Use the conversion formula.

F = (9/5) C + 32

F = (9/5)(18) + 32

F = 32.4 + 32

F =64.4

Therefore 18 degrees Centigrade is the same as 64.4 degrees Farenheit.

F = (9/5) C + 32

F = (9/5)(18) + 32

F = 32.4 + 32

F =64.4

Therefore 18 degrees Centigrade is the same as 64.4 degrees Farenheit.