Last updated: August 7, 2021
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Cats are extremely willful animals. They come and go as they please. If the cat then stands in front of closed doors, it will make itself heard loudly. However, with the right methods, training your cat is no problem. In this way, your cat can also be trained to recognise and use its own cat flap.

This should work: Cat flaps offer you an optimal and effective solution. The cat can decide independently about its own entry and exit.

Our large cat flap guide informs you about the most important solutions currently available. Different systems and models are examined. To make your decision easier, you will find our product recommendations, our purchase criteria, our price table and our answers to questions that will arise in the course of this guide.


  • Cats need space and usually want to be self-sufficient. However, they are often faced with closed doors.
  • Cat flaps offer a variety of solutions and systems that can grant your cat entry and exit via microchip, purely mechanical or other techniques.
  • It is important to know in advance where you want to install the cat flap, as materials such as glass or masonry require their own installation specifications.

The best Cat Flap: Our Picks

Buying and evaluation criteria for wireless surveillance cameras

The following factors can show you how different cat flaps can be compared and evaluated. In this way, we would like to make it easier for you to choose the right cat flap:

How decisive these criteria are for you and your preferences, we will explain in more detail below.

Locking system

Deciding on the locking system is essential to choosing the right product. The magnetic cat flap can only allow cats to enter that have the appropriate magnetic key for it. However, foreign cats with a magnetic key can also enter. In order to keep strange animals out, it is therefore advisable to refrain from using mechanical doors.

Cat flaps with microchips offer a high degree of security and discretion. Only animals with the stored chip can enter the house via such cat flaps.

Installation possibilities

Not every cat sluice is suitable for every installation possibility. If installations in thicker walls would like to be made it is important that possible tunnel extensions are available. Also installations in glass need flap systems intended for it. Microchip cat flaps can be installed in glass, doors and walls.

External dimensions / passage size

After the choice of installation material, the external dimensions of the flap play an important role. It is important to know exactly where the flap is to be installed. The outer dimensions also play an important role for the cat. If they do not fit or seem too small, the cat may refuse the flap. If there is already a hole from previous cat flaps, it is also important to determine the correct outer dimensions.

Adjustable closure

Many cat flaps have different entrance and exit options. There are 2-way and 4-way closure systems. 2-way systems only allow the flap to open and close permanently. In contrast, 4-way systems have the option of closing flaps directionally.

Timer control

Timers offer the possibility of activating damper systems automatically. Such a function is often connected with access to electricity, so that especially chip-controlled cat flaps are equipped in this way. Cats can thus find their way out and in with little manual effort.

Power supply

Generally a current supply is needed only with chip-controlled or electromagnetic cat flaps so that the product is operational. Here you can choose between a mains- or battery-operated system. With a device with mains operation a plug socket is to be occupied, which is available best possible in the proximity of the installation. The alternative is a battery-operated damper, which usually promises a battery life of up to one year. In the event of a power failure, the flap also remains in operation so that the cat can continue to enter and exit.

Guide: Frequently asked questions about cat flaps answered in detail

In the following, the most frequently asked questions in connection with cat flaps are answered in detail, so that the choice of the product is even easier.

How big should a cat flap be?

In order for your cat flap to work, you should choose the right size for your pet. The body size of the cat plays an important role.

Size Dimensions
S total: 298,7 x 201,6 mm
Cutting area: 245 x 150 mm
max. shoulder width: 132 mm
max. weight: 7 kg
M overall: 400 x 277.6 mm
Cutting area: 348 x 225 mm
max. shoulder width: 209 mm
max. weight: 18 kg
L total: 502.6 x 329.1 mm
Cutting area: 451 x 277 mm
max. shoulder width: 260 mm
max. weight: 45 kg
XL total: 692.6 x 417 mm
Cutting area: 642 x 366 mm
max. shoulder width: 349 mm
max. weight: 100 kg

A tape measure or the vet can help here. Measure the width of the shoulders and the length between the front paws and the head of the cat.

How tight are cat flaps?

Thermal insulation should not be neglected when installing the cat flap. In order to save heating costs, care should be taken during installation that the cat flap is installed in an unheated room.


To ensure that the cat flap not only pleases the cat, but also you, it is important to know the correct dimensions required.(Photo: Aleksandr Nadyojin / Pexels)

We can recommend the cellar window, the cellar door or the hallway. When choosing a model, you can also choose products that have more effective insulation and sealing.

How high should the cat flap be installed?

The lower edge of the flap opening should be mounted approximately at the belly height of the cat.
If this is not possible for structural reasons, the cat flap can also be mounted somewhat higher.

Can a cat flap also be installed in a rented flat?

Windows and doors are the property of the landlord and should remain unchanged unless expressly approved in writing. Alternatively, Plexiglas panes with specially fitted cat flaps can be installed. This eliminates the need to cut holes in doors, walls or windows.

How expensive is a cat flap?

Different manufacturers offer cat flaps with different systems. The price of such flaps varies differently. Very simple flaps with a swinging door are generally cheaper than those that are programmable. High-quality materials and special requirements for thermal insulation and density also play a decisive role.

Type price segment
Simple equipment 10 to 20 euros
Medium equipment 20 to 40 euros
Higher equipment from 40 euros

Simple cat flaps without magnetic closure are priced between 10 and 20 Euros. Flap mechanisms with magnetic locks and special seals are between 20 and 40 Euros, whereas flaps with sensors for chips are available from 40 Euros.


Cat flaps offer you an elegant and convenient solution for you and your pet. It is important to remember that not every cat flap is suitable for every place and for every animal. Technically, there are many different options, but of course it depends on your own preferences and ideas.

Picture: Burrell / Pexels