Gallon (US)/Hour to Liter/Hour Converter

Flow Rate Converter

14 units available

Decimals:

From

To

3.785412

1 gph = 3.785412 L/h

Formula:

L/h = gph × 3.7854117828

With your value: 1 gph = 3.78541178 L/h

Other Gallon (US)/Hour to Liter/Hour conversions

2 gph to L/h 3 gph to L/h 4 gph to L/h 5 gph to L/h 6 gph to L/h 7 gph to L/h 8 gph to L/h

Gallon (US)/Hour to Liter/Hour Conversion Table

Gallon (US)/Hour (gph)	Liter/Hour (L/h)
0.5	1.892706
1	3.785412
2	7.570824
5	18.927059
10	37.854118
15	56.781177
20	75.708236
25	94.635295
50	189.270589
100	378.541178
250	946.352946
500	1,892.705891
1000	3,785.411783

Liter/Hour to Gallon (US)/Hour Conversion Table

Liter/Hour (L/h)	Gallon (US)/Hour (gph)
0.5	0.132086
1	0.264172
2	0.528344
5	1.32086
10	2.641721
15	3.962581
20	5.283441
25	6.604301
50	13.208603
100	26.417205
250	66.043013
500	132.086026
1000	264.172052

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Gallon (US)/Hour (gph)

Flow Rate

Exact conversion

Derived quantity: a defined volume divided by a defined time interval (m³/s). All listed units are exact multiples of the cubic metre per second.

Source: ISO 80000, Quantities and units (all parts)

International Organization for Standardization · Reviewed 2026-07-01

Liter/Hour (L/h)

Flow Rate

Exact conversion

Derived quantity: a defined volume divided by a defined time interval (m³/s). All listed units are exact multiples of the cubic metre per second.

Source: ISO 80000, Quantities and units (all parts)

International Organization for Standardization · Reviewed 2026-07-01

How to Convert Gallon (US)/Hour to Liter/Hour

To convert from Gallon (US)/Hour (gph) to Liter/Hour (L/h), multiply the value by 3.7854117828.

Formula: L/h = gph × 3.7854117828

Reverse: gph = L/h × 0.2641720524

Step-by-Step Example

Start with your value in Gallon (US)/Hour. For example: 5 gph
Multiply by the conversion factor: 5 x 3.7854117828
The result is: 18.927059 L/h

About Gallon (US)/Hour

The gallon (us)/hour (gph) is a unit of flow rate. One gallon (us)/hour equals 1.051503 × 10^-6 base units. UnitConvertLab converts it against every other flow rate unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: flow rate calculations, engineering and science, education.

About Liter/Hour

The liter/hour (L/h) is a unit of flow rate. One liter/hour equals 2.777778 × 10^-7 base units. UnitConvertLab converts it against every other flow rate unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: flow rate calculations, engineering and science, education.

Frequently Asked Questions

How many Liter/Hour are in 1 Gallon (US)/Hour?

There are exactly 3.7854117828 Liter/Hour in 1 Gallon (US)/Hour. This means the conversion factor from Gallon (US)/Hour to Liter/Hour is 3.7854117828.

What is the formula to convert Gallon (US)/Hour to Liter/Hour?

The formula to convert Gallon (US)/Hour to Liter/Hour is: L/h = gph × 3.7854117828. For example, to convert 10 Gallon (US)/Hour to Liter/Hour, you would multiply 10 by 3.7854117828.

What is a Gallon (US)/Hour?