What is the Protein Intake Calculator?
Estimate daily protein needs based on body weight and activity goal. Our health and fitness calculators use validated, published equations — such as Mifflin-St Jeor for metabolic rate and the U.S. Navy method for body fat — to give you a solid starting point for training and nutrition.
How to use the Protein Intake Calculator
- Enter your body weight, your goal.
- Results update automatically as you type; you can also press Calculate.
- Read the output: protein per day, per meal (4 meals), calories from protein.
- Use the 📊 chart to see the result visually, then copy or share it.
Formula and method
Worked example
With body weight = 75 kg, goal = Muscle building (1.6 g/kg), the Protein Intake Calculator returns protein per day: 120 g; per meal (4 meals): 30 g; calories from protein: 480 kcal.
Tips for better results
- Equations estimate population averages; your individual numbers may differ.
- Track trends over weeks rather than reacting to a single reading.
- Pair calculators with professional guidance for medical conditions, pregnancy or major diet changes.
⚠️ This tool provides general information and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified healthcare professional.
Frequently asked questions
What does the Protein Intake Calculator do?
Estimate daily protein needs based on body weight and activity goal.
How is it calculated?
The Protein Intake Calculator uses this method: Protein = body weight (kg) × grams per kg.
Can you show an example?
With body weight = 75 kg, goal = Muscle building (1.6 g/kg), the Protein Intake Calculator returns protein per day: 120 g; per meal (4 meals): 30 g; calories from protein: 480 kcal.
Is the Protein Intake Calculator accurate?
It uses standard published formulas and is tested against known values, but results are estimates for guidance. This tool provides general information and is not medical advice. It is not a substitute for diagnosis or treatment by a qualified healthcare professional.
Is this tool free and private?
Yes — the Protein Intake Calculator is completely free with no sign-up, and it runs entirely in your browser, so the values you enter are never uploaded to our servers.
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