There is no information on the size of kitchens averaged across the world.
15 by 13 approximate.
95 square feet.
A simple rectangular room 20 feet by 18 feet has 360 square feet.
324 square feet. Length x width = square feet.
324 square feet.
130 square feet.
357628574 square feet
The area of the three room's sums equals 292ft2
An average sized room such as a bedroom could be ten feet square or eight feet square. Larger rooms will be longer than they are wide.
There is no information on an internationally average size.
Industry wide surveys show that the average size of a great room is about 550 square feet. This is variable from about 400 square foot to about 750 square.
95 square feet.
About 100 square feet is the averge room size for a heater to be used.
400 square feet.
If it's a square room then the room size is 14 feet by 14 feet
189 square feet would be 13.5 feet wide by 14 feet long. Height of a room is based on average height.
144 square feet (12 X12) is normal for all except the master bedroom. Master bed room is more like 250 - 300 square feet.
The average size of a utility room is around 25 square feet. It provides enough room to store a few belongings but not much more.