Liter per Second to Cubic Foot per Second (LPS to CFS)
Convert LPS to CFS — Flow Rate converter
One liter per second equals 0.03531467 CFS, so to convert liters per second to cubic feet per second you multiply the value by 0.03531467. A liter per second is smaller than a cubic foot per second — going the other way, 1 CFS = 28.316847 LPS. For example, 10 LPS = 0.35314667 CFS and 50 LPS = 1.765733 CFS.
1 LPS = 0.03531467 CFS
Liter per Second to Cubic Foot per Second formula
1 Liter per Second = 0.03531467 CFS
Worked examples
- 25 LPS = 0.88286667 CFS
- 100 LPS = 3.531467 CFS
Liter per Second to Cubic Foot per Second conversion table
| Liter per Second (LPS) | Cubic Foot per Second (CFS) |
|---|---|
| 1 | 0.03531467 |
| 2 | 0.07062933 |
| 3 | 0.105944 |
| 5 | 0.17657333 |
| 8 | 0.28251733 |
| 10 | 0.35314667 |
| 12 | 0.423776 |
| 15 | 0.52972 |
| 20 | 0.70629333 |
| 25 | 0.88286667 |
| 50 | 1.765733 |
| 100 | 3.531467 |
| 250 | 8.828667 |
| 500 | 17.657333 |
| 1000 | 35.314667 |
Which gallon, and which trade
The single most expensive mistake in flow conversion is the gallon. A US liquid gallon is 3.785411784 litres; an imperial gallon is 4.54609 litres. US GPM and imperial GPM differ by about 20%, and pump datasheets frequently do not say which one they mean. Check the manufacturer's country of origin before trusting a GPM figure.
Different trades default to different units for the same physical quantity: HVAC and compressed air work in CFM, plumbing and pumps in GPM or LPM, and process and water engineering in m³/h or L/s. A specification that mixes them is usually quoting different equipment, not different flows. On this page, 1 LPS = 0.03531467 CFS.
Frequently asked questions
How many cubic feet per second are in one liter per second?
One liter per second equals 0.03531467 cubic feet per second (CFS).
How many liters per second are in one cubic foot per second?
One cubic foot per second equals 28.316847 liters per second (LPS).
How do you convert liters per second to cubic feet per second?
1 Liter per Second = 0.03531467 CFS. Use the calculator above for any value.
What is 5 LPS in CFS?
5 LPS = 0.17657333 CFS.
What is 100 LPS in CFS?
100 LPS = 3.531467 CFS.
What is 10 LPS in CFS?
10 LPS = 0.35314667 CFS.
What is 20 LPS in CFS?
20 LPS = 0.70629333 CFS.
What is 50 LPS in CFS?
50 LPS = 1.765733 CFS.
What is 500 LPS in CFS?
500 LPS = 17.657333 CFS.
Is a liter per second bigger than a cubic foot per second?
No. A liter per second is smaller — one liter per second equals 0.03531467 cubic feet per second, while one cubic foot per second equals 28.316847 liters per second.