Exact unit definitions — signed volume flow
Exact Volumetric Flow Rate Converter
Convert the same volumetric flow quantity between SI,U.S. liquid-gallon and international-foot units without changing fluid state or reference conditions.
Converted values
Single SI base
valueoutput=Qm³/s/factoroutput
Exact factors to m³/s are:m³/s=1;m³/h=1/3600;L/s=0.001;L/min=1/60000;US gal/min=0.0000630901964;ft³/min=0.0004719474432.
Traceable definitions
NIST SP811 AppendixB identifies exact conversion factors and defines the international foot as exactly0.3048m. NIST Handbook44 AppendixC defines the U.S. liquid gallon as exactly231in³. Together with1in=0.0254m exactly,this gives1US gal=0.003785411784m³ exactly. One litre is1dm³,so1L=0.001m³ exactly;1min=60s and1h=3600s.
State and density are unchanged
For liquids and gases,the numerical conversion assumes the same volumetric-flow quantity at the same stated conditions. Mass flow requires density on a compatible basis. Standard/normal gas flow requires the exact reference pressure,temperature,humidity/compressibility convention and a gas-state calculation;none is inferred here.
Nikolai Shelkovenko
Nikolai Shelkovenko is a vibration analysis engineer and the founder and CEO of Vibromera. For more than 15 years he has balanced rotating equipment in the field rather than on a test bench: mulchers, industrial fans, crushers, centrifuges, shafts and spindles. That work is what the Balanset instruments grew out of — they were designed as a tool a specialist can carry to the machine and use alone, on site, not as laboratory equipment. Vibromera was founded in 2017 and has been based in Porto, Portugal, since 2023. Development, assembly and support of the Balanset line all happen here. The flagship instrument is the Balanset-1A, a portable analyser for single- and two-plane balancing and for vibration diagnostics. Nikolai is personally involved in customer support, in working through difficult balancing cases and in the development of the software. He works with customers worldwide, in any language.
