Water flow charts:
This water flow rate table is showing rate of water through copper tubing - pipes .
Volume of flow is at one foot per minute velocity.
| Type L Copper Tube |
| Dia. inches: |
Cubic ft/min: |
Gallons/minute: |
| 1/8" |
0.0002 |
0.002 |
| 1/4" |
0.0005 |
0.004 |
| 3/8" |
0.0010 |
0.008 |
| 1/2" |
0.0016 |
0.012 |
| 3/4" |
0.0034 |
0.025 |
| 1" |
0.0057 |
0.043 |
| 1 1/4" |
0.0087 |
0.065 |
| 1 1/2" |
0.0124 |
0.093 |
| 2" |
0.0209 |
0.161 |
| Type K Copper Tube |
| Dia. inches: |
Cubic ft/min: |
Gallons/minute: |
| 1/8" |
0.0002 |
0.0014 |
| 1/4" |
0.0005 |
0.0039 |
| 3/8" |
0.0009 |
0.0066 |
| 1/2" |
0.0015 |
0.0113 |
| 3/4" |
0.0030 |
0.0267 |
| 1" |
0.0054 |
0.0404 |
| 1 1/4" |
0.0085 |
0.0632 |
| 1 1/2" |
0.0196 |
0.0895 |
| 2" |
0.0209 |
0.1565 |
This water flow rate table shows water flow through pipes .
Volume of flow is at one foot per minute velocity in these pipes.
| Schedule 40 pipe |
| Dia. inches: |
Cubic ft/min: |
Gallons/minute: |
| 1/8" |
0.0004 |
0.003 |
| 1/4" |
0.0007 |
0.005 |
| 3/8" |
0.0013 |
0.010 |
| 1/2" |
0.0021 |
0.016 |
| 3/4" |
0.0037 |
0.028 |
| 1" |
0.0062 |
0.046 |
| 1 1/4" |
0.0104 |
0.078 |
| 1 1/2" |
0.0141 |
0.106 |
| 2" |
0.0233 |
0.174 |
| Schedule 80 pipe |
| Dia. inches: |
Cubic ft/min: |
Gallons/minute: |
| 1/8" |
0.0003 |
0.002 |
| 1/4" |
0.0005 |
0.004 |
| 3/8" |
0.0010 |
0.007 |
| 1/2" |
0.0016 |
0.012 |
| 3/4" |
0.0030 |
0.025 |
| 1" |
0.0050 |
0.037 |
| 1 1/4" |
0.0088 |
0.067 |
| 1 1/2" |
0.0123 |
0.092 |
| 2" |
0.0206 |
0.154 |
please do not rely on these figures as being totally accurate, the above is provided to give a general idea of flow rates
