cfs to m3-s | Exact Decimal + Formula

1 Cubic Foot / Second = 0.028317 Cubic Meter / Second

One cubic meter / second equals about 35.3 cubic feet / second (exactly 35.31466247 cfs). Real-world use: US stream gauging and storm-water engineering. This page expresses those values in cubic meters / second, which is used for river discharge, dam turbine capacity, and HVAC air volumes. Use the calculator above, then check the reference table for common values from 0.001 to 1000.

About Cubic Foot / Second and Cubic Meter / 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.

Cubic Meter / Second (m³/s)

Cubic meters per second is the SI unit of volumetric flow.

Where it's used: River discharge, dam turbine capacity, and HVAC air volumes.

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Formula

m³/s = cfs × 0.02831685

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

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

Cubic Foot / Second	Cubic Meter / Second (Decimal)	Fraction	Real-world equivalent
0.001 cfs	0.000028 m³/s	-	fractional unit measurement
0.01 cfs	0.000283 m³/s	-	fractional unit measurement
0.1 cfs	0.002832 m³/s	-	fractional unit measurement
0.5 cfs	0.014158 m³/s	-	fractional unit measurement
1 cfs	0.028317 m³/s	-	fractional unit measurement
2 cfs	0.056634 m³/s	-	fractional unit measurement
5 cfs	0.141584 m³/s	-	fractional unit measurement
10 cfs	0.283168 m³/s	-	fractional unit measurement
25 cfs	0.707921 m³/s	-	fractional unit measurement
50 cfs	1.415843 m³/s	-	standard single unit scale
100 cfs	2.831685 m³/s	-	standard single unit scale
250 cfs	7.079212 m³/s	-	standard single unit scale
500 cfs	14.158425 m³/s	-	multiple unit increments
1000 cfs	28.31685 m³/s	-	multiple unit increments

cfs to m³/s Formula and Examples

Direct Formula m³/s = cfs × 0.02831685

Inverse Formula cfs = m³/s × 35.314662

Mental Math Shortcut

Divide the value by roughly 35.3 to quickly estimate the converted result.

Common Cubic Foot / Second to Cubic Meter / Second Calculations

5 cfs = 0.141584 m³/s
10 cfs = 0.283168 m³/s
50 cfs = 1.415843 m³/s
100 cfs = 2.831685 m³/s
500 cfs = 14.158425 m³/s

Precision & Practical Use

For example, 10 cfs = 0.283168 m³/s — 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 Cubic Foot / Second to Cubic Meter / Second

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

One Cubic Foot / Second (cfs) equals 0.028317 Cubic Meter / Second (m³/s). To convert cubic foot / seconds to cubic meter / seconds, multiply the cubic foot / second value by 0.028317.

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

Multiply your cubic foot / second value by 0.028317 to get the result in Cubic Meter / Second: m³/s = cfs × 0.028317. For example, 5 cfs = 0.141584 m³/s.

What is the formula for converting cfs to m³/s?

The conversion formula is m³/s = cfs × 0.028317. 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 m³/s?