▸ processconvert
Volumetric Flux

LMHtoin/min

Convert litres per square metre per hour (LMH) to inches per minute (volumetric flux) (in/min).

Factor1 LMH = 0.000656168 in/min

Converter

LMH

Accepts numbers or expressions, e.g. 150 + 14.7

Result
0.656168in/min

Rendered to 6 significant figures.

Formula

Formula
in/min = LMH × 0.000656168

Multiply any value in litres per square metre per hour by 0.000656168 to obtain the value in inches per minute (volumetric flux).

Worked example

Convert 1000 LMH to in/min.

  1. 01Start with 1000 LMH.
  2. 02Multiply by the conversion factor: 1000 × 0.000656168 = 0.656168 in/min.
Result1000 LMH = 0.656168 in/min

Conversion table

LMHin/min
10.00065617
20.0013123
50.0032808
100.0065617
200.013123
500.032808
1000.065617
2000.13123
5000.32808
10000.65617

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from LMH to in/min?
1 LMH equals 0.000656168 in/min. To convert, multiply the value in litres per square metre per hour by 0.000656168.
How do I convert 1 LMH to in/min?
1 LMH = 0.000656168 in/min. For any value, multiply by 0.000656168.
How do I convert in/min back to LMH?
Divide by the same factor — or equivalently, multiply by 1524. So 1 in/min = 1524 LMH.
When would I need to convert litre per square metre per hour to inch per minute (volumetric flux)?
Volumetric-flux conversions between LMH 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