Convert Litres per Second to Cusecs (L/s to ft3/s)
1 litre per second (L/s) = 0.03531466672 cusecs (ft³/s). 1 ft³/s = 28.31684659 L/s. Example: 15 L/s = 15 × 0.03531466672 = 0.5297200008 ft³/s.
Also searched as litres per second to ft3/s, litres per second in ft3/s, litres per second into cusecs, L/s to ft3/s, L/s in cusecs, L/s into cusec, litre per second to cusec, L/s to cusecs converter, liters per second to cusecs and how many cusecs in a litre per second.
1 L/s = 0.03531466672 ft³/s
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk litre per second to cusec converter to paste a column from Excel.
How to Convert Litre per Second to Cusec
- 1 L/s = 0.03531466672 ft³/s
- 1 ft³/s = 28.31684659 L/s
- Example: convert 15 L/s to ft³/s: 15 L/s = 15 × 0.03531466672 ft³/s = 0.5297200008 ft³/s
Formula
ft³/s = L/s × 0.03531466672149
or ft³/s = L/s ÷ 28.316846592
Derivation from SI units:
- 1 L/s = 10⁻³ m³/s.
- 1 cusec = 1 ft³/s = 0.028316846592 m³/s.
- 1 L/s = 0.001 m³/s ÷ 0.028316846592 m³/s per ft³/s = 0.03531466672149 ft³/s
Both units are defined exactly, so the factor is exact. Litre per Second definition: litre per second; Cusec definition: cusec.
Worked examples
- A reading of 5 L/s converts to 0.1765733336 ft³/s.
5 L/s × 0.03531466672 = 0.1765733336 ft³/s - A value of 50 L/s is 1.765733336 ft³/s.
50 L/s × 0.03531466672 = 1.765733336 ft³/s
Litre per Second to Cusec conversion table
| Litres per Second (L/s) | Cusecs (ft³/s) |
|---|---|
| 0.5 L/s | 0.01765733336 ft³/s |
| 1 L/s | 0.03531466672 ft³/s |
| 2 L/s | 0.07062933344 ft³/s |
| 5 L/s | 0.1765733336 ft³/s |
| 10 L/s | 0.3531466672 ft³/s |
| 25 L/s | 0.882866668 ft³/s |
| 50 L/s | 1.765733336 ft³/s |
| 100 L/s | 3.531466672 ft³/s |
| 500 L/s | 17.65733336 ft³/s |
| 1000 L/s | 35.31466672 ft³/s |
Where it's used
Litres per Second are used for tube-well and pump discharge, while cusecs appear in canal and dam releases in India (e.g. Cauvery releases). Both measure volumetric discharge of rivers, canals and water supply, so the conversion is a fixed factor.
Litre per Second to other water discharge units
| Conversion | 1 L/s equals |
|---|---|
| litre per second to cusec | 0.03531466672 ft³/s |
| litre per second to cumec | 0.001 m³/s |
| litre per second to MLD | 0.0864 MLD |
| litre per second to cubic metre per day | 86.4 m³/day |
| litre per second to MGD | 0.02282446532 MGD |
| litre per second to MGD (imp) | 0.01900534305 MGD (imp) |
| litre per second to acre-foot per day | 0.07004561994 acre-ft/day |
Frequently asked questions
How many cusecs are in 1 litre per second?
1 L/s = 0.03531466672 ft³/s.
How do I convert litres per second to cusecs?
Multiply the value in L/s by 0.03531466672, or divide it by 28.31684659. For example, 15 L/s × 0.03531466672 = 0.5297200008 ft³/s.
Is the L/s to ft³/s conversion exact?
Yes. Both units are defined exactly, so the ratio is exact; its decimal form does not terminate and is shown here to 10 significant figures (more with the precision selector).
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 4 (derived units) and Table 8 (non-SI units accepted for use with the SI).
- Guide for the Use of the International System of Units (SI), NIST Special Publication 811, 2008 Edition, National Institute of Standards and Technology , Appendix B.8, "cubic foot per second".
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 Litres per Second to Cusecs (L/s to ft3/s). Retrieved October 29, 2026, from https://scientificconverters.com/discharge/liters-per-second-to-cusecs/
IEEE
Scientific Converters, "Convert Litres per Second to Cusecs (L/s to ft3/s)," scientificconverters.com. Accessed: Oct. 29, 2026. [Online]. Available: https://scientificconverters.com/discharge/liters-per-second-to-cusecs/