Convert Liters per Second to Cubic Meters per Second
1 liter per second (L/s) equals 0.001 cubic meters per second (m³/s).
1 L/s = 0.001 m³/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk liter per second to cubic meter per second converter to paste a column from Excel.
How to Convert Liter per Second to Cubic Meter per Second
- 1 L/s = 0.001 m³/s
- 1 m³/s = 1000 L/s
- Example: convert 15 L/s to m³/s: 15 L/s = 15 × 0.001 m³/s = 0.015 m³/s
Formula
m³/s = L/s ÷ 1000
Derivation from SI units:
- 1 L/s = 10⁻³ m³ ÷ 1 s
- 1 m³/s = 1 m³ ÷ 1 s
Both units are defined exactly, so the factor is exact. Liter per Second definition: liter per second; Cubic Meter per Second definition: cubic meter per second.
Worked examples
- A reading of 5 L/s converts to 0.005 m³/s.
5 L/s × 0.001 = 0.005 m³/s - A value of 50 L/s is 0.05 m³/s.
50 L/s × 0.001 = 0.05 m³/s
Liter per Second to Cubic Meter per Second conversion table
| Liters per Second (L/s) | Cubic Meters per Second (m³/s) |
|---|---|
| 0.1 L/s | 0.0001 m³/s |
| 0.5 L/s | 0.0005 m³/s |
| 1 L/s | 0.001 m³/s |
| 2 L/s | 0.002 m³/s |
| 2.5 L/s | 0.0025 m³/s |
| 5 L/s | 0.005 m³/s |
| 7.5 L/s | 0.0075 m³/s |
| 10 L/s | 0.01 m³/s |
| 15 L/s | 0.015 m³/s |
| 20 L/s | 0.02 m³/s |
| 25 L/s | 0.025 m³/s |
| 50 L/s | 0.05 m³/s |
| 75 L/s | 0.075 m³/s |
| 100 L/s | 0.1 m³/s |
| 250 L/s | 0.25 m³/s |
| 500 L/s | 0.5 m³/s |
| 1000 L/s | 1 m³/s |
Where it's used
Liters per Second are used for ventilation rates per person (ASHRAE 62.1, EN 16798), while cubic meters per second appear in river and channel discharge. Both measure volumetric flow rate (volume per unit time), so the conversion is a fixed factor.
Liter per Second to other flow rate units
| Conversion | 1 L/s equals |
|---|---|
| liter per second to cubic meter per second | 0.001 m³/s |
| liter per second to cubic meter per hour | 3.6 m³/h |
| liter per second to liter per minute | 60 L/min |
| liter per second to cubic centimeter per second | 1000 cm³/s |
| liter per second to cubic centimeter per minute | 60000 cm³/min |
| liter per second to sccm | 60000 sccm |
| liter per second to SLPM | 60 SLPM |
| liter per second to cubic foot per minute | 2.118880003 CFM |
| liter per second to US gallon per minute | 15.85032314 GPM |
Frequently asked questions
How many cubic meters per second are in 1 liter per second?
1 L/s = 0.001 m³/s.
How do I convert liters per second to cubic meters per second?
Multiply the value in L/s by 0.001, or divide it by 1000. For example, 15 L/s × 0.001 = 0.015 m³/s.
Is the L/s to m³/s conversion exact?
Yes. Both units are defined exactly, and 1 L/s is exactly 0.001 m³/s.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 8 (litre).
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 2, coherent derived units.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Liters per Second to Cubic Meters per Second. Retrieved October 17, 2026, from https://scientificconverters.com/flow-rate/liters-per-second-to-cubic-meters-per-second/
IEEE
Scientific Converters, "Convert Liters per Second to Cubic Meters per Second," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/flow-rate/liters-per-second-to-cubic-meters-per-second/