GPH to Liters per Hour Converter
Enter the flow rate in gph below to convert it to liters per hour.
Convert GPH (US) to Liters per Hour
Enter a value in gph (us) (GPH) to convert to liters per hour (L/h).
US Gallons per Hour to Liters per Hour Conversion Table
Table showing various us gallons per hour measurements converted to liters per hour. Click any preset value or arrow to load it into the converter.
| GPH (US) (GPH) | Liters per Hour (L/h) |
|---|---|
| 1 GPH | 3.7854118 L/h |
| 2 GPH | 7.5708236 L/h |
| 2.5 GPH | 9.4635295 L/h |
| 5 GPH | 18.9270589 L/h |
| 10 GPH | 37.8541178 L/h |
| 15 GPH | 56.7811768 L/h |
| 20 GPH | 75.7082357 L/h |
| 25 GPH | 94.6352946 L/h |
| 30 GPH | 113.5623535 L/h |
| 50 GPH | 189.2705892 L/h |
How to Convert GPH to Liters per Hour
To convert gph to liters per hour, multiply the flow rate by the following conversion ratio: 3.7854118 liters per hour/us gallons per hour.
Since one us gallons per hour is equal to 3.7854118 liters per hour, you can use this simple formula to convert:
The flow rate in liters per hour is equal to the flow rate in gph multiplied by 3.7854118.
For example, here's how to convert 5 gph to liters per hour using the formula above.
How Many Liters per Hour Are in a US Gallons per Hour?
There are 3.7854118 liters per hour in a us gallons per hour, which is why we use this value in the formula above.
Our us gallons per hour to liters per hour calculator automatically converts your flow rate measurements with full decimal and scientific precision across US customary, imperial, and SI metric standards.
GPH and liters per hour are both units used to measure flow rate. Keep reading to learn more about each unit.
What Is a US Gallons per Hour?
A us gallons per hour is a unit of flow rate equal to 0.0630902 liters per minute (L/min), the base unit for flow rate. Equal to 1/60 GPM (0.06309 L/min). [1]
The us gallons per hour is classified as a US customary unit of flow rate. GPH can be abbreviated as GPH; for example, 1 us gallons per hour can be written as 1 GPH.
When working with gph (GPH) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, gph (GPH) are widely used across standard flow rate applications within US customary workflows, engineering documentation, and technical data sheets.
What Is a Liters per Hour?
A liters per hour is a unit of flow rate equal to 1/60 of a liters per minute (0.0166667 L/min). Equal to 1/60 L/min. [2]
The liters per hour is classified as a metric and SI-compatible unit of flow rate. Liters per Hour can be abbreviated as L/h; for example, 1 liters per hour can be written as 1 L/h.
When working with liters per hour (L/h) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, liters per hour (L/h) are widely used across standard flow rate applications within SI metric workflows, engineering documentation, and technical data sheets.
When converting flow rate between gph (GPH) and liters per hour (L/h), keep full floating-point precision (1 GPH = 3.7854118 L/h; 1 L/h = 0.2641721 GPH) during intermediate calculations and round only the final liters per hour figure to match your instrument tolerance.
More US Gallons per Hour & Liters per Hour Conversions
Need to calculate in the opposite direction? Use our liters per hour to gph (us) converter (L/h to GPH) to switch your starting unit immediately. You can also explore related tools such as converting liters per minute to gpm (us), converting gpm (us) to liters per minute, or converting cfh to liters per minute.
Convert from GPH
Frequently Asked Questions
References
- [1]NIST SP 811 StandardNIST SP 811 (NIST SP 811 App. B.9 (Volume Divided by Time))·Flow Rate Metrology Standard — GPH (US) (GPH) to Liters per Hour (L/h)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: US Gallons per Hour (GPH) (GPH) & Liters per Hour (L/h)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (GPH to L/h)