Volume Flow Units

Volume flow is the volume of liquid or gas flowing through the cross section of the flow per unit time. Thus Q = V / t.

International System of Units (SI)

For the international system of units (SI), substituting the volume values in [m³] into the above formula, and the time in seconds [s], we get that the volume flow unit in SI is 1 m³ / s.
  Here is a list of derivatives:

• 1 m³/s = 60 m³/m
• 1 m³/min = 60 m³/h
• 1 m³/h = 24 m³/d
• 1 m³/d = 365.25 m³/yr
• 1 m³/s = 1000 L/s
• 1 liter per second [L/s] = 60 liters per minute [L/min]
• 1 liter per minute [L/min] = 60 liters per hour [L/h]
• 1 liter per hour [L/h] = 24 liters per day [L/d]
• 1 liter per day [L/d] = 365.25 liters per year [L/yr]

United States and Britain

In view of the fact that in some English-speaking countries the volume is measured in units other than the SI system, we translate them into the SI system.

• 1 inch [in] = 0.0254 m. Then the cubic inch [in³] = 0.000016387064 m³
• 1 ft [ft] = 0.3048 m. Then the cubic foot [ft³] = 0.028316846592 m³
• 1 yard [yd] = 0.9144 m. Then the cubic yard [yd³] = 0.764554857984 m³
• 1 acre = 4840 square yards = 4046.8564224 m²
• Acre-ft is the volume of water needed to cover a height of one foot in one acre.
    Then 1 acre-foot [af] = 1233.48183754752 m³
• 1 barrel [bbl] (American, oil) = 0.158988 m³
• 1 American gallon [gal] = 0.003785411784 m³
• 1 Imperial (British) gallon [gal] = 0.00454609188 m³
• We accept: 1 year = 365.25 days

And then we calculate:

• 1 acre-foot per second [af/s] = 1233.48183754752 meter³ per second [m³/s]
• 1 acre-foot per minute [af/min] = 20.55803062579 meter³ per second [m³/s]
• 1 acre-foot per hour [af/h] = 0.34263384376 meter³ per second [m³/s]
• 1 acre-foot per day [af/d] = 51.39507656448 meter³ per hour [m³/h]
• 1 acre-foot per year [af/yr] = 0.14071205083 meter³ per hour [m³/h]
• 1 barrel (oil) per second [bbl/s] = 0.158988 meter³ per second [m³/s]
• 1 barrel (oil) per minute [bbl/min] = 9.53928 meter³ per hour [m³/h]
• 1 barrel (oil) per hour [bbl/h] = 3.815712 meter³ per day [m³/d]
• 1 barrel (oil) per day [bbl/d] = 58.070367 meter³ per year [m³/yr]
• 1 barrel (oil) per year [bbl/yr] = 158.988 liters per year [L/yr]
• 1 gallon (US) per second [gps] = 3.785411784 liters per second [L/s]
• 1 gallon (US) per minute [gpm] = 0.0630901964 liters per second [L/s]
• 1 gallon (US) per hour [gph] = 3.785411784 liters per hour [L/h]
• 1 gallon (US) per day [gpd] = 3.785411784 liters per day [L/d]
• 1 gallon (US) per year [gpy] = 3.785411784 liters per year [L/yr]
• 1 ft³ per second [ft³/s] = 1728 [in³/s] = 28.316846592 liters per second [L/s]
• 1 ft³ per minute [ft³/min] = 28.8 [in³/s] = 0.4719474432 liters per second [L/s]
• 1 ft³ per hour [ft³/h] = 0.46 [in³/s] = 28.316846592 liters per hour [L/h]
• 1 ft³ per day [ft³/d] = 0.02 [in³/s] = 1.179868608 liters per hour [L/h]
• 1 ft³ per year [ft³/yr] = 1728 [in³/yr] = 28.316846592 liters per year [L/yr]
• 1 inch³ per second [in³/s] = 0.0005787037 [ft³/s] = 58.9934304 liters per hour [L/h]
• 1 inch³ per minute [in³/min] = 0.0005787037 [ft³/min] = 0.98322384 liters per hour [L/h]
• 1 inch³ per hour [in³/h] = 0.0005787037 [ft³/h] = 0.393289536 liters per day [L/d]
• 1 inch³ per day [in³/d] = 0.0005787037 [ft³/d] = 5.985375126 liters per year [L/yr]
• 1 inch³ per year [in³/yr] = 0.0005787037 [ft³/yr] = 0.016387064 liters per year [L/yr]

Britain

• 1 gallon (UK) per second [gps] = 4.54609188 liters per second [L/s]
• 1 gallon (UK) per minute [gpm] = 0.075768198 liters per second [L/s]
• 1 gallon (UK) per hour [gph] = 4.54609188 liters per hour [L/h]
• 1 gallon (UK) per day [gpd] = 4.54609188 liters per day [L/d]
• 1 gallon (UK) per year [gpy] = 4.54609188 liters per year [L/yr]