GetHealthyCalculators
Skip to content

Protein Intake Calculator

Protein is essential for muscle repair, immune function, and overall health. Your ideal daily protein intake depends on your body weight and how physically active you are. This calculator provides a personalized range based on evidence-backed guidelines for different activity levels.

Reviewed by GetHealthyCalculators Editorial Team · Updated April 14, 2026

Quick Answer

Most adults need 0.8 g/kg of body weight daily. Active individuals and strength trainers benefit from 1.2–2.4 g/kg for optimal muscle recovery.

These results are estimates based on general formulas and are not a substitute for professional medical advice. Consult a healthcare provider before making health decisions.

Enter your weight and activity level to calculate your protein needs.

How the Formula Works

  1. Enter your body weight in pounds or kilograms.

    If metric, weight is converted: lbs = kg × 2.205

  2. Select your activity level to determine the protein multiplier range.

    Sedentary: 0.36–0.54 g/lb | Lightly Active: 0.5–0.7 g/lb | Moderate Exercise: 0.6–0.8 g/lb Strength Training: 0.7–1.0 g/lb | Intense Training: 0.8–1.2 g/lb | Cutting: 0.9–1.3 g/lb

  3. Multiply your weight by the min and max multipliers to get your range.

    Min Protein = Weight(lbs) × Lower Multiplier Max Protein = Weight(lbs) × Upper Multiplier

  4. The recommended intake is the midpoint of your personalized range.

    Recommended = (Min + Max) ÷ 2

Methodology & Sources

Reviewed and updated April 14, 2026 · Prepared by GetHealthyCalculators Editorial Team

Ranges draw on the Institute of Medicine RDA (0.8 g/kg) as the minimum for preventing deficiency plus sports-nutrition consensus intakes. Morton et al. (Br J Sports Med 2018) systematic review and meta-analysis found a protein-intake ceiling near 1.6 g/kg/day for added muscle accrual during resistance training, with individual responses extending to ~2.2 g/kg/day. Higher intakes (2.3–3.1 g/kg) have been proposed for lean athletes in a deficit (Helms et al., J Int Soc Sports Nutr 2014). These ranges are practical starting points for generally healthy adults and do not replace advice from a registered dietitian or physician.

References

  • Dietary Reference Intakes for Energy, Carbohydrate, Fiber, Fat, Fatty Acids, Cholesterol, Protein, and Amino Acids · Institute of Medicine / National Academies Press (2005)
  • A systematic review, meta-analysis and meta-regression of the effect of protein supplementation on resistance training-induced gains in muscle mass and strength (Morton RW et al., Br J Sports Med 2018;52:376–384) · British Journal of Sports Medicine
  • Dietary protein for athletes: from requirements to optimum adaptation (Phillips SM, van Loon LJ, J Sports Sci 2011;29:S29–S38) · Journal of Sports Sciences
  • Evidence-based recommendations for natural bodybuilding contest preparation: nutrition and supplementation (Helms ER et al., J Int Soc Sports Nutr 2014;11:20) · Journal of the International Society of Sports Nutrition
  • Protein "requirements" beyond the RDA: implications for optimizing health (Phillips SM, Chevalier S, Leidy HJ, Appl Physiol Nutr Metab 2016;41:565–572) · Applied Physiology, Nutrition, and Metabolism
  • Nutrition and Athletic Performance — Joint Position Statement (Thomas DT et al., Med Sci Sports Exerc 2016;48:543–568) · ACSM / Academy of Nutrition and Dietetics / Dietitians of Canada
  • Protein requirements and recommendations for older people: a review (Bauer J et al., J Am Med Dir Assoc 2013;14:542–559) · Journal of the American Medical Directors Association

Limitations

  • These ranges are general guidelines and do not apply to individuals with chronic kidney disease, liver failure, or other conditions requiring protein restriction — always consult your healthcare provider.
  • Protein needs vary with body composition — someone with more lean mass may need more protein than another person of identical body weight.
  • Age, pregnancy, breastfeeding, illness, surgery recovery, and burns or trauma can raise protein requirements considerably.
  • This calculator does not address protein distribution across meals (~0.4 g/kg per meal is often cited for maximizing muscle protein synthesis).
  • Protein quality matters — plant-based diets may require 10–20% higher total intake to match the amino-acid profile of animal sources.
  • The 1.6–2.2 g/kg ceiling identified by Morton et al. (BJSM 2018) is for muscle accrual specifically; needs for satiety or body-recomp in a deficit may differ.

