# Daily Protein Intake Calculator

Calculate your daily protein needs based on weight, activity level, and goals. Evidence-based recommendations from ISSN and ACSM research.

## What this calculates

Protein is essential for muscle repair, immune function, and overall health. Your optimal protein intake depends on your body weight, activity level, and fitness goals. Use this calculator to find your recommended daily protein range.

## Inputs

- **Body Weight** (kg) — min 1, max 300
- **Activity Level** — options: Sedentary (little or no exercise), Lightly active (1–3 days/week), Moderately active (3–5 days/week), Very active (6–7 days/week), Athlete / Heavy training
- **Fitness Goal** — options: Maintain weight, Lose fat, Build muscle

## Outputs

- **Minimum Daily Protein** (g/day) — Lower end of recommended protein intake
- **Maximum Daily Protein** (g/day) — Upper end of recommended protein intake
- **Per Meal (4 meals)** (g/meal) — Suggested protein per meal if eating 4 meals
- **Recommendation** — formatted as text — Protein intake guideline based on your inputs

## Details

The RDA (Recommended Dietary Allowance) for protein is 0.8 g/kg of body weight, which is the minimum to prevent deficiency in sedentary adults. However, research from the International Society of Sports Nutrition (ISSN) and American College of Sports Medicine (ACSM) shows that active individuals benefit from significantly more protein. Athletes and those looking to build muscle should aim for 1.6–2.2 g/kg per day. During a calorie deficit for fat loss, even higher intakes (up to 2.4 g/kg) can help preserve lean muscle mass. Spreading protein intake across 3–4 meals with 20–40 g per serving optimizes muscle protein synthesis.

## Frequently Asked Questions

**Q: Can you eat too much protein?**

A: For healthy individuals, protein intakes up to 2.2 g/kg per day have been shown to be safe in research studies. However, very high protein diets may not be suitable for people with kidney disease or other medical conditions. Consult a healthcare provider if you have concerns.

**Q: What are good protein sources?**

A: High-quality protein sources include chicken breast, fish, eggs, Greek yogurt, cottage cheese, lean beef, tofu, tempeh, legumes, and whey protein. Aim for a variety of sources to get a complete amino acid profile.

**Q: Does timing of protein intake matter?**

A: While total daily protein is more important than timing, research suggests that spreading protein evenly across meals (20–40 g per meal) and consuming protein within a few hours of exercise can optimize muscle protein synthesis.

**Q: Is this calculator a substitute for professional dietary advice?**

A: No. This calculator provides general estimates based on population research. Individual protein needs can vary based on health conditions, age, body composition, and other factors. Consult a registered dietitian or healthcare provider for personalized recommendations.

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Source: https://vastcalc.com/calculators/health/protein
Category: Health & Fitness
Last updated: 2026-04-21