System Pressure Calculator
Accurately estimate the total pressure drop in your ductwork system by accounting for friction and fitting losses.
System Pressure Calculator
Select Spiral diameter, enter the volume and units, then the quantities for fittings.
Volume Unit Converter
Enter the volume and unit above
m³/s
0.100
L/s
100.0
m³/hr
360
cfm
212
Pipe Diameter Calculator
Velocity wanted
m/s
Duct diameter you need
113
mm Ø
Diameter Pipe used
mm
Velocity in specified size pipe
1.3
m/s
Equivalent Size Calculator
Enter Duct Dimensions
Equivalent Size
451
Dia
Enter Diameter
Equivalent Size
177
Square
Enter Rectangular Sizes
Equivalent Size
283
Square
System Pressure Calculator
Duct Diameter
mm
Vel in m/s
6.37
Quantity
Resistance
Notes
Lengths of Spiral in m
m
Pa/m
90° Bends
Pa each
45° Bends
Pa each
Fully Extended Flex in m
m
Pa/m
90° Flexible Bend
Pa each
Reducer (depends on amount)
Pa each
Tee (supply from branch)
Pa each
Y Piece
Pa each
Filter Cassette (Clean)
Pa each
Weather Louvre**
Pa each
Lengths of Spiral in m (Pa/m)
Pa/m
Pa/m (flex)
TOTAL RESISTANCE (in Pascals)
0.00