Volumetric Flux
gpm/ft²toin/min
Convert US gallons per minute per square foot (gpm/ft²) to inches per minute (volumetric flux) (in/min).
Factor1 gpm/ft² = 1.604126 in/min
Converter
gpm/ft²
Accepts numbers or expressions, e.g. 150 + 14.7
Result
in/min
Rendered to 6 significant figures.
Formula
Formula
in/min = gpm/ft² × 1.604126
Multiply any value in US gallons per minute per square foot by 1.604126 to obtain the value in inches per minute (volumetric flux).
Worked example
Convert 10 gpm/ft² to in/min.
- 01Start with 10 gpm/ft².
- 02Multiply by the conversion factor: 10 × 1.604126 = 16.0413 in/min.
Result10 gpm/ft² = 16.0413 in/min
Conversion table
| gpm/ft² | in/min |
|---|---|
| 1 | 1.6041 |
| 2 | 3.2083 |
| 5 | 8.0206 |
| 10 | 16.041 |
| 20 | 32.083 |
| 50 | 80.206 |
| 100 | 160.41 |
| 200 | 320.83 |
| 500 | 802.06 |
| 1000 | 1604.1 |
Reference values rounded to 5 significant figures for display.
FAQ
What is the conversion factor from gpm/ft² to in/min?
1 gpm/ft² equals 1.604126 in/min. To convert, multiply the value in US gallons per minute per square foot by 1.604126.
How do I convert 1 gpm/ft² to in/min?
1 gpm/ft² = 1.60413 in/min. For any value, multiply by 1.604126.
How do I convert in/min back to gpm/ft²?
Divide by the same factor — or equivalently, multiply by 0.6233924. So 1 in/min = 0.623392 gpm/ft².
When would I need to convert US gallon per minute per square foot to inch per minute (volumetric flux)?
Volumetric-flux conversions between gpm/ft² and in/min are routine in membrane filtration (RO, UF, MF, NF permeate flux), hydraulic loading specification, water-treatment design, hydrometallurgy and packed-bed column loading, and environmental engineering. LMH (L/m²/h) and gfd (gal/ft²/day) dominate membrane datasheets; m³/m²/h and m³/m²/day cover SI engineering ladders; m/day and cm/s appear as superficial velocity in hydromet and packed-bed work. Volumetric flux is the same physical quantity as superficial velocity (m³/m²/s ≡ m/s) but is kept distinct from the velocity and flow categories because the engineering intent is volumetric throughput per unit area, not bulk motion or total throughput.
Is the conversion exact?
The factor shown is precise to at least 7 significant figures. For most process-engineering work this is far better than instrument accuracy. For metrology or trade applications, refer to the relevant national standard (NIST, BIPM, ISO 80000).
Related conversions
- in/min → gpm/ft²inch per minute (volumetric flux) → US gallon per minute per square foot
- m/s → gpm/ft²metre per second (volumetric flux) → US gallon per minute per square foot
- gpm/ft² → m/sUS gallon per minute per square foot → metre per second (volumetric flux)
- m³/m²/h → gpm/ft²cubic metre per square metre per hour → US gallon per minute per square foot
- gpm/ft² → m³/m²/hUS gallon per minute per square foot → cubic metre per square metre per hour
- m³/m²/day → gpm/ft²cubic metre per square metre per day → US gallon per minute per square foot