Velocity Pressure Head Calculator

Calculate dynamic pressure and velocity head for water and air flows using pitot tube measurements. Supports metric and imperial units for converting between flow velocity and pressure head.

Calculator

Inputs

Water Flow Velocity (ft/sec)

Results

Velocity Head (ft H2O)-- ft H2O

Velocity Head (in H2O)-- in H2O

Calculator

Inputs

Air Flow Velocity (ft/min)

Air Temperature (°F)

Results

Velocity Head (in H2O)-- in H2O

Velocity Head (ft H2O)-- ft H2O

Water Flow Velocity (ft/sec)	Velocity Head (ft H2O)
0.5	0.004
1	0.016
1.5	0.035
2	0.062
2.5	0.097
3	0.14
3.5	0.19
4	0.248
4.5	0.314
5	0.389
5.5	0.47
6	0.56
6.5	0.657
7	0.762
7.5	0.875
8	0.995
8.5	1.123
9	1.259
9.5	1.403
10	1.555
11	1.881
12	2.239
13	2.627
14	3.047
15	3.498
16	3.98
17	4.493
18	5.037
19	5.613
20	6.219
21	6.856
22	7.525

Air Flow Velocity (ft/sec)	Velocity Head (ft H2O)
5	0.00047
10	0.0019
15	0.0042
20	0.0075
25	0.012
30	0.017
35	0.023
40	0.03
45	0.038
50	0.047
55	0.057
60	0.067
65	0.079
70	0.092
75	0.11
80	0.12
85	0.14
90	0.15
95	0.17
100	0.19