Do I need a loading phase?

No. Loading can saturate stores faster, but many people do fine with a steady maintenance dose and a little more patience.

When should I take creatine?

Timing matters less than consistency. The best time is the time you will actually remember to take it every day.

Why does body weight matter here?

Because bigger athletes often respond better to slightly higher doses, especially during a loading phase.

Is more always better?

No. Past a sensible dose, extra creatine does not keep adding benefit and may only increase stomach discomfort.

Is this tool free and private to use?

Yes. AI Fit Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.

Do these tools replace medical guidance?

No. These outputs are general fitness estimates — not medical advice.

Methodology: Creatine Intake Calculator

Scope

Estimates creatine maintenance and optional loading doses from bodyweight and training frequency.

Formula

maintenance_g = 0.03 * bodyweight_kg (capped at 5 g for most lifters). loading_g = 0.3 * bodyweight_kg / day for 5–7 days (optional).

Coefficients

Parameter	Value	Note
Maintenance	`3–5 g/day (typical)`
Loading	`0.3 g/kg/day for 5–7 days`

Data sources

Kreider RB, Kalman DS, Antonio J, et al. International Society of Sports Nutrition position stand: safety and efficacy of creatine supplementation in exercise, sport, and medicine. J Int Soc Sports Nutr. 2017;14:18. — PMID 28615996. ISSN consensus on creatine dosing, loading, and safety.
Hultman E, Söderlund K, Timmons JA, et al. Muscle creatine loading in men. J Appl Physiol (1985). 1996;81(1):232-237. — PMID 8828669. Original loading-phase dose-response study.
Avgerinos KI, Spyrou N, Bougioukas KI, Kapogiannis D. Effects of creatine supplementation on cognitive function of healthy individuals: a systematic review and meta-analysis. Exp Gerontol. 2018;108:166-173. — Modern meta-analysis on non-exercise benefits.

Assumptions

Creatine monohydrate; other forms offer no documented benefit at comparable doses.

Approximation range

Saturation reached in ~28 days at 3–5 g/day without loading.

Limitations

People with kidney disease should consult a physician before supplementing.

Reproducibility

80 kg lifter, no loading: 0.03 * 80 = 2.4 g; rounded to 3 g/day. Optional loading: 24 g/day split into 4 doses for 5 days.

Change log

2026-04-24: methodology page first published.

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Protein Intake Calculator — Get daily protein targets based on training level and goal.

Worked example

Computed by the same engine bundle served at /engines/creatine-intake-calculator.js. Re-runnable: the values below are the literal output of compute(engineInput).

Input

tool: creatine_intake
body_weight_kg: 82
protocol: maintenance
loading_phase_days: 7
training_days_per_week: 4

Output

primaryLabel: Maintenance creatine dose
primaryValue: 3
primaryFormat: grams
summary: Dose estimate scales by body weight and training frequency.
metrics: [{"label":"Loading dose","value":0,"format":"grams"},{"label":"Monthly creatine needed","value":90,"format":"grams"},{"label":"5g scoops / month","value":18,"format":"number"},{"label":"Hydration baseline","value":2.87,"format":"liters"}]
warnings: []
assumptionsEcho: {"body_weight_kg":82,"protocol":"maintenance","loading_phase_days":7,"training_days_per_week":4}

FAQ

Do I need a loading phase?: No. Loading can saturate stores faster, but many people do fine with a steady maintenance dose and a little more patience.
When should I take creatine?: Timing matters less than consistency. The best time is the time you will actually remember to take it every day.
Why does body weight matter here?: Because bigger athletes often respond better to slightly higher doses, especially during a loading phase.
Is more always better?: No. Past a sensible dose, extra creatine does not keep adding benefit and may only increase stomach discomfort.
Is this tool free and private to use?: Yes. AI Fit Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Do these tools replace medical guidance?: No. These outputs are general fitness estimates — not medical advice.