Descale the kettle with citric acid - that's how it works

Kettles are always the first victims of hard water. Regular descaling is therefore essential in most households. How to descale the kettle with citric acid, what dosage to use and what to pay attention to, read here.

Descaling of kettles

Since water is heated in a kettle, the susceptibility to limescale is very high, especially in the area of ​​heating elements. From the hot water, a large part of the hardness is deposited and immediately accumulates.

The decalcification with vinegar or vinegar essence is rather unpleasant with the kettle, because the stinging vinegar smell is often disturbing. Citric acid is the better alternative, but you have to pay attention to a few things.

Important in the application

  • never heat!
  • observe correct dosage
  • Observe contact time
  • rinse thoroughly


Citric acid solutions must not be heated. If the solution is hot, it combines with the existing lime to form a calcium-citrate complex. This form of deposition can then be removed with no means. Citric acid must only be used cold or with a maximum of lukewarm for descaling!

Proper dosage

Overly concentrated acids can attack plastic parts. The right dosage to descale kitchens of the usual size is 1 - 2 tablespoons of citric acid powder per liter of water. Never give more than 3 tablespoons of citric acid to one liter of water!


The exposure time always depends on the degree of deposits present. The more limescale deposits are present, the longer the exposure time should be. However, citric acid should not be allowed to work for more than a few hours, and the concentration should be reduced slightly for longer exposure times. Devices can otherwise be damaged.

Thorough rinsing

After descaling, the kettle must be thoroughly rinsed several times with clear water to neutralize the remainder of the acid. On the rinse you can not do without!

Tips & Tricks

You can buy citric acid in larger quantities than powder - usually that is cheaper. The kilo price is usually in the range of 4 - 5 EUR per kg for larger purchase quantities.

Video Board: Descaling a kettle