cfs to gpm | Exact Decimal + Formula

1 Cubic Foot / Second = 448.831197 US Gallon / Minute

One cubic foot / second equals about 449 US gallons / minute (exactly 448.8311972 gpm). Real-world use: US stream gauging and storm-water engineering. This page expresses those values in US gallons / minute, which is used for well pumps, pool pumps, and irrigation systems in the united states. Enter any value above — the result updates instantly, and a 1–1000 reference table follows below.

About Cubic Foot / Second and US Gallon / Minute

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.

US Gallon / Minute (gpm)

US gallons per minute measures flow in imperial units; one GPM is about 3.785 L/min.

Where it's used: Well pumps, pool pumps, and irrigation systems in the United States.

Flow Rate Converter

From

Tab Switch fieldsS SwapC Copy

Precision

Formula

gpm = cfs × 448.831197238

To convert Cubic Foot / Second to US Gallon / Minute, use the formula displayed above.

Pinned Favorites

No pinned converters yet. Click the star button to pin common pairs.

Recent History

Conversions you copy will be recorded here.

Cubic Foot / Second to US Gallon / Minute: Quick Reference Table

Cubic Foot / Second	US Gallon / Minute (Decimal)	Fraction	Real-world equivalent
0.001 cfs	0.448831 gpm	-	fractional unit measurement
0.01 cfs	4.488312 gpm	-	standard single unit scale
0.1 cfs	44.88312 gpm	-	multiple unit increments
0.5 cfs	224.415599 gpm	-	multiple unit increments
1 cfs	448.831197 gpm	-	multiple unit increments
2 cfs	897.662394 gpm	-	multiple unit increments
5 cfs	2244.155986 gpm	-	multiple unit increments
10 cfs	4488.311972 gpm	-	multiple unit increments
25 cfs	11220.779931 gpm	-	multiple unit increments
50 cfs	22441.559862 gpm	-	multiple unit increments
100 cfs	44883.119724 gpm	-	multiple unit increments
250 cfs	112207.79931 gpm	-	multiple unit increments
500 cfs	224415.598619 gpm	-	multiple unit increments
1000 cfs	448831.197238 gpm	-	multiple unit increments

cfs to gpm Formula and Examples

Direct Formula gpm = cfs × 448.831197238

Inverse Formula cfs = gpm × 0.002228

Mental Math Shortcut

Multiply the value by roughly 448.8 to calculate the equivalent amount in your head.

Common Cubic Foot / Second to US Gallon / Minute Calculations

5 cfs = 2244.155986 gpm
10 cfs = 4488.311972 gpm
50 cfs = 22441.559862 gpm
100 cfs = 44883.119724 gpm
500 cfs = 224415.598619 gpm

Precision & Practical Use

For example, 10 cfs = 4488.311972 gpm — 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 US Gallon / Minute

How many us gallon / minutes are in one cubic foot / second?

One Cubic Foot / Second (cfs) equals 448.831197 US Gallon / Minute (gpm). To convert cubic foot / seconds to us gallon / minutes, multiply the cubic foot / second value by 448.831197.

How do I convert Cubic Foot / Second to US Gallon / Minute?

Multiply your cubic foot / second value by 448.831197 to get the result in US Gallon / Minute: gpm = cfs × 448.831197. For example, 5 cfs = 2244.155986 gpm.

What is the formula for converting cfs to gpm?

The conversion formula is gpm = cfs × 448.831197. 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 gpm?