muscle building
- Cutting/Competition: 1.0-1.2g per pound - Preserve muscle while losing fat
Calories from Protein
Protein provides 4 calories per gram:
Protein Calories = Daily Protein Grams × 4
Example: 144g × 4 = 576 calories from protein
Example Protein Calculations
Example 1: Weight Loss Goal, 180 lbs
Inputs:
- Body Weight: 180 lbs
- Goal: Weight Loss
- Protein per Pound: 1.0g (preserve muscle)
Calculations:
- Daily Protein: 180 × 1.0 = 180g
- Protein Calories: 180 × 4 = 720 calories
- Weekly Protein: 180 × 7 = 1,260g
- Per Meal (4 meals): 180 ÷ 4 = 45g per meal
Result: Eat 180g protein daily (45g per meal) to preserve muscle while losing weight
Example 2: Muscle Gain Goal, 200 lbs
Inputs:
- Body Weight: 200 lbs
- Goal: Muscle Gain
- Protein per Pound: 1.2g (support growth)
Calculations:
- Daily Protein: 200 × 1.2 = 240g
- Protein Calories: 240 × 4 = 960 calories
- Weekly Protein: 240 × 7 = 1,680g
- Per Meal (4 meals): 240 ÷ 4 = 60g per meal
Result: Eat 240g protein daily (60g per meal) to maximize muscle growth
Example 3: Maintenance Goal, 160 lbs
Inputs:
- Body Weight: 160 lbs
- Goal: Maintenance
- Protein per Pound: 0.8g (maintain)
Calculations:
- Daily Protein: 160 × 0.8 = 128g
- Protein Calories: 128 × 4 = 512 calories
- Weekly Protein: 128 × 7 = 896g
- Per Meal (4 meals): 128 ÷ 4 = 32g per meal
Result: Eat 128g protein daily (32g per meal) to maintain current physique
How to Use The Protien Calculator
Step 1: Enter your body weight (this sets the baseline math)
Start with your body weight in pounds. Everything this page outputs (daily grams, weekly total, per-meal split) is built from weight × your chosen g/lb ratio.
Step 2: Pick a goal to auto-select a starting protein strategy
Use the goal buttons to choose why you’re increasing protein. On this page, the goal choice automatically changes the Protein Method (the g/lb ratio used for the calculation), so you don’t have to guess a number.
Step 3: Choose your activity level (this is a separate multiplier)
Select the activity level that best matches your typical week. This page applies an activity factor on top of your g/lb method so the same body weight can land on a higher or lower daily protein target.
Step 4: Decide whether to use a preset method or a custom g/lb ratio
Open Protein Method and choose a preset (Light/Moderate/Intense/Aggressive/Cutting) if you want a standard g/lb ratio, or pick Custom g/lb if you already know the exact ratio you want to follow.
Step 5: Use the adjustment slider only for personal fine-tuning
The Activity Multiplier Adjustment slider is a final “nudge” after the activity level and method are applied. Use it if you consistently recover poorly, train harder than your activity label suggests, or want to slightly relax the target without changing methods.
Step 6: Turn the result into a plan you can actually follow
In the results panel, use three numbers together:
- Daily grams: your main target to hit.
- Per-meal grams (4 meals): a simple way to distribute protein instead of saving it all for dinner.
- g/lb shown under the result: confirms the exact ratio you’re following after your selections.
Common Questions About Protein
Q: Why is protein so important?
Protein is essential for building and repairing muscles, producing hormones and enzymes, and supporting immune function. During weight loss, adequate protein preserves muscle. During muscle gain, protein provides amino acids for new muscle growth.
Q: How should I distribute protein throughout the day?
Distribute protein evenly across meals (15-40g per meal) to optimize muscle protein synthesis throughout the day. Include protein at every meal and snack. Post-workout meals are especially important - consume 20-40g within 2 hours after training.
Q: What if I can't reach my protein target with food?
Protein supplements (protein powder, protein bars) are convenient options. Whey, casein, and plant-based protein powders all work well. However, whole food sources are preferable when possible for nutrients and satiety.
Q: Is there an upper limit to safe protein intake?
Protein up to 2.2g per pound is generally safe for healthy individuals. Very high intakes may stress kidneys in susceptible individuals, but most people tolerate high protein well. Ensure adequate water intake and overall balanced nutrition.
Q: Animal or plant-based protein - which is better?
Both are valuable. Animal sources (chicken, fish, eggs, dairy) are typically more protein-dense and contain all amino acids. Plant sources (lentils, beans, tofu, nuts) provide fiber and phytonutrients. Combining both provides nutritional variety and benefits.
Q: Does protein need change if I'm not exercising?
Sedentary individuals need less protein (~0.6g per pound), while active individuals need more (~1.0-1.2g per pound). This is because exercise increases muscle protein turnover. Even non-exercisers need adequate protein for basic body functions.
Q: When should I recalculate my protein needs?
Recalculate when your body weight changes significantly (5+ pounds), your activity level changes, or your fitness goals shift. As you lose or gain weight, your absolute protein needs (in grams) will change.
Q: Does timing of protein consumption matter?
Total daily protein is most important. That said, post-workout protein is beneficial - consume 20-40g within 2 hours after exercise. For general health, spacing protein throughout the day is better than consuming it all at once.
Tips for Meeting Your Protein Goals
High-Protein Food Strategies:
- Include protein at every meal and snack
- Start breakfast with eggs or Greek yogurt
- Add protein powder to smoothies
- Include lean meats at lunch and dinner
- Snack on Greek yogurt, nuts, or cheese
- Use protein-rich dressings and sauces
Tracking and Consistency:
- Track protein intake daily with an app
- Weigh food initially to learn portions
- Aim to hit your target ±5-10g
- Meal prep high-protein meals
- Stock your pantry with protein sources
- Adjust recipes to add protein
Quick Reference
Protein per Pound by Goal:
- Weight Loss: 1.0 g/lb
- Maintenance: 0.8 g/lb
- Muscle Gain: 1.2 g/lb
Activity Level Adjustments:
- Sedentary: 0.6 g/lb
- Light: 0.7 g/lb
- Moderate: 0.8-0.9 g/lb
- Very Active: 1.0 g/lb
- Extremely Active: 1.1-1.2 g/lb
Key Facts:
- Protein: 4 cal/gram
- Safe max: 2.2 g/lb
- Per meal: 15-40g
- Post-workout: 20-40g
Top Protein Sources
Animal-Based (per 100g):
- Chicken: 31g
- Salmon: 25g
- Cottage Cheese: 11g
- Greek Yogurt: 10g
- Eggs: 13g (per 100g)
Plant-Based (per 100g):
- Peanut Butter: 25g
- Almonds: 21g
- Tofu: 15g
- Lentils: 9g
- Chickpeas: 8g
Example Targets
Weight Loss (180 lbs):
180g/day (1.0 g/lb)
Maintenance (180 lbs):
144g/day (0.8 g/lb)
Muscle Gain (180 lbs):
216g/day (1.2 g/lb)
Important Tips
Consistency Matters
Daily consistency is more important than perfection.
Total Daily Intake
Total daily protein matters most, not specific timing.
Include Variety
Mix animal and plant sources for complete nutrition.