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Protein Intake Calculator

Hitting the right daily protein target protects lean muscle while shedding fat and fuels recovery when building strength. Entering your current weight, primary objective, and meal frequency instantly calculates your daily grams and splits them evenly across your eating window.

Free, no account needed

Your measurements

How to measure for an accurate result
  • WeightWeigh yourself first thing in the morning after using the bathroom and before eating or drinking. Use a digital scale on a flat, hard surface for maximum accuracy.
  • GoalSelect Lose weight if you are currently in a calorie deficit, Gain muscle if you are actively resistance training in a calorie surplus, or Maintain if your weight is stable.
  • Meals per dayCount distinct eating opportunities where you consume at least 20g of protein, including planned protein shakes or major snacks. Choose a realistic number between 1 and 8.
112gMaintenance Target
Protein per day
Per meal
37 g
What to do: Divide your daily grams across your routine meals and ensure each meal contains at least 25g of high-quality protein.
What this means for youSave this result

Not saved. A free account keeps it, ready for Health Analytics.

In short

To calculate your daily protein needs, multiply your body weight in kilograms by a goal factor: 1.6 grams per kilogram for maintaining weight, 2.0 grams per kilogram for fat loss to preserve muscle, and 2.2 grams per kilogram for building muscle mass. Spreading this total evenly across your daily meals maximizes muscle protein synthesis.

WHO THIS IS FOR
  • You are dropping body fat and want to preserve lean muscle mass during a calorie deficit.
  • You are lifting weights three to five times a week and targeting Hypertrophy.
  • You are trying to hit daily macronutrient targets without guessing per-meal portions.
  • You are adjusting your dietary intake after a change in overall body weight.

How it works

The Calculation Method

This calculator uses established sports nutrition multipliers to establish your recommended daily protein intake in grams based on body weight and fitness objectives.

Mathematical Formula

  1. Target Multiplier Selection:
  • Maintain goal: 1.6 grams per kilogram of body weight
  • Lose weight goal: 2.0 grams per kilogram of body weight
  • Gain muscle goal: 2.2 grams per kilogram of body weight

  1. Daily Total Calculation: Total Daily Protein (grams) = Weight in kg * Goal Multiplier

  2. Per-Meal Allocation: Per-Meal Protein (grams) = Total Daily Protein / Number of Meals per Day

All final figures are rounded to the nearest whole gram.

Why This Tool Uses These Multipliers

Research in sports nutrition shows that higher protein intakes are necessary during a calorie deficit (Lose weight) to prevent lean tissue breakdown. When aiming to Gain muscle, a target of 2.2 grams per kilogram supplies optimal amino acid availability for tissue synthesis. For general maintenance (Maintain), 1.6 grams per kilogram effectively supports recovery and metabolic health. Splitting this allocation evenly across your daily meals promotes consistent muscle protein synthesis throughout the day.

Limits

This calculator provides a general wellness estimate based on established population body weight multipliers. It is not medical advice.

These estimates are less reliable for individuals with pre-existing renal conditions, severe kidney disease, or liver dysfunction, who must follow clinical protein restrictions set by a physician. Additionally, for individuals with a body mass index above 30, calculating protein strictly from total body weight can overestimate requirements; using lean body mass or adjusted body weight yields more accurate results. Combine these estimates with a registered dietitian's assessment or body composition scans if you have specific clinical needs.

Your result, explained

Pick a band to see what it means and what to do. Yours is selected once you calculate.

Maintenance Target

Range: 1.6 g per kg of body weight
WHAT IT MEANS

Calculated intake target for holding current body weight while supporting tissue repair and everyday activity.

WHAT TO DO

Divide your daily grams across your routine meals and ensure each meal contains at least 25g of high-quality protein.

Try an example

Real situations. Tap one to run it through the calculator above.

Fat Loss Focus

85 kgLose weight4

Marcus is a 34-year-old office worker weighing 85 kg who wants to lose body fat without losing muscle while eating 4 meals a day.

Calculator result: 170g protein/day

Because Marcus is in a caloric deficit, his protein needs are elevated to guard against muscle loss. He should distribute his target across his 4 meals, aiming for equal protein portions at breakfast, lunch, dinner, and a post-workout snack. Use the calorie-calculator to set his matching calorie deficit.

Muscle Building Phase

62 kgGain muscle3

Elena is a 28-year-old recreational lifter weighing 62 kg who wants to add lean muscle mass over the next 12 weeks while consuming 3 meals per day.

Calculator result: 136g protein/day

Her result provides the higher intake necessary to support new muscle tissue synthesis during heavy weightlifting. Reaching her per-meal target across 3 meals requires dense protein sources at every sitting. Explore the macro-calculator to balance her remaining daily carbohydrates and fats.

