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How much water should you drink on creatine?
Drink your normal daily amount plus about 500 ml (17 oz), and have a glass of water with each dose. There's no official creatine water rule, so here's what the research actually says.
Updated October 17, 2026
Why creatine changes your water needs
Creatine pulls water into your muscle cells. That's part of how it works, and it's why many people gain 1–2 kg in the first week of loading: it's water in the muscle, not fat. Your body holds more water overall, so it makes sense to give it a little more.
Does creatine dehydrate you?
No. This is one of the most common worries, and the research doesn't back it up. The International Society of Sports Nutrition's position stand found no evidence that creatine causes dehydration or cramps, and a 2021 review of common creatine myths reached the same conclusion. Some studies in athletes even saw fewer cramps and heat problems in the creatine group.
So the extra 500 ml isn't a medical requirement. It's a sensible buffer that covers the water your muscles are now holding and makes up for training harder.
Loading vs maintenance
| Phase | Typical creatine dose | Water |
|---|---|---|
| Loading (5–7 days) | About 20 g a day, split into 4 doses | A glass (250–350 ml) with each dose, on top of your daily amount |
| Maintenance | 3–5 g a day | A glass with your dose, plus about 500 ml extra across the day |
Plenty of people skip loading and take 3–5 g from day one. It takes a few weeks longer to fill your muscles, with less of the early water weight.
Quick reference
| Weight | Without creatine | With creatine | With creatine, training daily |
|---|---|---|---|
| 50 kg (110 lb) | 1.6 L | 2.1 L (73 fl oz) | 2.9 L |
| 60 kg (132 lb) | 2.0 L | 2.5 L (84 fl oz) | 3.2 L |
| 70 kg (154 lb) | 2.3 L | 2.8 L (95 fl oz) | 3.5 L |
| 80 kg (176 lb) | 2.6 L | 3.1 L (106 fl oz) | 3.8 L |
| 90 kg (198 lb) | 3.0 L | 3.5 L (117 fl oz) | 4.2 L |
| 100 kg (220 lb) | 3.3 L | 3.8 L (128 fl oz) | 4.5 L |
Watch your pee: pale yellow is the goal. Dark yellow, headaches or feeling thirsty all day mean you need more.
This is general guidance for healthy adults, not medical advice. If you have kidney, heart or liver problems, take medicines that affect fluid balance, or have been told to limit fluids, follow your doctor's advice instead.
Questions people ask
Do I need to drink a gallon of water on creatine?
No. A gallon (3.8 litres) is fine for large or very active people, but most people do well with their normal daily amount plus about 500 ml.
Does creatine make you retain water?
Yes, inside your muscles. That's normal and part of how it works. It usually shows up as 1–2 kg on the scale in the first week of loading and then levels off.
Can I take creatine without drinking much water?
It still works, but you'll feel better and train better if you're well hydrated. Have a glass with each dose and hit your daily amount.
Is creatine bad for your kidneys?
In healthy people, studies at normal doses haven't found kidney harm. If you already have kidney disease, talk to your doctor before taking it.
Sources
- Kreider et al.: ISSN position stand on the safety and efficacy of creatine supplementation (2017)
- Antonio et al.: Common questions and misconceptions about creatine supplementation (JISSN, 2021)
- National Academies of Sciences: Dietary Reference Intakes for Water, Potassium, Sodium, Chloride, and Sulfate (2005)
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