l-s to cfs | Exact Decimal + Formula

1 Liter / Second = 0.035315 Cubic Foot / Second

One cubic foot / second equals about 28.3 liters / second (exactly 28.31685 L/s). Real-world use: rivers, water treatment, and industrial pumping systems. This page expresses those values in cubic feet / second, which is used for US stream gauging and storm-water engineering. Type a value above for an instant answer; the exact formula and the reference table are below.

About Liter / Second and Cubic Foot / Second

Liter / Second (L/s)

Liters per second measures larger volumetric flows.

Where it's used: Rivers, water treatment, and industrial pumping systems.

Cubic Foot / Second (cfs)

Cubic feet per second measures large flows in imperial units, about 1,699 L/min.

Where it's used: US stream gauging and storm-water engineering.

Flow Rate Converter

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Precision

Formula

cfs = L/s × 0.035314662

To convert Liter / Second to Cubic Foot / Second, use the formula displayed above.

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Liter / Second to Cubic Foot / Second: Quick Reference Table

Liter / Second	Cubic Foot / Second (Decimal)	Fraction	Real-world equivalent
0.001 L/s	0.000035 cfs	-	fractional unit measurement
0.01 L/s	0.000353 cfs	-	fractional unit measurement
0.1 L/s	0.003531 cfs	-	fractional unit measurement
0.5 L/s	0.017657 cfs	-	fractional unit measurement
1 L/s	0.035315 cfs	-	fractional unit measurement
2 L/s	0.070629 cfs	-	fractional unit measurement
5 L/s	0.176573 cfs	-	fractional unit measurement
10 L/s	0.353147 cfs	-	fractional unit measurement
25 L/s	0.882867 cfs	-	fractional unit measurement
50 L/s	1.765733 cfs	-	standard single unit scale
100 L/s	3.531466 cfs	-	standard single unit scale
250 L/s	8.828666 cfs	-	standard single unit scale
500 L/s	17.657331 cfs	-	multiple unit increments
1000 L/s	35.314662 cfs	-	multiple unit increments

L/s to cfs Formula and Examples

Direct Formula cfs = L/s × 0.035314662

Inverse Formula L/s = cfs × 28.31685

Mental Math Shortcut

Divide the value by roughly 28.3 to quickly estimate the converted result.

Common Liter / Second to Cubic Foot / Second Calculations

5 L/s = 0.176573 cfs
10 L/s = 0.353147 cfs
50 L/s = 1.765733 cfs
100 L/s = 3.531466 cfs
500 L/s = 17.657331 cfs

Precision & Practical Use

For example, 10 L/s = 0.353147 cfs — roughly fractional unit measurement.

Results are computed to up to 9 decimal places. Round to the precision of your measuring instrument — for most flow rate applications, 2–3 significant figures are plenty.

Related Specialist Flow Rate Calculators & Niche Tools

Flow rate calculations measure fluid velocity, expressing volume per unit time. Typically calculated in Gallons per Minute (GPM) or Liters per Minute (LPM), these measurements are fundamental in plumbing, irrigation, and hydraulic system design.

Sizing a water pump or designing a sprinkler system requires translating fluid flow rates across metric and imperial systems. Flow calculators allow plumbers and civil engineers to determine if piping and valve sizes can handle specific GPM or LPM rates under pressure, optimizing fluid transport systems for peak output.

Flow gpm to lpm Convert liquid flow rates.

How to Convert Liter / Second to Cubic Foot / Second

How many cubic foot / seconds are in one liter / second?

One Liter / Second (L/s) equals 0.035315 Cubic Foot / Second (cfs). To convert liter / seconds to cubic foot / seconds, multiply the liter / second value by 0.035315.

How do I convert Liter / Second to Cubic Foot / Second?

Multiply your liter / second value by 0.035315 to get the result in Cubic Foot / Second: cfs = L/s × 0.035315. For example, 5 L/s = 0.176573 cfs.

What is the formula for converting L/s to cfs?

The conversion formula is cfs = L/s × 0.035315. Use the calculator above for any value, and see the reference table below for common inputs from 0.001 to 1000.

Is there a quick mental estimate for L/s to cfs?