Creatine Dosage Calculator
Calculate your personalized daily creatine dose for either the loading or maintenance phase based on your body weight. Use this before starting a creatine protocol to avoid under-dosing or unnecessary excess.
About this calculator
Creatine is one of the most researched sports supplements, shown to increase phosphocreatine stores in muscle, enhancing ATP regeneration during high-intensity efforts. Dosage recommendations are weight-dependent because larger muscle mass has greater storage capacity. The formula used is: daily_dose (g) = (weight_kg / 1000) × 3 + phase_bonus, where phase_bonus = 10 g during a loading phase and 3 g during maintenance. The loading phase (typically 5–7 days) rapidly saturates muscle creatine stores, while the maintenance phase sustains those elevated levels. For a 75 kg person loading: (75 / 1000) × 3 + 10 = 0.225 + 10 = 10.225 g/day. In maintenance: (75 / 1000) × 3 + 3 = 3.225 g/day. Note that skipping the loading phase and going straight to maintenance simply delays full saturation by 3–4 weeks but achieves the same endpoint.
How to use
Example: You weigh 80 kg and are starting a loading phase. Step 1: Enter 80 in Body Weight and select 'loading' for Supplementation Phase. Step 2: The calculator applies: (80 / 1000) × 3 + 10 = 0.24 + 10 = 10.24 g/day. Step 3: Take approximately 10.24 g of creatine monohydrate daily for 5–7 days. Step 4: Switch to maintenance mode — the formula gives (80 / 1000) × 3 + 3 = 3.24 g/day — and continue this dose indefinitely to maintain saturated muscle stores.
Frequently asked questions
Is a creatine loading phase necessary or can I skip straight to maintenance?
The loading phase is not strictly necessary — it simply accelerates the time to full muscle saturation from about 3–4 weeks down to 5–7 days. If you start with maintenance dosing only, your muscles will still reach the same fully saturated state, just more gradually. Athletes who need immediate performance benefits for an upcoming competition may prefer the loading approach. For most recreational lifters with no time pressure, skipping loading is perfectly valid and avoids potential gastrointestinal discomfort that higher loading doses can sometimes cause.
How does body weight affect the optimal creatine dose?
Creatine is stored in skeletal muscle, so individuals with greater muscle mass — which generally correlates with higher body weight — can store more total creatine and therefore benefit from slightly higher doses. The standard research-backed maintenance recommendation of 3–5 g/day is a flat figure suitable for average body weights, but weight-adjusted dosing offers more precision. Heavier athletes with significant muscle mass may under-saturate their stores on a flat 3 g dose, while lighter individuals may not need as much. This calculator refines the estimate by anchoring dose to your actual weight.
What is the best time of day to take creatine for maximum effectiveness?
Research does not strongly support one specific time as definitively superior, but studies suggest that taking creatine close to your workout — either immediately before or after — may produce marginally better results than taking it at an unrelated time. Post-workout creatine, combined with a carbohydrate and protein source, may enhance uptake due to insulin-mediated transport into muscle cells. On rest days, timing matters less; consistency of daily intake is more important than the specific hour. Splitting loading-phase doses across 2–4 servings throughout the day can also reduce gastrointestinal discomfort.