one tatami mat is equivalent to 3.3 square meters.
A tatami mat is a unit of measure used to indicate the size of a room or piece of land.
It is equal to one-thirtieth of a square meter, or one-thirtieth of a tatami mat.
The size of a tatami mat varies depending on the country or region, but in Japan and Taiwan area of the Republic of China, one tatami mat is typically equal to 3.3 square meters.
In the People’s Republic of China, one tatami mat is typically equal to 3.3058 square meters.