Pipe Size CalculatorAcres Drained: Grade %: CalculatePipe Size vs. Drainage Coefficient1/81/43/81/23/41Q(c.f.s)Single Wall PipeVel.(ft/sec)Calculated SizeCommercial SizeDual Wall PipeVel.(ft/sec)Calculated SizeCommercial Size Drainage Potential CalculatorPipe Diameter: Grade%: CalculateAcres Drained vs. Drainage Coefficient1/81/43/81/23/41Dual WallSingle Wallc.f.sg.p.macres in /24hrsVelocity (ft./sec.)Dual WallSingle Wall