Why Do Korean Elevators Skip the 4th Floor and Use F?

Many Korean elevators show "F" instead of "4" because the number four is considered unlucky in Korea. In Korean, four is pronounced sa (사), which sounds the same as the Sino-Korean word for death (死, also sa). To avoid an uncomfortable association, some buildings label the fourth floor "F" (for "four"), and a few skip the number entirely. It is a gentle superstition, not a strict rule, and many modern buildings simply use 4.

Where the fear of four comes from

The dislike of the number four, sometimes called tetraphobia, is shared across East Asia, including China, Japan and Taiwan. All of these languages use Chinese-derived words in which "four" and "death" sound alike or very close. In Korea, the connection is strong enough that the number four has long been avoided in situations where luck, health or life feels important.

It is similar to how some Western buildings skip the 13th floor. Most people do not truly believe the fourth floor is dangerous, but a building owner has little reason to risk making tenants, patients or guests feel uneasy.

Why "F" instead of just skipping the floor?

Using "F" is a clever middle path. The floor still exists in the logical order (3, F, 5), so visitors are not confused about where they are, but the elevator panel does not display the "death" number. Since English letters are familiar to almost everyone in Korea, "F" for "four" is easy to understand.

Other buildings handle it differently:

Using "F": common in older apartment blocks, office buildings and some hospitals.
Skipping the number: the panel goes from 3 straight to 5, so the "5th" floor is really the fourth.
Just using 4: many newer buildings, subway stations and public facilities use normal numbers.

Where you are most likely to notice it

Hospitals

Hospitals are the classic place to avoid four, for obvious reasons. You may find no fourth floor, or rooms numbered in a way that skips 4.

Apartments and hotels

Some apartment buildings and older hotels use "F" or avoid room numbers ending in 4. Room 404 or 444 can be especially unpopular.

Everyday life

The superstition also shows up quietly elsewhere: people may avoid giving gifts in sets of four, and some avoid phone numbers or car plates full of fours. On the other hand, numbers like 7 (seen as lucky, partly through Western influence) and 3 (a traditionally favorable number in Korea) are popular.

A POPORO CITY resident jokes: "My apartment is on floor F. I tell delivery riders it stands for 'fantastic.'"

Is the superstition fading?

Younger Koreans are generally relaxed about it, and plenty of modern towers use 4 without a second thought. Still, the "F" button remains a familiar sight, and many people feel a small tickle of hesitation around the number. It is better understood as a cultural habit than a serious belief.

Quick tips for visitors

If you are told to go to the fourth floor and see no 4 button, press "F".
If the panel jumps from 3 to 5, the floor called 5 may actually be the fourth level, so check signs in the lobby.
When giving a gift to a Korean host, choose sets of 3 or 5 rather than 4 to be safe.
Don't worry about being "rude" if you mention the number four; it is a light superstition, not a taboo topic.
Writing names in red ink is another small Korean superstition worth knowing.

Want more Korean everyday-life customs? See why Koreans avoid writing names in red ink and why Korean apartment complexes are named like brands.

FAQ

What does "F" mean in a Korean elevator?

It usually means the fourth floor. "F" stands for "four" and is used to avoid showing the number 4, which sounds like the word for death.

Why is 4 unlucky in Korea?

The Korean word for four, sa, sounds the same as the Sino-Korean word for death, so the number feels unlucky, much like 13 in some Western countries.

Do all Korean buildings avoid the fourth floor?

No. Many newer buildings and public places use 4 normally. The "F" label and skipped floors are most common in hospitals, older apartments and some hotels.

Is it rude to give four gifts in Korea?

It is not a serious offense, but some people may find a set of four slightly unlucky. Choosing a different number is an easy, thoughtful choice.