Protein Calculator FAQs

Wallingford, CT - May 12, 2026--

FAQs: About the Daily Protein Intake Calculator

Note: The Protein Calculator and the Guide to Protein-Rich Foods can be found at https://www.toyourhealth360.com/protein-calculator/

Who is this calculator meant for?

This calculator is for adults age 18-100. It is meant for a broad spectrum of laypeople and covers a wide variety of athletic activity. It is especially useful for middle-aged women (age 40-64) and men and women in their senior years (age 65+), recommending protein intake levels to combat sarcopenia, or age-related muscle loss.

Does To Your Health collect personal information or email addresses from users of this calculator?

No. The calculator is free and no information about the user is saved. We offer this calculator as a public service to educate people and help them reach their optimal protein level.

What makes this calculator different from other protein calculators on the internet?

Many online protein calculators (e.g. USDA calculator) rely on outdated science, producing minimum dietary targets that fall short of current recommended levels. This calculator is different — it draws on the latest peer-reviewed research to deliver age-specific protein ranges calibrated separately for adults 18–39, 40–64, and 65+. It further adjusts by gender, weight, and activity level, giving a recommendation that is personalized to the user’s specific profile.

What scientific studies and recommendations does the calculator draw from?

In building the calculator, we conducted extensive research, drawing on findings and recommendations from over a dozen peer-reviewed studies, scientific papers, and clinical guidance sources. Notably, we drew from the PROT-AGE Study Group, the Mayo Clinic, and the International Society of Sports Nutrition. A full list of scientific references can be found in our newsroom at xyz.com.

Does this calculator account for muscle loss in middle-aged adults and the elderly?

Yes. The calculator factors in recommendations made by scientists to increase protein intake in middle age (age 40-64) and senior years (age 65+), specifically to combat muscle loss that can occur in these age groups.

Many people take GLP-1 medication, which can cause muscle loss. Does this calculator account for that?

While the calculator does not directly address GLP-1 drugs, it does address increased muscle loss that can occur starting at age 40. As research on GLP-1-caused muscle loss becomes available, we will update the calculator accordingly. For GLP-1 users, we recommend that they use the calculator, then discuss the recommended protein target with their health care provider to see if more dietary protein is recommended.

Does eating more protein mean just eating more meat and dairy?

No. There are a wide variety of plant-based foods that contain ample amounts of protein. Many vegetarians manage to eat enough protein without ever eating meat. Our Guide to Protein-Rich Foods for an extensive list of plant-based foods that provide dietary protein. The guide can be found in our pressroom at xyz.com.

The calculator has a 150 grams per day cap and does not recommend daily amounts of protein above this cap. Why?

The calculator is meant to serve a broad spectrum of the population under generalized conditions. We created the 150g/day cap because higher intakes are often more individualized and may warrant review by a registered dietician or health care provider, especially for people with kidney disease, very high body weight, extreme training demands, or other medical considerations.

New federal guidelines recommend 1.2-1.6 grams per kilogram of body weight per day. Does this calculator incorporate these new guidelines?

Yes. For the majority of people with low to medium activity levels, the calculator recommends 1.2-1.6 g/kg/day. For more active individuals, the calculator recommends higher levels of protein (1.61-1.90 g/kg/day), which is in keeping with recommendations from the Mayo Clinic and the International Society of Sports Nutrition. The calculator does not recommend more than 1.90 g/kg/day.

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