Protein Intake Calculator
Multiplies your body weight in kg by a grams-per-kg factor chosen from your activity level (0.8 to 2.0 g/kg) to give a daily protein target in grams, rounded to whole grams.
What this calculator does
The Protein Intake Calculator estimates your result instantly from the values you enter, using standard health & fitness formulas. Multiplies your body weight in kg by a grams-per-kg factor chosen from your activity level (0.8 to 2.0 g/kg) to give a daily protein target in grams, rounded to whole grams. Calculations run in your browser, so nothing you type is sent to a server, and the output is an estimate rather than a certified or official figure.
Result
About Protein Intake Calculator
The Protein Intake Calculator multiplies your body weight in kg by a grams-per-kilogram factor set by your activity level: 0.8 g/kg sedentary, 1.2 g/kg active, 1.6 g/kg strength training, or 2.0 g/kg athlete. The result is a daily protein target in grams.
Formula & Mathematical Calculation
Daily Protein (g) = f(Body Weight (kg), Activity Level)
Calculated according to standard health formulas implemented in the calculator core.
Calculation Example
For a body weight of 70 kg at the strength training level (1.6 g/kg): 70 x 1.6 = 112 g. The tool shows Daily Protein = 112 g, with the note: "At 1.6 g/kg, aim for about 112 g of protein per day."
Key Benefits
- Turns body weight and an activity level into a daily protein target
- Offers four grams-per-kg factors from 0.8 up to 2.0
- Rounds the result to whole grams for easy tracking
How to Use this Calculator
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Enter body weight
Type your body weight in kilograms into the Body Weight field (for example 70). -
Choose activity level
Select an activity level from Sedentary (0.8 g/kg) up to Athlete (2.0 g/kg). -
Calculate
Click Calculate and read the Daily Protein (g) result box.
Assumptions & Limitations
What the calculation assumes
- Every value you enter is treated as an exact, known amount.
- Any rate or interval you enter is assumed to hold for the whole period unless the form asks for it separately.
- Results use standard published formulas and account only for the values entered above.
- Rounding is applied for display; the underlying calculation uses your full precision.
- Results are returned in the same units you enter, unless the tool states the output unit.
What it does not cover
- Protein Intake Calculator produces a calculated result for reference and learning, not a certified or official measurement.
- Real-world outcomes differ when tolerances, rounding rules or local standards apply.
- Definitions and standards vary by region and change over time; verify the convention that applies to your case.
- Figures are only as accurate as the inputs you supply — check them before acting on the result.
- For work where the result carries real consequences, confirm it against an authoritative source.
Frequently Asked Questions
Free to use, no account needed. Calculations run in your browser, so nothing you type is sent to a server. Results are estimates — how we build and check our calculators.