GPH to Liters per Second Converter
Enter the flow rate in gph below to convert it to liters per second.
Convert GPH (US) to Liters per Second
Enter a value in gph (us) (GPH) to convert to liters per second (L/s).
US Gallons per Hour to Liters per Second Conversion Table
Table showing various us gallons per hour measurements converted to liters per second. Click any preset value or arrow to load it into the converter.
| GPH (US) (GPH) | Liters per Second (L/s) |
|---|---|
| 1 GPH | 0.0010515 L/s |
| 2 GPH | 0.002103 L/s |
| 2.5 GPH | 0.0026288 L/s |
| 5 GPH | 0.0052575 L/s |
| 10 GPH | 0.010515 L/s |
| 15 GPH | 0.0157725 L/s |
| 20 GPH | 0.0210301 L/s |
| 25 GPH | 0.0262876 L/s |
| 30 GPH | 0.0315451 L/s |
| 50 GPH | 0.0525752 L/s |
How to Convert GPH to Liters per Second
To convert gph to liters per second, multiply the flow rate by the following conversion ratio: 0.0010515 liters per second/us gallons per hour.
Since one us gallons per hour is equal to 0.0010515 liters per second, you can use this simple formula to convert:
The flow rate in liters per second is equal to the flow rate in gph multiplied by 0.0010515.
For example, here's how to convert 5 gph to liters per second using the formula above.
How Many Liters per Second Are in a US Gallons per Hour?
There are 0.0010515 liters per second 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 second 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 second 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 Second?
A liters per second is a unit of flow rate equal to 60 liters per minute (L/min), the base unit for flow rate. Equal to 60 L/min. [2]
The liters per second is classified as a metric and SI-compatible unit of flow rate. Liters per Second can be abbreviated as L/s; for example, 1 liters per second can be written as 1 L/s.
When working with liters per second (L/s) in formulas or technical specifications, always verify whether your target system uses SI metric, US customary, or British imperial standards.
In practice, liters per second (L/s) 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 second (L/s), keep full floating-point precision (1 GPH = 0.0010515 L/s; 1 L/s = 951.0193885 GPH) during intermediate calculations and round only the final liters per second figure to match your instrument tolerance.
More US Gallons per Hour & Liters per Second Conversions
Need to calculate in the opposite direction? Use our liters per second to gph (us) calculator to switch your starting unit immediately. You can also explore related tools such as converting liters per second to gph (us), converting liters per minute to gpm (us), or converting gpm (us) 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 Second (L/s)
- [2]NIST OWM SpecificationNIST OWM (SI Units — Volume & Flow Capacity)·Unit Specifications: US Gallons per Hour (GPH) (GPH) & Liters per Second (L/s)
- [3]BIPM ReferenceBIPM (Coherent Volumetric Flow Units (m³/s))·Conversion Factors & Mathematical Basis (GPH to L/s)