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Volumetric Flux

m³/m²/htoLMH

Convert cubic metres per square metre per hour (m³/m²/h) to litres per square metre per hour (LMH).

Factor1 m³/m²/h = 1000 LMH

Converter

m³/m²/h

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

Result
1000LMH

Rendered to 6 significant figures.

Formula

Formula
LMH = m³/m²/h × 1000

Multiply any value in cubic metres per square metre per hour by 1000 to obtain the value in litres per square metre per hour.

Worked example

Convert 1 m³/m²/h to LMH.

  1. 01Start with 1 m³/m²/h.
  2. 02Multiply by the conversion factor: 1 × 1000 = 1000 LMH.
Result1 m³/m²/h = 1000 LMH

Conversion table

m³/m²/hLMH
11000
22000
55000
1010000
2020000
5050000
1001.0000e+5
2002.0000e+5
5005.0000e+5
10001.0000e+6

Reference values rounded to 5 significant figures for display.

FAQ

What is the conversion factor from m³/m²/h to LMH?
1 m³/m²/h equals 1000 LMH. To convert, multiply the value in cubic metres per square metre per hour by 1000.
How do I convert 1 m³/m²/h to LMH?
1 m³/m²/h = 1000 LMH. For any value, multiply by 1000.
How do I convert LMH back to m³/m²/h?
Divide by the same factor — or equivalently, multiply by 0.001. So 1 LMH = 0.001 m³/m²/h.
When would I need to convert cubic metre per square metre per hour to litre per square metre per hour?
Volumetric-flux conversions between m³/m²/h and LMH 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).

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