m3-s to cfs | Exact Decimal + Formula

1 Cubic Meter / Second = 35.314662 Cubic Foot / Second

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

About Cubic Meter / Second and Cubic Foot / Second

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.

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.

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Precision

Formula

cfs = m³/s × 35.314662471

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

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

Cubic Meter / Second	Cubic Foot / Second (Decimal)	Fraction	Real-world equivalent
0.001 m³/s	0.035315 cfs	-	fractional unit measurement
0.01 m³/s	0.353147 cfs	-	fractional unit measurement
0.1 m³/s	3.531466 cfs	-	standard single unit scale
0.5 m³/s	17.657331 cfs	-	multiple unit increments
1 m³/s	35.314662 cfs	-	multiple unit increments
2 m³/s	70.629325 cfs	-	multiple unit increments
5 m³/s	176.573312 cfs	-	multiple unit increments
10 m³/s	353.146625 cfs	-	multiple unit increments
25 m³/s	882.866562 cfs	-	multiple unit increments
50 m³/s	1765.733124 cfs	-	multiple unit increments
100 m³/s	3531.466247 cfs	-	multiple unit increments
250 m³/s	8828.665618 cfs	-	multiple unit increments
500 m³/s	17657.331236 cfs	-	multiple unit increments
1000 m³/s	35314.662471 cfs	-	multiple unit increments

m³/s to cfs Formula and Examples

Direct Formula cfs = m³/s × 35.314662471

Inverse Formula m³/s = cfs × 0.028317

Mental Math Shortcut

Multiply the value by roughly 35.3 to calculate the equivalent amount in your head.

Common Cubic Meter / Second to Cubic Foot / Second Calculations

5 m³/s = 176.573312 cfs
10 m³/s = 353.146625 cfs
50 m³/s = 1765.733124 cfs
100 m³/s = 3531.466247 cfs
500 m³/s = 17657.331236 cfs

Precision & Practical Use

For example, 10 m³/s = 353.146625 cfs — 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 Meter / Second to Cubic Foot / Second

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

One Cubic Meter / Second (m³/s) equals 35.314662 Cubic Foot / Second (cfs). To convert cubic meter / seconds to cubic foot / seconds, multiply the cubic meter / second value by 35.314662.

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

Multiply your cubic meter / second value by 35.314662 to get the result in Cubic Foot / Second: cfs = m³/s × 35.314662. For example, 5 m³/s = 176.573312 cfs.

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

The conversion formula is cfs = m³/s × 35.314662. 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 m³/s to cfs?