Verification: factors follow standard unit definitions; round for display only.

L/s to L/min

Convert L/s to L/min when a pump test, process datasheet, or hydraulic model reports liters per second but fixture schedules, irrigation catalogs, or shower-flow labels quote liters per minute.

Liters per second (L/s) and liters per minute (L/min, LPM) measure the same volumetric flow rate with identical volume units (liters) and only the time denominator changing from one second to one minute. Because 1 min = 60 s, the conversion is exact:

This site anchors all flow units to cubic meters per second in the shared catalog. From those definitions:

L/min = L/s × 59.9999  ·  catalog ratio 0.001 ÷ 0.0000166667 m³/s per unit

The live converter applies the full floating-point ratio. 59.9999 equals 60 at catalog precision—one liter each second delivers sixty liters over a full minute.

Step-by-step conversion (worked example — irrigation zone)

A drip manifold header is balanced at 0.42 L/s. Convert to L/min for a manufacturer emitter chart rated in L/min:

1. Write the formula: L/min = L/s × 59.9999
2. Multiply: 0.42 × 59.99988000024 = 25.1999 L/min
3. Compare to catalog: 25.2 L/min across the zone matches 0.42 L/s continuous duty

Second worked example (shower / fixture band)

A flow test records 0.15 L/s at a fixture:

1. 0.15 × 59.99988000024 = 8.99998 L/min
2. Many water-efficiency labels cite 9–12 L/min for showers—9 L/min equals 0.15 L/s at this factor.

Third worked example (2.5 L/s process line)

A stainless process line operates at 2.5 L/s during CIP:

1. 2.5 × 59.99988000024 = 150 L/min

Batch records often average L/min for operator readability while PLC trending stores L/s— convert at 59.9999 before comparing alarm setpoints.

Quick mental estimate (no calculator)

Multiply L/s by 60 to get L/min. Example: 0.5 L/s → 30 L/min. Reverse: divide L/min by 60. For small fixture flows, remember 0.1 L/s = 6 L/min and 0.2 L/s = 12 L/min.

L/s to L/min conversion chart (catalog exact)

Where L/s → L/min comes up

• Irrigation: Hydraulic models and SCADA trends may log lateral demand in L/s while emitter and filter catalogs publish L/min per zone—multiply by 60 at the catalog factor before selecting cartridge size.
• Process piping: Instrument datasheets for mag meters and Coriolis devices often default to L/s; operator HMI panels and batch records frequently relabel the same loop in L/min.
• Fixtures & plumbing: WaterSense and EU label programs quote shower and tap limits in L/min; bucket tests and timed-fill field checks yield L/s—convert before comparing to the printed rating.
• Pump & valve sizing: Cv curves and pressure-drop spreadsheets may mix units across revisions; align to L/min or L/s consistently before summing branch flows.

L/min to L/s

Convert L/min to L/s when a fixture label, irrigation chart, or pump curve lists liters per minute but your PLC trend, hydraulic solver, or mag meter export stores liters per second.

Divide by 59.9999 (or multiply by 0.0166667). Both directions share the same minute-to-second relationship.

L/s = L/min ÷ 59.9999  ·  equivalently   L/s = L/min × 0.0166667

Step-by-step conversion (worked example)

A shower head is labeled 9.5 L/min. Convert to L/s for a building model node:

1. Divide: 9.5 ÷ 59.99988000024 = 0.158334 L/s
2. Sanity check: about 0.158 L/s—typical for efficiency-rated fixtures

Second worked example (120 L/min booster)

A catalog pump delivers 120 L/min at duty point:

1. 120 ÷ 59.99988000024 = 2 L/s

Quick mental estimate (reverse)

Divide L/min by 60. Example: 30 L/min → 0.5 L/s. For fixture checks, 6 L/min = 0.1 L/s and 12 L/min = 0.2 L/s.

Quick reference (L/min → L/s)

Reverse conversion is essential when importing manufacturer L/min curves into simulation tools that integrate demand in L/s time steps.

Second vs minute flow bases, common mistakes, and related tools

The L/s–L/min factor is exactly 60 from the clock definition. Keep volumetric flow distinct from pressure, and verify round-trips before setting PLC alarm limits.

L/s vs L/min at a glance

Fixture ratings vs instantaneous tests

Labels in L/min describe sustained flow over a test protocol; a one-second bucket test yields L/s. Convert with ×60 before comparing to the printed L/min rating, and run the test long enough to exceed the manufacturer's stabilization time.

Common mistakes to avoid

• Forgetting the ×60 when only the time unit changes — volume unit stays liter; only multiply or divide by 60, not by 1,000.
• Confusing L/s with m³/s — cubic meters per second is 1,000× larger than L/s for the same numeric value. Use m³/s to L/s first when sources mix those labels.
• Mixing L/min with L/h — hourly rates need ÷60 again. Confirm the denominator on every datasheet column.
• Equating pressure (bar) with flow (L/min) — throttle setting affects flow; conversion does not infer pressure drop across the valve.
• Double rounding on multi-fixture sums — convert each branch at full precision, sum, then round the header total for the schedule cover sheet.

Exactness and round-trip verification

Converting 1 L/s → L/min → L/s should recover 1 within floating-point limits. Anchor pairs: 1 L/s = 59.9999 L/min; 0.1 L/s = 5.99999 L/min; 9 L/min = 0.15 L/s.

Related flow converters

For the inverse of this page, open L/min to L/s. Nearby workflows: m³/s to L/s, m³/s to L/min, US GPM to L/min, and L/min to US GPM.