CalculationTime

Protein Intake Calculator

Live math canvas

Your numbers, formula and explanation together

Protein Intake Calculator: 144 g protein/day. 80 kg x 1.8 g/kg = 144 g/day. Across 4 meal(s): 36 g/meal. Protein calories 576, 24% of calories.

Formula applied

The exact method behind this answer

CalculationTime keeps the method visible so the number can be checked instead of blindly trusted.

Daily protein = body weight kg x grams per kg. Per meal = daily protein / meals. Protein calories = protein grams x 4.
  1. Apply the formulaDaily protein = body weight kg x grams per kg. Per meal = daily protein / meals. Protein calories = protein grams x 4.144 g protein/day80 kg x 1.8 g/kg = 144 g/day. Across 4 meal(s): 36 g/meal. Protein calories 576, 24% of calories.

Your live breakdown

Current inputs in the calculation

These values come from the controls above and update when the calculator changes.

Body weight
80 kg
Current or target body weight.
Protein target
1.8 g/kg/day
Daily protein grams per kilogram.
Meals per day
4 count
Used to split protein across meals.
Daily calories
2,400 kcal optional
Used to show protein calorie share.

Resulting answer

144 g protein/day

80 kg x 1.8 g/kg = 144 g/day. Across 4 meal(s): 36 g/meal. Protein calories 576, 24% of calories.

Answer
144 g protein/day
Live support
80 kg x 1.8 g/kg = 144 g/day. Across 4 meal(s): 36 g/meal. Protein calories 576, 24% of calories.

Assumptions used

What this answer assumes

Nutrition planning estimate only. Ask a qualified clinician for medical dietary needs.

  • Protein target is user-selected.
  • Does not diagnose medical, kidney, sports or dietetic needs.
  • Meal split is a planning guide only.

Master’s Tip

How to use the result well

Choose the grams-per-kg target from the goal first, then use the per-meal number to make the target practical.

Printable record

What belongs in the saved calculation

Save the inputs, result, formula, assumptions, page URL and date together so the calculation can be reviewed later.

Body weight
80 kg
Current or target body weight.
Protein target
1.8 g/kg/day
Daily protein grams per kilogram.
Meals per day
4 count
Used to split protein across meals.
Daily calories
2,400 kcal optional
Used to show protein calorie share.

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Explain it like I'm 12

Protein Intake Calculator turns body weight and a grams-per-kg target into daily protein, per-meal protein and calorie share.

Formula

Daily protein = body weight kg x grams per kg. Per meal = daily protein / meals. Protein calories = protein grams x 4.

Worked example

80 kg at 1.8 g/kg gives 144 g protein per day, or 36 g across 4 meals.

Professional note

Choose the grams-per-kg target from the goal first, then use the per-meal number to make the target practical.

Regional and unit assumptions

General nutrition planning estimate. Clinical nutrition needs require qualified advice.

Assumptions and limitations

Methodology & Accuracy

How this calculator is checked

CalculationTime pages are built around visible arithmetic: the formula, assumptions, worked example and practical limitations are shown so the result can be checked rather than simply trusted.

Formula used

Daily protein = body weight kg x grams per kg. Per meal = daily protein / meals. Protein calories = protein grams x 4.

Standard or basis

General nutrition planning estimate. Clinical nutrition needs require qualified advice.

Where a calculator follows a named legal, trade or industry standard, that standard is cited visibly. Otherwise the page uses transparent general arithmetic and states its limits.

Master's Tip

Choose the grams-per-kg target from the goal first, then use the per-meal number to make the target practical.

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These cards are resolved from calculator data, category context and live-route status so the page links to useful next steps without hand-built link clutter.

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Questions

Why does protein use body weight?

Protein targets are commonly expressed as grams per kilogram of body weight so the target scales with the person.

Why can carbs fall to zero?

If protein and fat allocations consume the calorie target, no remaining calories are available for carbohydrate in this arithmetic split.

Calculation note

Protein targets are easier to use when converted from grams per kilogram into real daily and per-meal numbers.

Protein intake needs assumptions beside the result

The calculator keeps the input values, formula trail and limitation note visible so the result can be checked later instead of treated as a magic number.

The printable record is part of the calculator

A useful result is one that can be compared with a statement, plan, workout log, timetable or worksheet after the page is closed.