gpm to l-s | Exact Decimal + Formula

1 US Gallon / Minute = 0.06309 Liter / Second

One liter / second equals about 15.9 US gallons / minute (exactly 15.85032224 gpm). Real-world use: well pumps, pool pumps, and irrigation systems in the united states. This page expresses those values in liters / second, which is used for rivers, water treatment, and industrial pumping systems. Enter any value above — the result updates instantly, and a 1–1000 reference table follows below.

About US Gallon / Minute and Liter / Second

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.

Liter / Second (L/s)

Liters per second measures larger volumetric flows.

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

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Precision

Formula

L/s = gpm × 0.0630902

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

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US Gallon / Minute to Liter / Second: Quick Reference Table

US Gallon / Minute	Liter / Second (Decimal)	Fraction	Real-world equivalent
0.001 gpm	0.000063 L/s	-	fractional unit measurement
0.01 gpm	0.000631 L/s	-	fractional unit measurement
0.1 gpm	0.006309 L/s	-	fractional unit measurement
0.5 gpm	0.031545 L/s	-	fractional unit measurement
1 gpm	0.06309 L/s	-	fractional unit measurement
2 gpm	0.12618 L/s	-	fractional unit measurement
5 gpm	0.315451 L/s	-	fractional unit measurement
10 gpm	0.630902 L/s	-	fractional unit measurement
25 gpm	1.577255 L/s	-	standard single unit scale
50 gpm	3.15451 L/s	-	standard single unit scale
100 gpm	6.30902 L/s	-	standard single unit scale
250 gpm	15.77255 L/s	-	multiple unit increments
500 gpm	31.5451 L/s	-	multiple unit increments
1000 gpm	63.0902 L/s	-	multiple unit increments

gpm to L/s Formula and Examples

Direct Formula L/s = gpm × 0.0630902

Inverse Formula gpm = L/s × 15.850322

Mental Math Shortcut

Divide the value by roughly 15.9 to quickly estimate the converted result.

Common US Gallon / Minute to Liter / Second Calculations

5 gpm = 0.315451 L/s
10 gpm = 0.630902 L/s
50 gpm = 3.15451 L/s
100 gpm = 6.30902 L/s
500 gpm = 31.5451 L/s

Precision & Practical Use

For example, 10 gpm = 0.630902 L/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 US Gallon / Minute to Liter / Second

How many liter / seconds are in one us gallon / minute?

One US Gallon / Minute (gpm) equals 0.06309 Liter / Second (L/s). To convert us gallon / minutes to liter / seconds, multiply the us gallon / minute value by 0.06309.

How do I convert US Gallon / Minute to Liter / Second?

Multiply your us gallon / minute value by 0.06309 to get the result in Liter / Second: L/s = gpm × 0.06309. For example, 5 gpm = 0.315451 L/s.

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

The conversion formula is L/s = gpm × 0.06309. 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 gpm to L/s?