Health & Fitness
Protein Requirement Calculator
Estimate daily protein needs based on body weight and activity/goal level.
Preparing your result…
What this calculator does
Calculates Protein Requirement Calculator using the formula verified against the cited source.
What your result means
An estimate from the inputs you enter, within the scope stated below — not advice.
Formula
Protein (g/day) = body weight (kg) × chosen factor (ISSN: about 1.4–2.0 g/kg/day for most healthy exercising people)
The step-by-step working for your own numbers appears with the result above and in the PDF report.
Frequently asked questions
Symbols and assumptions
- Inputs
- The values entered in the fields above
- • Protein grams/day=body weight kg×explicit goal-specific g/kg/day factor. The ISSN position stand gives roughly 1.4–2.0 g/kg/day for most healthy exercising individuals, with different considerations during energy restriction.
Sources and review
Reviewed 2026-10-18 · Next review 2027-04-18
- • A “goal” label alone does not define the factor. Publish the selected factor/range and population; higher hypocaloric targets in the paper must not be confused between total-body and fat-free mass bases. This is an estimate for the scoped population, not a universal requirement.
Important limitation
This is an educational estimate based only on the values and formula shown. Verify current rates, rules, units, and professional standards before relying on the result. It is not personalized financial or investment advice.
Quick reference
| Scenario | Body weight (kg) | Protein factor (g/kg/day) | Daily protein |
|---|---|---|---|
| Worked example | 70 | 1.6 | 112 g/day |
| Half the amounts | 35 | 0.8 | 28 g/day |
| Double the amounts | 140 | 3.1 | 434 g/day |
Need the full picture? Get the detailed PDF report with charts, tables, formulas and working steps.
Reviewed 2026-10-18 · Next review 2027-04-18
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