Daily Protein Intake Calculator
Enter your weight, activity level, and goal to see a general protein reference range. Educational only (not medical advice).
How we calculate this
We start with the standard RDA baseline of 0.8g protein per kg body weight (for sedentary adults), then apply multipliers based on your activity level and goals.
- Sedentary: 0.8g/kg (1.0× base)
- Moderate: ~1.0g/kg (1.25× base)
- Active: ~1.1g/kg (1.4× base)
- Very active: ~1.3g/kg (1.6× base)
- Athlete: ~1.6g/kg (2.0× base)
For muscle gain, a minimum of 1.6g/kg is used (per ISSN recommendations). For weight loss, a minimum of 1.2g/kg is used (higher protein supports satiety). For adults 65+, a minimum of 1.0g/kg is applied.
Sources
- Institute of Medicine — Dietary Reference Intakes (DRI) for protein
- International Society of Sports Nutrition (ISSN) — Position stand on protein and exercise
- European Society for Clinical Nutrition and Metabolism (ESPEN) — Protein recommendations for older adults
- NIH / PubMed study links below are for educational reading only.
Limitations
- Does not account for kidney disease, diabetes, or other medical conditions.
- Does not account for pregnancy, breastfeeding, or childhood growth.
- Actual protein needs vary by health status, medications, and individual factors.
- This tool provides reference ranges, not individualized guidance.
Related research (Zynava library)
Here are a few protein- and amino acid-related study links from Zynava's research library. These links are for educational reading only.
- Effect of Magnesium Supplementation on Plasma C-reactive Protein Concentrations: A Systematic Review and Meta-Analysis of Randomized Controlled Trials (PubMed, 2017)
- The Effects of Vitamin D Supplementation on C-Reactive Protein and Systolic and Diastolic Blood Pressure in Postmenopausal Women: A Meta-Analysis and Systematic Review of Randomized Controlled Trials (PubMed, 2024)
- Effects of Whey Protein, Leucine, and Vitamin D Supplementation in Patients with Sarcopenia: A Systematic Review and Meta-Analysis (PubMed, 2023)
- Whey Protein Supplementation with or without Vitamin D on Sarcopenia-Related Measures: A Systematic Review and Meta-Analysis (PubMed, 2023)
- The effect of vitamin D supplementation on glycemic status and C-reactive protein levels in type 2 diabetic patients with ischemic heart disease: A protocol for systematic review and meta-analysis (PubMed, 2022)
- The effect of vitamin D plus protein supplementation on sarcopenia: A systematic review and meta-analysis of randomized controlled trials (PubMed, 2021)
- Optimising amino acid absorption: essential to improve nitrogen balance and metabolic control in phenylketonuria (PubMed, 2019)
- Mechanistic roles and intervention strategies involving gut microbiota, amino acid metabolism, and the tumor immune microenvironment in MAFLD-HCC progression (PubMed, 2025)
FAQs
How much protein do I need per day?
The general RDA for sedentary adults is 0.8g per kg of body weight. More active individuals, athletes, and those with muscle-gain or weight-loss goals may need more — typically 1.0–2.0g per kg. This calculator provides a reference range based on your inputs.
Does protein need vary by gender?
The base RDA for protein (0.8g per kg) is the same for adult males and females. Adjustments in this tool are based on weight, activity level, and goals rather than gender.
How is the "per meal" amount calculated?
We divide the daily target by 3 (assuming 3 meals per day). In practice, you can spread protein across more or fewer meals depending on your preference.
Do older adults need more protein?
Research suggests that adults 65 and older may benefit from higher protein intake (around 1.0–1.2g per kg) to help maintain muscle mass. This tool applies a minimum of 1.0g/kg for adults 65+.
Is higher protein safe?
For most healthy adults, protein intakes in the ranges shown here are generally well-studied. If you have kidney disease or other medical conditions, consult your healthcare provider before changing protein intake.
Is this medical advice?
No. This tool provides general reference ranges for educational purposes only. Individual protein needs vary based on health conditions, medications, and other factors. Consult a healthcare provider or registered dietitian for personalized guidance.