Protein Needs for Seniors Calculator

As we age, the body becomes less efficient at synthesizing muscle protein — a phenomenon called anabolic resistance. Older adults typically need 1.2–2.0 g of protein per kg of body weight per day, compared to the general adult RDA of 0.8 g/kg, in order to maintain muscle mass, strength, and overall function.

This calculator uses your body weight (in kg) multiplied by an age-adjusted protein factor. The factor ranges from 1.2 g/kg for sedentary seniors to up to 1.8–2.0 g/kg for very active seniors or those focused on muscle building. Activity level and health goal both shift the multiplier used.

Most nutrition scientists and dietitians recommend 1.2–1.6 g of protein per kg of body weight per day for healthy adults over 65. For a 70 kg (154 lb) senior, that translates to roughly 84–112 grams of protein per day. Those recovering from illness or doing regular strength training may need even more.

Top protein sources include lean meats (chicken, turkey, beef), fish and seafood, eggs, dairy products (Greek yogurt, cottage cheese, milk), legumes (lentils, chickpeas), tofu, tempeh, and protein-enriched foods. Spreading intake across meals helps maximize muscle protein synthesis throughout the day.

Research suggests consuming at least 25–30 grams of high-quality protein per meal to effectively stimulate muscle protein synthesis in older adults. Spreading your total daily protein across 3–4 meals is more effective than consuming most of it in one sitting.

Seniors with chronic kidney disease (CKD) who are not on dialysis are often advised to limit protein intake to 0.6–0.8 g/kg/day to reduce kidney workload. However, those on dialysis may need more. Always consult your healthcare provider if you have kidney or liver disease before significantly increasing protein intake.

Yes. Regular physical activity — especially resistance training — increases muscle protein synthesis and raises protein requirements. Active seniors benefit from higher protein intakes (1.4–2.0 g/kg/day) to support muscle maintenance and repair. Even moderate aerobic exercise increases protein needs above the basic RDA.

Yes, but it requires planning. Plant proteins (from legumes, grains, nuts, seeds, soy) are often lower in certain essential amino acids compared to animal proteins. Seniors following a plant-based diet should eat a variety of protein sources and may need to consume slightly more total protein to compensate for lower digestibility.