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Hydration estimate

How much water should you drink on creatine?

Estimate a sensible daily range from body weight, exercise and heat. Creatine itself does not justify an invented “extra litre” rule.

The honest answer

There is no well-established formula that adds a fixed amount of water for every gram of creatine. Hydration needs are driven more directly by body size, sweat loss, activity, climate, diet and health status. This calculator therefore estimates general total beverage needs rather than claiming a creatine-specific requirement.

Important: this is a broad planning range, not a clinical fluid prescription. Food also contributes water, so your beverage intake does not need to equal total water intake reported in population guidelines.

How the estimate works

  • Baseline: 30–35 mL per kg of body weight.
  • Exercise allowance: 350–500 mL per 30 minutes as a broad starting range.
  • Optional hot-condition allowance selected by you.

Sweat rates vary substantially. For long or intense sessions, weighing yourself immediately before and after training can provide a more individualized estimate. Avoid trying to “catch up” by drinking extreme amounts rapidly.

Need a creatine dose as well?

Hydration and supplement dose are separate questions. Use the creatine dose calculator for optional loading and maintenance ranges; use the estimate on this page for beverages. Review the formulas and limitations before treating either result as a target.

Sources

  1. National Academies. Dietary Reference Intakes for Water and Electrolytes, 2005.
  2. Sawka MN et al. ACSM position stand: Exercise and fluid replacement, 2007.
  3. Antonio J et al. Common questions and misconceptions about creatine supplementation, 2021.

Reviewed: August 16, 2026. See our methodology.