Health / Browser calculator

Protein Calculator

Protein Calculator works from the inputs you provide and returns protein scenario (g/day). Use the calculation panel to explore a scenario, then check the formula and limitations before applying the result.

Your inputs

Minimum: 1e-06 · Maximum: 1500
Minimum: 0 · Maximum: 3

Your results

Enter your values and calculate to see the result.

This calculator is for informational purposes only and is not a substitute for professional medical advice.

Formula and calculation method

Protein = body weight in kilograms × user-entered grams per kilogram.

A user-selected intake scenario. Kidney disease, pregnancy and other conditions require professional guidance.

How to use protein calculator

  1. Set Measurement system by choosing the option that matches your calculation.
  2. Set Weight (kg or lb). The example below uses 70.
  3. Set Protein factor (g per kg per day). The example below uses 0.8.
  4. Select Calculate to update the result. Reset restores the illustrated inputs. Copy, print or download your own result if you need a record.

Worked example

Example inputs
Measurement system
Metric (kg, cm)
Weight (kg or lb)
70
Protein factor (g per kg per day)
0.8
Protein scenario (g/day)
56

Factors affecting your result

A user-selected intake scenario. Kidney disease, pregnancy and other conditions require professional guidance.

Changing measurement system changes the scenario being evaluated. Adjust one input at a time when comparing results, keep a copy of the assumptions, and compare values using the same unit and period. A precise arithmetic result does not make an uncertain assumption precise.

Frequently asked questions

How does the protein calculator work?

Protein = body weight in kilograms × user-entered grams per kilogram.

What inputs does Protein Calculator need?

Enter measurement system, weight (kg or lb), protein factor (g per kg per day). Choose values that correspond to the same situation and measurement convention.

How should I interpret the protein calculator result?

A user-selected intake scenario. Kidney disease, pregnancy and other conditions require professional guidance.

Are my protein calculator inputs uploaded?

No. The calculation runs in this browser. Favorites, recent tool names, theme and formatting preferences may be saved locally, but calculation inputs are not sent to a calculation server or stored by this website. Shared links do not include entered values.

Maintained by Calculators.buzz Editorial Team. Implementation date: . No professional credentials or clinical review are claimed. Read our methodology policy.