Protein Intake Calculator

Estimate daily protein using body weight and a chosen grams-per-kilogram target. Enter your own values below to see daily protein target and check the method behind it.

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Your inputs

Change the example values to match your situation.

Your result

Let’s work it out.

Fill in your inputs and select Calculate.
Your result and breakdown will appear here.

How this calculator works

Protein target = body weight × the entered grams-per-kg target. Choose a target appropriate to your health and training needs.

Before you use the result

  • Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment.

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What is Protein Intake Calculator?

Protein Intake Calculator helps you estimate daily protein using body weight and a chosen grams-per-kilogram target.

The main result is daily protein target. The formula, example and assumptions below explain how to interpret it.

How to use Protein Intake Calculator

Use the example to get familiar with the form, then enter your own figures. Any rates in the example are illustrative. Check the field labels and units before calculating.

  1. Gather body weight (kg) and protein target per kg (g/kg/day). Use values from the same situation or reporting period.
  2. Replace the example body weight with your own value, then complete the other fields. Check the displayed units.
  3. Select Calculate and read daily protein target. Change one input and calculate again to compare a second scenario. Reset restores the original example.
  • Enter body weight in kg, at least 20 and at most 500. Decimals are accepted.
  • Enter protein target per kg in g/kg/day, at least 0.1 and at most 3. Decimals are accepted.

Protein Intake Calculator: a worked example

With the inputs below, the result is 84 g/day (daily protein target). Follow the example, then replace these illustrative values with your own.

Example inputs and output
Input or outputExample value
Body weight (kg)70 kg
Protein target per kg (g/kg/day)1.2 g/kg/day
Daily protein target84 g/day

Understanding the Protein Intake result

The main output is daily protein target, expressed in g/day. It applies to the inputs and operation you selected.

Displayed results use a readable number of decimal places. When checking a result by hand, keep extra precision until the last step. To compare scenarios, change one input at a time and keep the others fixed.

Protein Intake Calculator: assumptions and common mistakes

A useful estimate starts with the right inputs. Check the following assumptions and limits before applying the result to your situation.

  • Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment.
  • Health estimates are context-dependent. Age, pregnancy, illness, medication and individual measurements can affect interpretation; these tools do not diagnose a condition.

For wider guidance, visit World Health Organization. The formula and scope of this specific tool are stated on this page.

Protein Intake Calculator FAQs

What does Protein Intake Calculator calculate?

Protein Intake Calculator helps you estimate daily protein using body weight and a chosen grams-per-kilogram target. Its main output is daily protein target in g/day.

What inputs do I need for Protein Intake Calculator?

You need body weight (kg) and protein target per kg (g/kg/day). Use the field labels and units to match your figures to the formula.

Which formula does Protein Intake Calculator use?

Protein target = body weight × the entered grams-per-kg target. Choose a target appropriate to your health and training needs.

What is a worked example for Protein Intake Calculator?

Example inputs: Body weight: 70 kg; Protein target per kg: 1.2 g/kg/day. The result is 84 g/day (daily protein target).

How should I enter body weight?

Enter body weight in kg, at least 20 and at most 500. Decimals are accepted.

How do I choose protein target per kg?

Enter protein target per kg in g/kg/day, at least 0.1 and at most 3. Decimals are accepted. The example uses 1.2 g/kg/day; replace it if your circumstances differ.

How should I read daily protein target?

The main output is daily protein target, expressed in g/day. It applies to the inputs and operation you selected.

Why might my Protein Intake Calculator result differ from my records?

Estimates for general information. They do not diagnose a condition or replace a qualified clinician’s assessment. Differences in entered values, units or rounding can also change the comparison.

Can I compare two scenarios in Protein Intake Calculator?

Yes. Note your first daily protein target, change body weight or another input, and select Calculate again. Editing a field clears the old result so it is not mistaken for a new calculation.

Is Protein Intake Calculator free, and where are my inputs calculated?

This calculator is free to use without signing in. Its formula runs in your browser; calculator inputs are not sent to a calculation API. The inputs reset to the example values when you reset the form or start a fresh page.