m³/h to LPM Calculator

Cubic Meters Per Hour to Liters Per Minute

m³/h to LPM converts cubic meters per hour into liters per minute. Both are metric volumetric flow-rate units. m³/h is common for larger pump, water-treatment, irrigation, HVAC, and industrial process systems, while LPM is common for flow meters, dosing systems, field readings, and smaller metric equipment.

Key Engineering Entities

This page uses entities such as m³/h, LPM, cubic meters per hour, liters per minute, SI, ISO 80000, ISO 9906, centrifugal pumps, flow meters, SCADA, PLC, water treatment, irrigation, HVAC hydronic loops, Grundfos, KSB, Wilo, Ebara, Xylem, and Sulzer.

Convert m³/h to LPM Instantly

The m3/h to LPM calculator above requests a flow value in cubic meters per hour and returns the equivalent liters per minute. It helps convert pump curve values, plant flow schedules, irrigation mainline flow, and industrial process flow into a smaller metric unit for field instruments and control settings.

Default example: 6 m³/h = 100.00 LPM.

Direct Metric Volume Flow Conversion

To convert m3/h to LPM, multiply the m³/h value by 16.6666667. This factor comes from converting cubic meters to liters and hours to minutes: one cubic meter is 1000 liters, and one hour is 60 minutes.

This conversion does not change pump head, system pressure, pipe friction, fluid density, viscosity, or pressure drop. It only changes the flow-rate unit.

Same Flow, Smaller Metric Unit

Cubic meters per hour to liters per minute changes a larger hour-based metric flow into a minute-based metric flow. It is useful when plant, pump, or process data in m³/h must be matched with flow meters, commissioning records, dosing systems, or PLC values in LPM.

Where the Units Appear

m³/h appears on ISO 9906 pump curves, water-treatment plant flow sheets, municipal water systems, cooling-water loops, and industrial process documents. LPM appears on smaller flow meters, laboratory equipment, dosing skids, field instruments, and commissioning tools.

Worked Calculation

For a flow rate of 12 m³/h, calculate LPM as 12 x 16.6666667 = 200 LPM. This is the same flow written in the smaller metric unit used by many field instruments and commissioning notes.

12 m³/h = 200 LPM.

Exact Practical Value

1 m³/h = 16.6666667 LPM. One cubic meter is 1000 liters, so 1 m³/h equals 1000 liters per hour. Divide by 60 minutes to get 16.6666667 liters per minute.

Reverse Value

1 LPM = 0.06 m³/h. Use the reverse value when an LPM field reading must be written in m³/h for a pump curve or plant schedule.

Formula Derivation

Start with m³/h, multiply by 1000 liters per cubic meter, then divide by 60 minutes per hour. This gives m³/h x 1000 / 60 = m³/h x 16.6666667.

Quick Metric Flow Chart

The chart below uses LPM = m³/h x 16.6666667. It is useful for pump curves, water flow, irrigation systems, HVAC hydronic loops, water-treatment systems, and industrial process flow checks.

Example for a Pump Curve

A pump curve shows 18 m³/h. To convert it to LPM, multiply 18 by 16.6666667. The result is 300 LPM. This lets you compare a pump curve from Grundfos, KSB, Wilo, Ebara, Xylem, or Sulzer with a field flow meter reading in LPM.

18 m³/h x 16.6666667 = 300 LPM.

Flow Rate in Metric Engineering

m3/h to flow rate LPM converts a larger plant or pump flow value into a smaller minute-based unit. LPM is convenient for field instruments, commissioning tests, dosing systems, control valves, and PLC tags, while m³/h is common in process schedules and pump curves.

For engineering design, combine the unit conversion with pipe size, flow velocity, pressure drop, pump head, and system curve checks.

Metric Unit Expansion

m3/h to liters per minute expands cubic meters into liters and converts an hourly rate into a minute rate. The result is useful when large plant flow values must be checked against smaller local instruments, rotameters, dosing pumps, or commissioning meters.

Use LPM when the operation depends on minute-by-minute flow adjustment or field readings.

Water Treatment and Distribution

m3/h to LPM for water flow is used in water-treatment plants, filtration systems, booster stations, municipal distribution, cooling-water loops, and process water lines. Common entities include electromagnetic flow meters, ultrasonic flow meters, Endress+Hauser, Siemens, Krohne, Yokogawa, SCADA, and PLC tags.

30 m³/h water flow = 500 LPM.

Pump Curves and Duty Points

m3/h to LPM for pumps helps convert pump curve flow into a field-friendly metric value. Pump entities include centrifugal pumps, booster pumps, submersible pumps, ISO 9906, pump duty point, system curve, total dynamic head, NPSH, Grundfos, KSB, Wilo, Ebara, Xylem, and Sulzer.

After converting the flow, verify pump head, efficiency, NPSH margin, pipe losses, valve pressure drop, and the operating point.

Irrigation Flow and Pump Stations

m3/h to LPM for irrigation is useful when mainline pump capacity, filtration flow, or zone demand is listed in m³/h but sprinkler, drip, or emitter calculations use LPM. Irrigation entities include Rain Bird, Hunter, Netafim, Toro, drip irrigation, sprinkler zones, mainline flow, filtration, pressure regulators, and pump stations.

Use the conversion for unit consistency, then verify pressure, friction loss, emitter count, valve capacity, and pump duty point.

Process Flow and Plant Documentation

m3/h to LPM for industrial flow supports process water, cooling circuits, chemical transfer, washdown systems, boiler feed, filtration skids, and utility water. Industrial entities include P&ID, process flow diagram, PLC, SCADA, magnetic flow meter, ultrasonic flow meter, control valve, pump skid, and ISO documentation.

For engineering-critical work, check fluid properties, pressure class, pipe velocity, Reynolds number, pressure drop, and manufacturer limits.

Reverse Conversion Example

A 200 LPM field reading equals 200 x 0.06 = 12 m³/h. Use this when a field reading must be compared with a plant schedule or pump curve in m³/h.

Use m³/h, LPM, L/s, and GPM Consistently

Flow rate conversion keeps pump curves, flow meters, PLC tags, SCADA screens, irrigation schedules, and industrial process documents in the same unit system. m³/h and LPM are both metric volumetric flow units, while GPM, CFM, and L/s may appear in mixed-system projects.

For engineering-critical applications, verify the converted value against manufacturer data, system curves, pressure drop calculations, and project specifications.