cfs to l-s | Exact Decimal + Formula

1 Cubic Foot / Second = 28.31685 Liter / Second

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

About Cubic Foot / Second and Liter / Second

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.

Liter / Second (L/s)

Liters per second measures larger volumetric flows.

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

Flow Rate Converter

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Precision

Formula

L/s = cfs × 28.31685

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

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

Cubic Foot / Second	Liter / Second (Decimal)	Fraction	Real-world equivalent
0.001 cfs	0.028317 L/s	-	fractional unit measurement
0.01 cfs	0.283169 L/s	-	fractional unit measurement
0.1 cfs	2.831685 L/s	-	standard single unit scale
0.5 cfs	14.158425 L/s	-	multiple unit increments
1 cfs	28.31685 L/s	-	multiple unit increments
2 cfs	56.6337 L/s	-	multiple unit increments
5 cfs	141.58425 L/s	-	multiple unit increments
10 cfs	283.1685 L/s	-	multiple unit increments
25 cfs	707.92125 L/s	-	multiple unit increments
50 cfs	1415.8425 L/s	-	multiple unit increments
100 cfs	2831.685 L/s	-	multiple unit increments
250 cfs	7079.2125 L/s	-	multiple unit increments
500 cfs	14158.425 L/s	-	multiple unit increments
1000 cfs	28316.85 L/s	-	multiple unit increments

cfs to L/s Formula and Examples

Direct Formula L/s = cfs × 28.31685

Inverse Formula cfs = L/s × 0.035315

Mental Math Shortcut

Multiply the value by roughly 28.3 to calculate the equivalent amount in your head.

Common Cubic Foot / Second to Liter / Second Calculations

5 cfs = 141.58425 L/s
10 cfs = 283.1685 L/s
50 cfs = 1415.8425 L/s
100 cfs = 2831.685 L/s
500 cfs = 14158.425 L/s

Precision & Practical Use

For example, 10 cfs = 283.1685 L/s — roughly multiple unit increments.

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 Cubic Foot / Second to Liter / Second

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

One Cubic Foot / Second (cfs) equals 28.31685 Liter / Second (L/s). To convert cubic foot / seconds to liter / seconds, multiply the cubic foot / second value by 28.31685.

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

Multiply your cubic foot / second value by 28.31685 to get the result in Liter / Second: L/s = cfs × 28.31685. For example, 5 cfs = 141.58425 L/s.

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

The conversion formula is L/s = cfs × 28.31685. 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 cfs to L/s?