Daily Protein Needs Calculator Formula
Understand the math behind the daily protein needs calculator. Each variable explained with a worked example.
Formulas Used
Daily Protein
daily_protein_g = weight_lbs * activity_factorCalories from Protein
calories_from_protein = weight_lbs * activity_factor * 4Variables
| Variable | Description | Default |
|---|---|---|
weight_lbs | Body Weight(lbs) | 170 |
activity_factor | Activity Level | 0.8 |
How It Works
How Daily Protein Needs Are Calculated
Protein requirements depend on your body weight and how physically active you are.
Formula
Daily Protein (g) = Body Weight (lbs) x Activity Factor
| Activity Level | Factor | |---|---| | Sedentary | 0.6 g per lb | | Moderate | 0.8 g per lb | | Active / muscle gain | 1.0 g per lb | | Intense training | 1.2 g per lb |
Each gram of protein provides 4 calories.
Worked Example
A moderately active person weighing 170 lbs.
weight_lbs = 170activity_factor = 0.8
- 01Daily protein = 170 x 0.8 = 136 g
- 02Calories from protein = 136 x 4 = 544 kcal
Ready to run the numbers?
Open Daily Protein Needs Calculator