What is calculated
Daily protein, even protein per meal, grams per kilogram per meal, and even spacing across a waking window.
Protein Timing Calculator
Even protein amount per meal
Enter your values, then calculate to see a verified result.
Reference range
How this result is calculated
A clear calculation path based on your inputs.
Inputs usedReview the information used for this result.
Full calculation and sourcesReview the equation, normalized inputs, assumptions, and version.
Versioned calculationFormula v1.0.0
Method
Multiply weight by an editable daily factor, divide by meals, and divide the waking interval by meal gaps.
Important boundary
Evidence for an exact anabolic window or one optimal distribution is limited and context dependent.
Set the daily totalMultiply body weight by the selected daily factor.
80 x 1.6 = 128 g/day.Divide across mealsSplit the daily total evenly.
128 / 4 = 32 g/meal.Space the mealsDivide the eating window across the gaps between meals.
15 / 3 = 5 hours.Interpretation
g is the even amount per selected meal.
Spacing is a planning convenience, not an exact anabolic-window rule.
Daily total and clinical context remain more important than false timing precision.
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Related calculators and resources
Method and test recordFormula v1.0.0
- Recorded scope
- health-nutrition-goals
- Publisher
- CalculatorGeek
- Recorded review date
- 2026-10-04
- Next source review
- 2027-10-04
- Definition fixtures
- 3 configured scenarios
- Published examples
- 3 shown below
Recorded method
Verify weight-unit parity, daily target, per-meal division, spacing denominator, and research-context outputs.
These records describe the published model and reference tests. A test-case count is not a certification of every possible input or an independent specialist review. Editorial policy
Known limitations
- Even distribution is not proven superior for every outcome or person.
- Protein quality, mixed meals, age, training, energy balance, and medical conditions affect interpretation.
- The 0.40 to 0.55 g/kg values are research context, not a hard absorption limit.
- No exact pre- or post-workout window is prescribed.
Method sources
- Schoenfeld and Aragon: protein per meal and daily distribution review
- Jespersen and Agergaard: systematic review of protein distribution
- Morton et al.: protein supplementation and resistance-training meta-analysis
Latest model update
2026-10-04 - Initial shared-system implementation with distinct workflow, evidence boundaries, fixtures, and authored support content.
Reference inputs and expected results
Up to 12 examples from the configured definition fixtures are shown. Expected values use the stated output units; invalid inputs are intended to be rejected.
| Case | Inputs | Expected result |
|---|---|---|
| four meal reference | Body weight: 80 kg; Selected daily protein factor: 1.6 g/kg; Protein-containing meals: 4 count; Waking eating window: 15 hours | Selected daily protein: 128 g/day; Even protein per meal: 32 g; Even amount per kilogram per meal: 0.4 g/kg/meal; Even interval between meals: 5 hours; 0.55 g/kg meal context: 44 g (allowed numeric tolerance: 0.0001) |
| imperial parity | Body weight: 176.36981 lb; Selected daily protein factor: 1.6 g/kg; Protein-containing meals: 4 count; Waking eating window: 15 hours | Selected daily protein: 128 g/day; Even protein per meal: 32 g (allowed numeric tolerance: 0.01) |
| invalid meal count | Body weight: 80 kg; Selected daily protein factor: 1.6 g/kg; Protein-containing meals: 1 count; Waking eating window: 15 hours | Reject invalid input: meals |
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On this page
What the Protein Timing Calculator answers
Distribute an explicitly selected daily protein target across meals and an entered waking window.
The calculator shows per-meal g/kg context without calling 0.55 g/kg an absorption cap or claiming one timing pattern is universally optimal.
Use the Health calculators hub to move between nutrition and body-composition workflows.
How to use the Protein Timing Calculator
- Enter body weight.
- Choose the daily protein factor from the broader plan.
- Choose the number of protein-containing meals.
- Enter the first-to-last meal window and review the even split.
For the closest upstream calculation, open the Protein Calculator. Choose a daily protein range first.
Formula, variables and calculation order
daily protein = body weight x selected g/kg/day.
protein per meal = daily protein / meals; spacing = waking window / (meals - 1).
The 0.40 to 0.55 g/kg per-meal values are displayed as research context, not a maximum absorption threshold.
To compare the method with a neighboring workflow, use the Macros Per Meal Calculator. Distribute all three macros across meals.
Worked example and boundary check
80 kg, 1.6 g/kg/day, four meals
Daily protein is 128 g, the even split is 32 g or 0.40 g/kg per meal, and a 15-hour first-to-last meal window gives 5-hour intervals.
Boundary check
At least two meals are required because spacing across zero meal gaps is undefined.
How to interpret the result
The primary result is an even division of the selected daily total. It should be adjusted to actual meals, appetite, training, and professional guidance.
- Even distribution is not proven superior for every outcome or person.
- Protein quality, mixed meals, age, training, energy balance, and medical conditions affect interpretation.
- The 0.40 to 0.55 g/kg values are research context, not a hard absorption limit.
- No exact pre- or post-workout window is prescribed.
For another useful cross-check, continue with the Lean Bulk Calculator. Combine protein with a surplus and full macro plan.
Inputs, outputs and result meaning
Separates daily target choice from meal distribution, shows research context, and rejects a universal anabolic-window or absorption-cap claim.
Inputs
- Body weight
- Use a current measured body weight.
- Selected daily protein factor
- Choose the daily factor from your broader nutrition plan; the calculator does not prescribe it.
- Protein-containing meals
- Used for an even arithmetic division.
- Waking eating window
- Enter the hours from the first to last planned protein-containing meal.
Outputs
- Even protein per meal
- Primary result in g.
- Selected daily protein
- Supporting result in g/day.
- Even amount per kilogram per meal
- Supporting result in g/kg/meal.
- Even interval between meals
- Supporting result in hours.
- 0.40 g/kg meal context
- Supporting result in g.
- 0.55 g/kg meal context
- Supporting result in g.
Frequently asked questions
Is 0.55 g/kg a maximum the body can absorb?
No. The research context concerns muscle-protein-synthesis response, not total digestion or absorption.
Is even distribution proven best?
Evidence is mixed; total daily protein and overall diet remain central.
Where is the workout window?
This calculator avoids prescribing an exact window because the evidence does not support one universal deadline.
Can meals be uneven?
Yes. The displayed split is a planning baseline, not a requirement.
What if I have kidney disease?
Use individualized medical nutrition guidance rather than a general high-protein planner.
Primary sources and evidence limits
- Schoenfeld and Aragon: protein per meal and daily distribution review
- Jespersen and Agergaard: systematic review of protein distribution
- Morton et al.: protein supplementation and resistance-training meta-analysis
Sources were checked 2026-10-04. They support the calculation method or its evidence boundary; they do not turn a planning scenario into medical nutrition advice.