Quick answer
Creatine monohydrate dissolves slowly: about 14 g per liter of water at 20 °C, 34 g at 50 °C and 45 g at 60 °C. By that arithmetic a 5 g serving needs about 360 mL of room-temperature water, less when warm. Dissolved creatine slowly turns into creatinine, so a drink is best mixed close to when it is drunk.1,2
Key facts
- One liter of water dissolves about 6 g of creatine at 4 °C, 14 g at 20 °C, 34 g at 50 °C and 45 g at 60 °C.1
- By that solubility, a 5 g serving needs about 830 mL of cold water (4 °C), 360 mL at 20 °C or 150 mL at 50 °C to dissolve fully. These are our calculations.1
- Creatine powder showed no sign of breakdown after more than 3 years at room temperature or 40 °C, but creatine in a drink degrades faster as the liquid gets more acidic or warmer.1,2
- After 3 days at 25 °C, creatine in solution had lost 4% at pH 5.5, 12% at pH 4.5 and 21% at pH 3.5.1,2
- Forms of creatine that dissolve more easily have not been shown to be taken up better, or to be more stable or safer, than monohydrate.3
How to mix creatine with water: how much water does it need?
Creatine monohydrate does not dissolve quickly or in unlimited amounts. A review of the chemistry reports how much one liter of water can hold at different temperatures. Dividing a serving by that figure gives the least water that can hold it, which is the number in the last column.1
| Water temperature | Creatine that dissolves per liter | Water to dissolve 5 g (our arithmetic) |
|---|---|---|
| 4 °C (39 °F), refrigerator cold | 6 g | about 830 mL (28 US fl oz) |
| 20 °C (68 °F), room temperature | 14 g | about 360 mL (12 US fl oz) |
| 50 °C (122 °F), very warm | 34 g | about 150 mL (5 US fl oz) |
| 60 °C (140 °F), hot | 45 g | about 110 mL (3.8 US fl oz) |
Scale the last column to your label. A 3 g serving needs about 215 mL at 20 °C (3 divided by 14, times 1,000), and a 10 g amount needs twice what a 5 g serving does.1
Why does creatine powder stay gritty in cold water?
The table also explains the grit. A 200 mL glass of room-temperature water can hold about 2.8 g of creatine (14 g per liter times 0.2), so a full 5 g scoop cannot all dissolve in it, and a glass from the refrigerator holds even less. Undissolved grains settle at the bottom. More water, warmer water or splitting the serving across two glasses changes the arithmetic. The sources we read do not say whether undissolved grains matter for how much the body takes up, so we make no claim either way.1
One more number from the same review: creatine monohydrate dissolves at 14 g per liter at 20 °C into a liquid with a neutral pH of 7. Salts of creatine that lower the pH dissolve more, which is the trade described in the next section.1
How long does mixed creatine last?
Dry powder and a dissolved drink behave very differently. The review found no breakdown product in monohydrate powder after more than 3 years at room temperature or at 40 °C. In water, creatine slowly cyclizes into creatinine, and the rate depends on pH and temperature rather than on how much is dissolved.1
The tested losses after 3 days at 25 °C were 4% at pH 5.5, 12% at pH 4.5 and 21% at pH 3.5, while at neutral pH (6.5 to 7.5) creatine was relatively stable. The authors advise that a drink not consumed immediately be stored cold. Those are multi-day figures, and we found no study that measured a drink left for only minutes or hours.1,2
A more acidic drink sits lower on that scale and loses more, which is why our guide to what to mix with creatine suggests adding the powder close to drinking time. Brewed coffee measured about pH 4.8 to 5.6 in the figures we found, which overlaps that span and is covered in our creatine and coffee guide.1,4
How to mix creatine monohydrate versus other forms
Creatine monohydrate is 88% creatine by weight and is the most widely used and studied form.3
Other, usually more expensive forms such as creatine ethyl ester and buffered creatine have not been shown to raise muscle creatine better than monohydrate, or to be easier to digest, more stable or safer.3
Marketing for other forms often leads with easier mixing. That is true of some salts, which dissolve more because they lower the pH of the water. The ISSN position stand calls claims that other forms degrade less or are taken up better unfounded, and a lower pH is the condition under which dissolved creatine breaks down fastest.1,2
Does the amount of water matter beyond dissolving the powder?
NIH notes reports that creatine may reduce range of motion and cause muscle stiffness, and says drinking enough fluid might lessen these uncommon effects.3
A review of 10 controlled trials found no evidence that creatine at recommended amounts hinders heat tolerance or fluid balance in athletes exercising in the heat.5
That makes fluid intake a question for the whole day, not only the glass the scoop goes into. If you take medicines that affect the kidneys, or have kidney disease, ask a doctor about creatine before changing how much you drink.3,5
Questions people ask
How to mix creatine with water?
Creatine monohydrate dissolves at about 14 g per liter at 20 °C, so a 5 g serving needs roughly 360 mL to dissolve fully. Warmer water dissolves more per liter.1
How to mix creatine properly?
Use enough water for the amount of powder and drink the mix soon after, since dissolved creatine slowly becomes creatinine, faster in acidic or warm liquid.1,2
How to mix creatine powder?
Stir the measured serving into liquid until the powder has dissolved. If grains remain in a cold drink, the amount may exceed what that volume can hold, for example about 2.8 g in 200 mL at 20 °C.1
How to mix creatine monohydrate?
Monohydrate is the form most studied and it dissolves at about 14 g per liter at 20 °C into a neutral-pH liquid. Forms that dissolve more easily have not been shown to work better.1,3
How to mix creatine with coffee?
No study measured creatine lost in coffee. The one trial that mixed creatine with coffee used 8.9 g of coffee providing 303 mg of caffeine; see our guide to creatine in coffee.6
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Sources
- Jager R, Purpura M, Shao A, Inoue T, Kreider RB. Analysis of the efficacy, safety, and regulatory status of novel forms of creatine. Amino Acids. 2011;40(5):1369-1383. Review. Opened 2026-10-11.
- Kreider RB, 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. Opened 2026-10-01.
- National Institutes of Health, Office of Dietary Supplements. Dietary Supplements for Exercise and Athletic Performance: Fact Sheet for Health Professionals. Updated April 1, 2024. Opened 2026-10-06.
- Cordoba N, Pataquiva L, Osorio C, Moreno FLM, Ruiz RY. Effect of grinding, extraction time and type of coffee on the physicochemical and flavour characteristics of cold brew coffee. Sci Rep. 2019;9:8440. Opened 2026-10-11.
- Lopez RM, et al. Does creatine supplementation hinder exercise heat tolerance or hydration status? A systematic review with meta-analyses. J Athl Train. 2009;44(2):215-223. Opened 2026-10-07.
- Trexler ET, Smith-Ryan AE, Roelofs EJ, Hirsch KR, Persky AM, Mock MG. Effects of Coffee and Caffeine Anhydrous Intake During Creatine Loading. J Strength Cond Res. 2016;30(5):1438-1446. Randomized trial, 54 men. Opened 2026-10-11.
This page is information, not medical advice. Talk to your doctor or pharmacist about your own situation.