Quick answer
Protein Intake Calculator: what it calculates
Protein Intake Calculator calculates daily protein target from weight, protein target and meals per day. The core method is Protein grams per day = body weight in kg x grams per kg target.
Health Calculators
Protein Intake Calculator
Use this protein intake calculator to estimate daily protein grams from body weight and a chosen g/kg target.
Reviewed May 25, 2026EstimateFormula shown
ResultDaily protein target
InputsWeight, Protein target, Meals per day
FormulaProtein intake formula
Live calculator
Protein intake
Daily protein target62 g/day
0.8 g/kg x 77.1 kg body weight.
Protein per meal21 g
If spread across 3 meals per day.
Adult RDA baseline62 g/day
Uses 0.8 g/kg for healthy adults as a baseline, not a disease-specific plan.
Formula
Protein intake formula
Protein grams per day = body weight in kg x grams per kg targetThe adult RDA baseline is 0.8 g/kg for healthy adults; active targets are planning estimates.
How to use
Steps
- Enter body weight in pounds.
- Choose a protein target.
- Enter meals per day to split the target.
- Compare the selected target with the adult RDA baseline.
Example
Sample calculation
Weight170 lb
Target0.8 g/kg
Protein62 g/day
Calculator use
Best for
- Quick daily protein target from weight, protein target and meals per day.
- Wellness, nutrition, pregnancy, or fitness planning when a rough estimate is enough.
- Scenario comparisons before changing calorie, macro, or body-measurement assumptions.
- Planning alongside professional medical or nutrition advice, not as a diagnosis.
Before relying on it
Check first
- Entering weight, protein target and meals per day from different time periods or scenarios.
- Treating a calculator result as medical advice or a diagnosis.
- Using stale body, activity, pregnancy, or nutrition inputs when your situation has changed.
- Ignoring context such as age, medication, training status, medical history, or professional guidance.
Details
What to know before using the result
These notes make the assumptions explicit, especially where the same search query can mean slightly different things.
RDA baseline0.8 g/kg
This is a general adult baseline and may not match athletic, older adult, pregnancy, illness, or clinical nutrition needs.
Target choiceGoal dependent
Training, dieting, age, appetite, kidney disease, and medical history can change what target is appropriate.
Meal splitPlanning only
Per-meal protein is a convenience estimate; total daily intake and food quality still matter.
Benchmarks
How to read the result
The calculator is a decision aid, not a fixed rule. Use the output to compare scenarios and document your assumptions.
0.8 g/kgAdult RDA baseline
General healthy adult baseline, not a performance target.
1.2 g/kgActive planning
A common planning target for active people, depending on context.
1.6 g/kgHigher training target
Often used by strength-training calculators, but individual needs vary.
Calculator accuracy
Methodology and assumptions
The formula, inputs, example, and limitations are shown so the result is checkable, not just a number in a box.
Formula
Protein grams per day = body weight in kg x grams per kg target
Inputs used
Weight, Protein target, Meals per day
Limitations
Results are estimates for quick planning and should be checked before important financial, legal, tax, health, or business decisions.
Last reviewed
May 25, 2026
Cite this page
Toolkit Shelf. Protein Intake Calculator. Retrieved May 25, 2026, from https://toolkitshelf.com/tools/protein-intake-calculator
FAQ
Common questions
How much protein do I need per day?
A general healthy adult RDA baseline is 0.8 grams per kilogram of body weight. Higher planning targets may be used for training or specific goals.
Is more protein always better?
No. Needs vary, and medical conditions such as kidney disease can change protein guidance.
How do I convert pounds to kilograms for protein?
Multiply pounds by 0.4536, then multiply kilograms by the grams-per-kilogram target.