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Flow Pressure       Convert To:                
  3" 5" 7" 10" 12" 15" 20" 25" 28" 30" 35" 40" 45"
3" 1.000 1.291 1.528 1.826 2.000 2.236 2.582 2.887 3.055 3.162 3.416 3.651 3.873
5" 0.775 1.000 1.183 1.414 1.549 1.732 2.000 2.236 2.366 2.449 2.646 2.828 3.000
7" 0.655 0.845 1.000 1.195 1.309 1.464 1.690 1.890 2.000 2.070 2.236 2.390 2.535
10" 0.548 0.707 0.837 1.000 1.095 1.225 1.414 1.581 1.673 1.732 1.871 2.000 2.121
12" 0.500 0.645 0.764 0.913 1.000 1.118 1.291 1.443 1.528 1.581 1.708 1.826 1.936
15" 0.447 0.577 0.683 0.816 0.894 1.000 1.155 1.291 1.366 1.414 1.528 1.633 1.732
20" 0.387 0.500 0.592 0.707 0.775 0.866 1.000 1.118 1.183 1.225 1.323 1.414 1.500
25" 0.346 0.447 0.529 0.632 0.693 0.775 0.894 1.000 1.058 1.095 1.183 1.265 1.342
28" 0.327 0.423 0.500 0.598 0.655 0.732 0.845 0.945 1.000 1.035 1.118 1.195 1.268
30" 0.316 0.408 0.483 0.577 0.632 0.707 0.816 0.913 0.966 1.000 1.080 1.155 1.225
35" 0.293 0.378 0.447 0.535 0.586 0.655 0.756 0.845 0.894 0.926 1.000 1.069 1.134
40" 0.274 0.354 0.418 0.500 0.548 0.612 0.707 0.791 0.837 0.866 0.935 1.000 1.061
45" 0.258 0.333 0.394 0.471 0.516 0.577 0.667 0.745 0.789 0.816 0.882 0.943 1.000
Example: For flow taken at 25" (row heading) and converted to 28" (column heading). Multiply flow by 1.058
Correctedand Updated 10/30/03- thanks to Nathan Wood!
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