About this calculator
This calculator estimates daily protein target ranges for older adults using grams per kilogram of body weight. It is useful for caregivers, older adults, and clinicians discussing nutrition goals.
Protein needs are individualized. Kidney disease, liver disease, swallowing problems, poor appetite, wounds, frailty, and medical nutrition therapy require professional guidance.
Uses protein intake ranges commonly recommended for older adults: at least 1.0–1.2 g/kg/day for healthy older adults, and 1.2–1.5 g/kg/day in some acute or chronic illness contexts. Kidney disease or protein restriction requires clinician guidance.
Activated — nutrition guidance estimate
Educational estimate only; not a diagnosis, prescription, or treatment plan.
Formula and method
Daily protein range = body weight in kg × recommended g/kg/day range. Healthy older adults: 1.0–1.2 g/kg/day. Active or illness contexts may use 1.2–1.5 g/kg/day unless medically restricted.
Limitations and when not to rely on this result
- Educational estimate only; not a diagnosis, prescription, or treatment plan.
- Result depends on accurate inputs and may not apply to complex medical situations.
- Use clinician judgment, local guidance, and urgent care pathways when symptoms are severe.
Frequently asked questions
How much protein do older adults need? +
The PROT-AGE group recommends at least 1.0–1.2 g/kg/day for many older adults, with higher ranges sometimes used in illness or active contexts.
Why are older adult protein needs higher than the RDA? +
Many experts recommend higher intake to support muscle maintenance and function with aging, especially when paired with activity or resistance training.
Should kidney disease patients use this? +
Not without clinician guidance. Some kidney conditions require protein restriction or individualized targets.
Should protein be spread across meals? +
Many people find it practical to distribute protein across meals, but specific meal timing should be individualized.
Can this diagnose sarcopenia? +
No. It only estimates intake targets; sarcopenia assessment needs strength, function, muscle-mass, and clinical evaluation.