Volumetric flow rate.
Liter per Seconds to Cubic Millimeter per Seconds Converter — L/s to mm3/s
Convert Liter per Seconds (L/s) to Cubic Millimeter per Seconds (mm3/s) using the exact conversion factor (1 liter per seconds = 1,000,000 cubic millimeter per seconds). See the formula, worked examples, conversion table, and common uses.
Liter per Seconds to Cubic Millimeter per Seconds converter
Converter
Flow Rate Converter
Convert volumetric flow rates across metric, US, imperial, industrial, and scientific units.
Context values
Some unit families need one extra value for a physically accurate result.
Volumetric flow rate.
Result = input x 0.001 / 1e-9.
Flow rate uses cubic meters per second as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Liter per Seconds to Cubic Millimeter per Seconds
Liter per Seconds and Cubic Millimeter per Seconds both measure volumetric flow rate — how much volume passes a point over time — used to size pipes and pumps, monitor river or stream discharge, control industrial processes, and set medical infusion rates. Liter per Seconds is most often used for municipal water supply and treatment plant flow rates.
Formula
cubic millimeter per seconds = liter per seconds × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 liter per seconds equals 0.001 base units, and 1 cubic millimeter per seconds equals 1e-9 base units, so dividing one by the other gives the direct liter per seconds-to-cubic millimeter per seconds factor of 1000000.
Simple example
1 L/s × 1000000 = 1,000,000 mm3/s
1 liter per seconds = 1,000,000 cubic millimeter per seconds.
Real-world example
60 L/s × 1000000 = 60,000,000 mm3/s
60 liter per seconds = 60,000,000 cubic millimeter per seconds.
Conversion table
| Liter per Seconds (L/s) | Cubic Millimeter per Seconds (mm3/s) |
|---|---|
| 0.1 L/s | 100,000 mm3/s |
| 1 L/s | 1,000,000 mm3/s |
| 10 L/s | 10,000,000 mm3/s |
| 60 L/s | 60,000,000 mm3/s |
| 100 L/s | 100,000,000 mm3/s |
| 1,000 L/s | 1,000,000,000 mm3/s |
Reverse conversion: Cubic Millimeter per Seconds to Liter per Seconds
1 mm3/s × 0.000001 = 0.000001 L/s
1 cubic millimeter per seconds = 0.000001 liter per seconds.
liter per seconds = cubic millimeter per seconds × 0.000001
For a page dedicated to this direction, see Cubic Millimeter per Seconds to Liter per Seconds.
Understanding the Liter per Seconds
Liter per Seconds (L/s) measures volumetric flow rate. One liter of volume passing a point every second — used for larger flows than liter-per-minute conveniently describes. It is classified as a metric derived flow-rate unit.
Where it's used: Common in municipal water-utility and industrial flow specifications internationally
L/s vs. L/min. Both measure the same quantity at different time scales; 1 L/s equals 60 L/min. L/s is typically used for larger, continuous industrial or utility flows, while L/min suits smaller household-scale flows.
Uses of the Liter per Seconds today
- Municipal water supply and treatment plant flow rates
- Industrial process flow specifications
- Stream and river discharge measurement at moderate scales
Understanding the Cubic Millimeter per Seconds (mm3/s)
Volumetric flow rate.
Liter per Seconds — sources
- BIPM SI Brochure — Litre and second as accepted units used together to express flow rate.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many cubic millimeter per seconds are in 1 liter per seconds?
1 liter per seconds equals 1,000,000 cubic millimeter per seconds, using the exact defined conversion factor rather than an estimate.
How do I convert liter per seconds to cubic millimeter per seconds?
Multiply the liter per seconds value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert cubic millimeter per seconds back to liter per seconds?
Use the reverse factor: 1 cubic millimeter per seconds equals 0.000001 liter per seconds. You can also use the swap control in the converter above to flip the direction instantly.
What is a liter per seconds?
Liter per Seconds (L/s) measures volumetric flow rate. One liter of volume passing a point every second — used for larger flows than liter-per-minute conveniently describes. It is classified as a metric derived flow-rate unit.
What is a cubic millimeter per seconds?
Cubic Millimeter per Seconds (mm3/s) is a unit of flow rate.
Is the liter per seconds to cubic millimeter per seconds conversion exact?
Yes. Both liter per seconds and cubic millimeter per seconds are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.
What is the difference between l/s vs. l/min?
Both measure the same quantity at different time scales; 1 L/s equals 60 L/min. L/s is typically used for larger, continuous industrial or utility flows, while L/min suits smaller household-scale flows.
Where is the liter per seconds still used today?
Common in municipal water-utility and industrial flow specifications internationally