The guide

What the scale will do

By GyroscopeUpdated November 15, 20268 sources

The scale goes up when you start creatine, and it’s water. A loading week usually adds 1 to 3 kg (2 to 7 lb), and then the rise stops. On 3 to 5 g a day the rise is smaller and slower, up to about 2% of your weight over four weeks, and some people see nothing at all.

Three pounds in a week looks like fat to some people and like muscle to others. It’s neither. It’s water that travels into your muscles with the creatine, and it stops arriving once your muscles are full.

The scale is the one place everyone checks, and it’s the one number that can’t tell you whether creatine is working. It goes up for everyone who takes creatine, whether their training improves or not.

It’s like a dry sponge

Drop a dry kitchen sponge in water and it gets heavier straight away. It’s the same sponge, with no more sponge in it. Once it’s soaked, it stops getting heavier however long you leave it. Your muscles take on creatine water the same way, and they stop once they’re full.

Where does the water go?

Mostly into your muscles. Creatine is carried into muscle cells along with sodium, and water follows to keep the balance inside the cell. As your muscle creatine rises, so does the water that comes with it. A liter of water weighs a kilogram (2.2 lb), which is why body water and the scale move together.

The best direct measurement comes from a 2003 trial. Researchers at the University of Virginia gave 32 people who lifted, 16 men and 16 women, either creatine (25 g a day for 7 days, then 5 g a day) or a sugar placebo. They measured body water with a dilution test, where you drink a tracer and the lab measures how far it spreads. Body water rose 1.37 L in the first week and was 2.04 L above where it started by day 28. The share of water inside and outside the cells stayed the same.

There was a puzzle in it. A 1.37 L rise in water should have shown up as about 1.37 kg on the scale, but the creatine group was only 0.75 kg (1.7 lb) heavier at day 7. The researchers couldn’t fully explain it. Both groups took their drinks with about 454 mL (15 oz) of water five times a day that week, and the researchers thought that extra water was the most likely reason even the placebo group’s body water rose by almost 0.9 L.

How much will the scale go up?

Four studies weighed people or measured their body water.

From those four, we built one band for the dose tool and the scale tool. If you load, expect a rise of 1% to 3% of your body weight by day 7, then nothing more. On 3 to 5 g a day, expect 0% to 2%, spread over about four weeks, then nothing more.

This is the band for a 180 lb person who loads, starting on Monday, November 16.

The scale tool draws yours, and plots today’s weigh-in on it.

Why can low doses show nothing at all?

Because the water follows the creatine, and a small dose fills your muscles slowly. In a 2011 trial, 20 young adults took about 2.3 g a day or a placebo for 6 weeks. The creatine group’s weight and body water didn’t change at all. They still held up 7 to 11% better in the later sets of a hard leg test.

That’s a good reminder that the scale and the effect are separate things. You can get the effect with nothing on the scale, and you can get the scale with no effect if you don’t train.

What if you’re losing weight?

Then the first month of creatine can look like a stall. If you’re losing 0.5 to 1 lb of fat a week, a kilogram (2.2 lb) of creatine water can hide two to four weeks of that on the scale. The fat is still going. The scale is showing fat loss minus water gain.

On a diet, skip loading and stay on 3 to 5 g a day, so the water arrives slowly. For the first month, go by your waist measurement and your weekly average weight. bodyfat.guide has a page on whether your plateau is real or water, and a tool for whether you’re losing fat or muscle.

When does the water go away?

While you keep taking creatine, the extra water travels with the stores you’re keeping full. Over longer stretches the picture is mixed, and several training studies lasting 5 to 10 weeks found no rise in total body water at all.

When you stop, it goes. Muscle creatine drifts back to where it started over about a month, 30 days in the 1996 trial and 4 to 6 weeks by the International Society of Sports Nutrition’s count, and the water leaves with it.

Is creatine bloating the same thing?

Usually not. What people call creatine bloat is often the stomach reacting to a big dose. In a 2008 trial, one 10 g dose a day gave 56% of soccer players diarrhea, against 29% on two 5 g doses and 35% on placebo. If your stomach complains, skip loading and split anything over 5 g into two servings.

Does a body scan see the water as muscle?

Often, yes. Body scans that estimate lean mass count water as lean tissue. In a 2025 trial, 5 g a day for one week added 1.1 lb (0.51 kg) of lean mass on a scan, before any training had started. The researchers think most of that was creatine’s water. If you get scanned, do it before you start or wait until you’ve been full for a few weeks.