Creatine Calculator
Estimate your daily creatine monohydrate dose from body weight and training goal — plus what to expect from loading, hydration, and consistency.
What creatine is
Creatine is a compound your body makes from amino acids and stores mainly in skeletal muscle, where it helps regenerate adenosine triphosphate (ATP) — the molecule that powers short, intense efforts.
Creatine monohydrate is the most studied form. Decades of trials show it safely raises muscle creatine stores when taken daily at a modest dose.
How the calculation works
A practical maintenance dose is roughly 0.04 grams of creatine monohydrate per kilogram of body weight per day, with a small bump when the goal is muscle gain.
The calculator clamps the result to a 3–10 g/day range — the window where research consistently shows benefit without offering diminishing returns.
- Body weight (kg) × 0.04 = baseline daily dose
- +0.5 g/day when the goal is muscle gain
- Optional loading: ~0.3 g/kg/day split across 4 servings for 5–7 days
How to read your result
Most adults land between 3 and 5 grams per day. Larger athletes or those bulking may sit at 5–7 g/day.
Loading is optional: 20 g/day for 5–7 days saturates muscle creatine in under a week, but a steady 3–5 g/day reaches the same level in 3–4 weeks with fewer gastrointestinal complaints.
Benefits backed by research
- Greater strength and power output during resistance training
- Modestly higher lean-mass gains over weeks of training
- Better performance in short, high-intensity efforts and sprints
- Faster between-set recovery in the gym
- Emerging evidence for cognitive performance under sleep deprivation
Common mistakes
- Skipping days — creatine works through saturation, not acute timing
- Cycling on and off without a reason; daily intake is the proven pattern
- Choosing exotic forms (HCl, ethyl ester) when monohydrate is cheaper and better studied
- Confusing intramuscular water with fat gain
- Under-dosing in larger athletes who need 5–7 g/day
Practical recommendations
- Take your daily dose with any meal or drink — timing is not critical
- Mix into water, juice, or a protein shake
- Stay well hydrated; creatine pulls water into muscle cells
- Pair with resistance training to see the largest performance effect
- Pick a plain creatine monohydrate product with a third-party purity seal
Related calculators
Frequently asked questions
Bottom line
Creatine monohydrate is one of the most effective and safest legal supplements available. A daily dose of 3–5 g — adjusted upward for larger bodies or muscle-gain phases — covers the vast majority of trained adults.
Consistency over weeks matters more than any single dose, brand, or timing trick.