Frequently Asked Questions

How much protein do I need per day?
Daily protein needs vary by activity level. Sedentary adults need about 0.36 grams per pound of body weight, while those doing intense training or cutting may need 0.8-1.3 grams per pound. Use this calculator to get a personalized recommendation.
Does protein intake depend on activity level?
Yes. Physical activity — especially resistance training — increases the demand for protein to support muscle repair and growth. More active individuals and those building muscle need significantly more protein than sedentary people.
Can I eat too much protein?
For most healthy adults, eating more protein than needed is not harmful and is simply used for energy. However, individuals with kidney disease should consult a healthcare provider, as excess protein can strain the kidneys in those with pre-existing conditions.
What are good sources of protein?
High-quality protein sources include chicken, fish, eggs, dairy, legumes, tofu, and protein supplements like whey or plant-based powders. A varied diet with multiple protein sources helps ensure you get all essential amino acids.
Should I spread protein intake across meals?
Research suggests distributing protein evenly across 3-4 meals per day (about 25-40 grams per meal) may optimize muscle protein synthesis compared to consuming most of your protein in a single meal.
Should I base protein on my goal weight or current weight?
For most people, current body weight works well as a practical starting point. If you have a high body fat percentage and want a more tailored estimate, lean body mass can be a better anchor for protein planning.
Do older adults need more protein?
Often yes. The PROT-AGE consensus (Bauer et al., JAMDA 2013) recommends 1.0–1.2 g/kg/day for healthy older adults and 1.2–1.5 g/kg/day for those with acute or chronic illness, to help preserve muscle mass and counter anabolic resistance.
Is plant-based protein as effective as animal protein?
Plant proteins typically have lower leucine and essential-amino-acid density than animal sources. When calories and total protein match, and intake is varied across beans, grains, and soy, muscle and strength outcomes can be similar — plant-based eaters may benefit from 10–20% higher total intake to compensate.
When should I consult a doctor about protein intake?
If you have chronic kidney disease, are on dialysis, have liver disease, a history of gout, pancreatitis, or take medications that interact with dietary protein, consult a nephrologist or registered dietitian before raising protein above the RDA.

Stay hydrated to support protein metabolism

Water Intake Calculator

Related Calculators

Macro Calculator

Distribute your daily calories across protein, carbs, and fat.

Calculate

Calorie Calculator

Find your daily calorie goal for weight loss, maintenance, or gain.

Calculate

Lean Body Mass Calculator

Calculate your lean body mass and estimated body fat using the Boer formula.

Calculate

Fat Intake Calculator

Find your recommended daily fat intake in grams based on your calorie target and dietary preference.

Calculate

Vegan Macro Calculator

Calculate plant-based macros with a 20% protein, 55% carb, 25% fat split and fortification guidance.

Calculate

eGFR Calculator

Estimate your kidney function (eGFR) from serum creatinine, age, and sex using the CKD-EPI 2021 race-free equation.

Calculate

Body Surface Area Calculator

Calculate your body surface area using DuBois, Mosteller, and Haycock formulas.

Calculate

Paleo Macro Calculator

Calculate paleo macros from TDEE using a 30% protein, 30% carb, 40% fat split with a paleo food focus.

Calculate

Carnivore Macro Calculator

Calculate carnivore-style macros using a 35P / 5C / 60F split. Informational framework — long-term data is limited.

Calculate

Mediterranean Macro Calculator

Calculate Mediterranean-diet macros using a 20% protein, 50% carb, 30% fat split with olive oil, fish, and whole grains.

Calculate

Creatine Loading Calculator

Calculate your creatine loading phase dose and maintenance dose based on bodyweight, citing Hultman et al. 1996.

Calculate

Carbohydrate Intake Calculator

Calculate your daily carbohydrate target based on your TDEE and preferred carb level.

Calculate

More on This Topic

LiftProof · Guide

How Much Protein Do You Actually Need to Build Muscle?

Protein requirements for muscle growth, including timing and distribution.

Read more

Prova · Guide

Protein Optimization: How Much Protein Men Actually Need

Research-backed protein recommendations for men based on activity level and goals.

Read more