Creatine Dosage Calculator
Calculate your personalized creatine dosage for loading and maintenance phases based on body weight. Follows International Society of Sports Nutrition (ISSN) guidelines.
Split your daily dose into 4 servings taken throughout the day for 5–7 days.
Increase water intake during creatine supplementation to support hydration.
Dosage based on International Society of Sports Nutrition (ISSN) guidelines
Based on ISSN position stand on creatine supplementation. These are general guidelines and are not a substitute for advice from a qualified healthcare professional.
Understanding Creatine Dosage: A Science-Based Guide
Creatine monohydrate is one of the most extensively researched and widely used dietary supplements in sports nutrition. The International Society of Sports Nutrition (ISSN) has reviewed hundreds of studies and concluded that creatine monohydrate is effective for increasing high-intensity exercise capacity and lean body mass during training. Understanding proper dosing is essential for maximizing these benefits while using the supplement efficiently.
The Loading Phase
The loading protocol is designed to rapidly saturate muscle creatine stores. According to ISSN guidelines, a loading dose of approximately 0.3 grams per kilogram of body weight per day is recommended. This dose is divided into four equal servings taken throughout the day to improve absorption and reduce potential gastrointestinal discomfort. For a 70 kg individual, this equates to roughly 21 grams per day, split into four servings of about 5.25 grams each.
The loading phase typically lasts five to seven days. Research suggests that muscle creatine stores become fully saturated within this timeframe when following the recommended dosing protocol. Some individuals may experience mild water retention during loading, which is a normal physiological response to increased intramuscular creatine storage.
The Maintenance Phase
After completing the loading phase, a lower daily dose is sufficient to maintain elevated muscle creatine levels. The ISSN recommends a maintenance dose of approximately 0.03 grams per kilogram of body weight per day, which typically falls in the range of 3 to 5 grams daily. Unlike the loading phase, the maintenance dose can be taken as a single serving at any time of day.
The maintenance phase continues for as long as an individual wishes to supplement with creatine. Research has shown that long-term creatine supplementation at recommended doses appears to be safe for healthy adults, with studies extending up to five years finding no adverse effects on kidney or liver function in individuals without pre-existing conditions.
Skipping the Loading Phase
An alternative approach is to skip the loading phase entirely and begin directly with the maintenance dose of 3 to 5 grams per day. This method will eventually achieve the same level of muscle creatine saturation, but it takes approximately 28 days instead of five to seven. This approach may be preferred by individuals who experience gastrointestinal discomfort during loading or who simply prefer a more gradual approach.
Hydration During Supplementation
Creatine draws water into muscle cells as part of its mechanism of action. For this reason, maintaining adequate hydration is important during supplementation. General recommendations suggest consuming at least 3 to 4 liters of water per day while supplementing with creatine, though individual needs may vary based on activity level, climate, and body size. Dehydration during creatine use may increase the risk of cramping, though research on this topic remains inconclusive.
Who Should Consult a Professional
While creatine is generally well-studied and considered safe for healthy adults, certain individuals should consult a healthcare provider before beginning supplementation. This includes people with pre-existing kidney or liver conditions, those taking medications that affect kidney function, adolescents under 18, and pregnant or breastfeeding individuals. The dosage recommendations provided by this calculator are general guidelines based on published research and should not replace personalized medical advice.
Frequently Asked Questions
Is the loading phase necessary?
The loading phase is not strictly necessary. You can achieve full muscle creatine saturation by taking the maintenance dose of 3–5 g/day, but it takes about 28 days instead of 5–7 days. Loading simply saturates your muscles faster, which may be preferred if you want to see effects sooner.
When should I take creatine?
Research suggests that timing is less important than consistency. During the loading phase, spread your doses evenly throughout the day. During maintenance, take your single dose at any convenient time. Some studies suggest a slight advantage to post-workout timing, but the difference is minimal compared to daily consistency.
Does creatine cause water retention?
Creatine does increase intracellular water content in muscles, which can result in a small weight increase of 1–3 kg during the loading phase. This is water stored within muscle cells, not subcutaneous bloating. The effect is part of creatine’s mechanism and contributes to its performance benefits.
Is creatine safe for long-term use?
According to the ISSN, long-term creatine supplementation at recommended doses appears to be safe for healthy adults. Studies lasting up to five years have not found adverse effects on kidney or liver function in individuals without pre-existing conditions. However, those with kidney issues should consult a healthcare provider first.
Should I cycle on and off creatine?
There is no scientific evidence suggesting that cycling creatine is necessary. The body does not develop a tolerance to creatine, and continuous supplementation at the maintenance dose maintains elevated muscle creatine stores without diminishing returns.