Weight Maintenance & Fitness

70 kgMaintain5

David is a 45-year-old runner weighing 70 kg looking to maintain his weight and maintain lean muscle while eating 5 times a day.

Calculator result: 112g protein/day

This result establishes an intake that fully supports athletic recovery without excess calories. Spreading this target over 5 smaller meals makes meeting his protein requirement straightforward throughout his busy day. Track overall energy needs with the bmr-calculator.

Common mistakes

  • Skipping protein at breakfast and consuming 70% of daily intake at dinner reduces total muscle protein synthesis across the day. Aim to split your target evenly across all scheduled meals.
  • Ignoring hidden protein sources in whole grains, beans, and vegetables leads to overconsuming animal fats. Count all dietary protein toward your total daily target.
  • Increasing protein intake drastically without drinking extra water can lead to digestive discomfort. Increase fluid intake by 500 ml for every 30g increase in daily protein intake.
  • Assuming protein supplements are required rather than convenient options. Prioritise whole foods like eggs, fish, tofu, and poultry, reserving powders for convenience on busy days.
  • Using gross body weight instead of target weight when significantly overweight, which can result in excessively high daily protein targets. Use an estimated lean mass or adjusted weight if carrying excess fat.

What to do next

Tick them off as you go.

Tools that work with this one

CALCULATORMacro CalculatorCalculates matching carbohydrate and fat targets once your daily protein intake is set.CALCULATORCalorie CalculatorEstablishes your total daily caloric envelope to ensure your protein target fits your energy goals.CALCULATORBody Fat CalculatorHelps determine whether to base protein requirements on total weight or estimated lean body mass.AI HUBAI Nutrition PlanGenerates custom weekly meal plans structured around your calculated per-meal protein targets.

Articles on this topic

NUTRITIONHow Much Protein Do You Actually Need Per Day?The standard 0.8g/kg recommendation prevents deficiency, not muscle loss or sluggish recovery. Discover your actual optimal daily intake.NUTRITIONHow to Set Your Macros for Fat Loss, Muscle Gain, or MaintenanceLearn how to set and adjust your protein, fat, and carb targets using a single real-world example across all three common body composition goals.NUTRITIONMeal Planning Without Boredom: A Weekly System for a Busy WeekMaster a 60-minute component meal prep system with three versatile templates that hit your calorie and protein targets without food boredom.NUTRITIONHow Low Is Too Low? Calorie Floors and Why Crash Diets BackfireSlashing intake too far halts fat loss, tanks workouts, and ruins sleep. Learn how to identify your minimum calorie floor for safe, sustainable results.
All Nutrition articles →

Terms explained

Protein IntakeMacronutrients (Macros)Daily Calorie Needs (TDEE)Weight Gain Plan

Frequently asked questions

What should I do if I cannot hit my calculated per-meal protein target?

If hitting your target in a single meal feels overwhelming, consider adding a high-protein snack such as cottage cheese or a protein shake. You can also adjust the meals per day input to spread the intake over more frequent, smaller feedings. Consistency across the full day matters more than matching every meal perfectly.

Why does the protein requirement increase when my goal is to lose weight?

When eating in a calorie deficit, your body is at risk of breaking down muscle tissue for energy. Elevating protein intake to 2.0 grams per kilogram protects lean muscle mass while promoting satiety. This ensures that the weight you lose comes predominantly from fat rather than muscle.

Is consuming more protein than the calculator recommends dangerous?

For healthy individuals with normal kidney function, consuming higher protein levels is generally safe and well-tolerated. However, exceeding your target offers diminishing returns for muscle synthesis and adds unnecessary calories to your diet. Those with existing kidney conditions should consult a physician before increasing intake.

How quickly after my workout do I need to consume my protein allocation?

The strict anabolic window concept is largely exaggerated. So long as you hit your calculated daily protein target and distribute it evenly across your chosen meal frequency, timing within 1 to 2 hours post-workout is sufficient for recovery.

Should I calculate protein needs based on total weight or lean body mass?

This tool uses total body weight with adjusted multipliers (1.6 to 2.2 g/kg), which works accurately for most people. If your body fat percentage is significantly above average, calculating based on ideal body weight or lean mass prevents overestimation.

Do plant-based proteins count toward my total protein target?

Yes, all dietary protein from plants, including beans, lentils, tofu, and grains, counts toward your total target. To ensure a complete amino acid profile, eat a diverse range of plant protein sources throughout the day.

How often should I re-calculate my protein intake?

Re-calculate your target whenever your body weight changes by more than 3 to 5 kilograms, or when you switch your fitness goal (such as moving from Lose weight to Gain muscle). Small daily fluctuations in weight do not require adjustments to your plan.

General wellness information, not medical advice. If you have a health condition or are worried about a result, talk to a doctor.