Question 838433
I'm building a kiln. How many 4"x8" bricks are needed to build the pit, size 8' in diameter by 4' high?
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You can calculate the area.
For the bottom, it's {{pi*r^2 = 16pi}}} sq ft
= {{{144*16*pi}}} sq inches
Each brick is 32 sq inches
{{{144*16*pi/32}}} =~ 226.2 bricks on the bottom
but you have to take into account that they can't all fit into a circular area.
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For the sides:
{{{Area = pi*d*h = pi*96*48 = 4608pi}}} sq inches
You only gave 2 dimensions for the bricks.  If the 4 by 8 faces from the sides, then you need 4608*pi/32 bricks
=~ 452.4 bricks
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If this is for actual construction, get a few extra.