How do you calculate the space an air conditioner cools?

Question

i'm needing to buy a window a/c for my tweo beroom apartment with ten foot ceilings and need to know the size.

Answer 1

There are various formulas which you can find online.  It's not only the cubic feet of the room, but whether the room has outside walls and if so how many, whether there is insulation, whether the spaces above and below the room are heated and cooled, and what direction the outside walls face.  

Also, make sure your wiring can handle a window air conditioner without blowing a breaker.  They suck lots of juice.

Answer 2

Measure width times length.

This is the square footage.

http://www.fedders.com/BTUsizing.htm

Answer 3

To cool this area Look for this size air conditioner

100 to 150 square feet 5,000 BTUs

150 to 250 square feet 6,000 BTUs

250 to 300 square feet 7,000 BTUs

300 to 350 square feet 8,000 BTUs

350 to 400 square feet 9,000 BTUs

400 to 450 square feet 10,000 BTUs

450 to 550 square feet 12,000 BTUs

550 to 700 square feet 14,000 BTUs

700 to 1,000 square feet 18,000 BTUs

1,000 to 1 400 square feet 24,000 BTUs

Answer 4

400 sq ft of floor space per ton is the general rule.