Using the Protein Calculator
Enter body weight in kilograms and the selected protein factor in grams per kilogram per day. Multiplying the two gives the daily amount. For example, 70 kilograms at a factor of 0.8 produces 56 grams; the example illustrates the calculation and is not a recommendation for everyone.
Worked example
Use the example inputs below to reproduce this result. These are the form's starting values, not recommended targets. Changing your inputs updates your result above; this worked example stays fixed for comparison. Results are rounded for display.
Example inputs
- Body weight (kg)
- 70
- Chosen protein factor (g/kg/day)
- 0.8
Example result
- Protein (g/day)
- 56
Method and assumptions
Body weight × chosen grams per kilogram. Needs vary with age, activity, pregnancy and medical conditions.
Keep the food quantity consistent
Nutrition arithmetic depends on the quantity of food being described. A per-serving value and a per-hundred-gram value cannot be added or compared directly without scaling them first. When checking a food diary, confirm that all entries use the amount actually recorded. These conversions explain numbers; they do not assess whether a diet meets an individual's needs.
Common question
Does a higher factor automatically mean a better target?
No. The tool multiplies the factor you provide without deciding whether it is suitable. Protein needs and any restrictions depend on individual circumstances. Use a target that fits your situation rather than choosing a number simply because it produces a larger result.
Guide updated .