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Protein Calculator

How much protein do you need per day?

Active adults need 1.6–2.2 g per kg of body weight — a 70 kg person needs 112–154 g a day.

This calculator turns your weight and goal into a daily range and a per-meal target.

Sedentary adults need less: the minimum is 0.8 g per kg.

This range estimates training needs for healthy adults doing resistance exercise.

Individual needs vary.

Your inputs

For adult estimates only. Children and teens need age-appropriate professional guidance.

Your goal

These editable examples illustrate the calculation.

Your daily protein estimate

Protein 1.6–2.2 g/kg body weight per day (sports nutrition consensus); minimum 0.8 g/kg/day (RDA for sedentary adults).

These are estimates for general information only, not medical advice.

When a protein estimate helps

  1. Build muscle

    Check a training-oriented daily range before planning meals.

  2. Lose weight

    Protein can support muscle retention; it cannot guarantee that every lost kilogram is fat.

  3. Eat enough

    Compare a typical day of eating with your planning range.

What the calculator shows

  1. Goal-based range

    Your goal changes the guidance; your weight determines the same numerical range.

  2. Per-meal split

    Divide the daily range across three meals, with rounded values for each meal.

  3. Private by design

    Calculations run in your browser, without an account or uploading fitness inputs.

How the protein range is calculated

Multiply body weight in kilograms by 1.6 and 2.2 for the daily planning range.

Round each daily endpoint, then divide by three and round again for the per-meal display.

Convert pounds to kilograms by dividing by 2.20462.

The RDA reference multiplies body weight in kilograms by 0.8.

Morton and colleagues studied protein supplementation alongside resistance training in healthy adults.

Their 2018 analysis estimated a lean-mass response plateau near 1.6 g/kg/day.

The upper confidence bound was about 2.2 g/kg/day. Individual protein requirements vary.

The analysis did not show further average gains beyond its estimated breakpoint.

That finding does not establish a safety limit or predict every individual response.

The RDA is a population reference. Discuss individual needs and safety with a qualified professional.

Training, age, health, and dietary circumstances can change the guidance you need.

This calculator uses a training-planning range; it does not prescribe protein for every active adult.

For kidney disease, follow individual professional advice about protein.

Questions about this guide

How much protein do I need per day?

How much protein do you need per day?

Active adults need 1.6–2.2 g per kg of body weight — a 70 kg person needs 112–154 g a day.

This calculator turns your weight and goal into a daily range and a per-meal target.

Sedentary adults need less: the minimum is 0.8 g per kg.

Is more protein always better?

No.

The Morton analysis found no further average training benefit beyond its estimated breakpoint.

Individual needs still vary.

Do I need protein powder?

No.

Food can supply protein, and protein powder is optional.

Can I eat too much protein?

More is not always suitable.

Ask a healthcare professional about your needs, especially when you have a medical condition.

What if I have kidney disease?

If you have kidney disease, follow your doctor's advice.

This calculator does not give a protein number for kidney disease.

Who builds WorkoutPlanMaker, and where do the formulas come from?

WorkoutPlanMaker is built by an independent maker, not a clinic.

Calculations use published formulas (Mifflin-St Jeor 1990 for BMR,

U.S. Navy method for body fat,

WHO ranges for BMI).

Results are estimates for general information only, not medical advice.

Talk to a healthcare professional before starting a new diet or exercise program.