18 Gallon (US)/Hour to Liter/Hour
Quick answer
18 Gallon (US)/Hour (gph) equals
68.137412 L/h
To convert 18 Gallon (US)/Hours to Liter/Hours, multiply by 3.7854117828. Therefore, 18 Gallon (US)/Hour (gph) equals 68.137412 Liter/Hour (L/h).
Formula: L/h = gph × 3.7854117828. Calculation: 18 × 3.7854117828 = 68.137412 L/h.
Convert Gallon (US)/Hour (gph) to Liter/Hour (L/h) online with our free unit converter. In flow rate, 1 gph = 3.785412 L/h. Explore step-by-step conversion steps, mathematical formulas, and quick conversion reference tables below.
Worked example: converting Gallon (US)/Hour to Liter/Hour
- Step 1 — start with the formula. L/h = gph × 3.7854117828
- Step 2 — substitute your figure. 18 gph × 3.7854117828
- Step 3 — read the result. 18 gph = 68.137412 L/h
- Step 4 — check it in reverse. gph = L/h × 0.2641720524 returns 18 gph, which matches the figure you started with.
Flow Rate Converter
14 units available
18 gph = 68.137412 L/h
Formula:
L/h = gph × 3.7854117828With your value: 18 gph = 68.13741209 L/h
Other Gallon (US)/Hour to Liter/Hour conversions
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
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
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
Gallon (US)/Hour and Liter/Hour Relationship
This calculation facilitates standardized conversion between recognized units of flow rate. Since 1 Gallon (US)/Hour equals approximately 3.7854 Liter/Hours, the Gallon (US)/Hour represents a larger unit interval than the Liter/Hour. Understanding the relationship between Gallon (US)/Hour and Liter/Hour is essential for accurate calculations in physics, engineering, commerce, and daily applications.
About Gallon (US)/Hour
The Gallon (US)/Hour (symbol: gph) is a recognized unit in the Standard measurement framework, utilized within flow rate applications for precision and standardized data representation.
Common uses of Gallon (US)/Hour: flow rate calculations, engineering and science, education.
About Liter/Hour
The Liter/Hour (symbol: L/h) is a recognized unit in the Metric (SI) measurement framework, utilized within flow rate applications for precision and standardized data representation.
Common uses of Liter/Hour: flow rate calculations, engineering and science, education.
Frequently Asked Questions
- What is 18 Gallon (US)/Hour in Liter/Hour?
- 18 Gallon (US)/Hour equals 68.137412 Liter/Hour.
- How many Liter/Hours are in 1 Gallon (US)/Hour?
- There are exactly 3.7854117828 Liter/Hours 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)/Hours to Liter/Hours, you would multiply 10 by 3.7854117828.
- What is a Gallon (US)/Hour?
- The Gallon (US)/Hour (symbol: gph) is a recognized unit in the Standard measurement framework, utilized within flow rate applications for precision and standardized data representation.
- What is a Liter/Hour?
- The Liter/Hour (symbol: L/h) is a recognized unit in the Metric (SI) measurement framework, utilized within flow rate applications for precision and standardized data representation.
- What are the common uses of Gallon (US)/Hour?
- The Gallon (US)/Hour is commonly used in flow rate calculations, engineering and science, education.
Related Flow Rate Conversions
Cite this page
UnitConvertLab. (2026). 18 Gallon (US)/Hour to Liter/Hour. UnitConvertLab. Retrieved from https://unitconvertlab.com/convert/18-gph_us-to-liter_per_hour