### Basic Pneumatic Formulas | Flodraulic Group

Area (sq ins) = π x r² where π (pi) = 3.1416 and r = radius in inches squared. Area (sq ins) = π x d² 4 where π (pi) = 3.1416 and d = diameter in inches. Circumference (ins) = 2 x π x r where π (pi) = 3.1416 and r is radius in inches. Circumference (ins) = π x d where π (pi) = 3.1416 and d = diameter in inches.

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