GPM to LPS Calculator
Convert flow rate in gallons per minute (GPM) to liters per second (LPS) with this professional flow rate calculator. Ideal for pump sizing, water treatment systems, and irrigation modeling, it delivers fast, expert-verified results instantly.
GPM to LPS Calculator
How to Use GPM to LPS Calculator
Converting volumetric flow rate from gallons per minute to liters per second is simple with this tool. If you need other conversions, you can check our GPM to CFS Calculator or GPM to MGD Calculator. Sizing fluid mechanics systems, choosing booster pumps, and verifying flow dynamics require accurate conversions. Follow this professional workflow to obtain verified flow results:
- 1Enter the flow rate value in gallons per minute (GPM) in the numeric input box.
- 2Choose your desired decimal precision from the dropdown menu.
- 3Click the Calculate button to process the flow conversion.
- 4View the equivalent flow rate in liters per second (L/s) displayed in the main output card.
- 5Review secondary outputs such as liters per minute, cubic meters per hour, and gallons per hour in the details container.
How to Calculate GPM to LPS
Converting water flow rate values between US gallons per minute (GPM) and liters per second (LPS) requires utilizing the exact physical relationship between gallons, liters, and time. This is useful when comparing values against our GPM to PSI Calculator or when calculating large-scale discharges with the GPM to MGD Calculator. You can also use our general Flow Rate Calculator to evaluate pipeline velocity. Follow this standard conversion formula:
Where:
- LPS = Volumetric flow rate in liters per second
- GPM = Volumetric flow rate in gallons per minute
- 0.0630902 = The standard multiplier coefficient to convert gallons per minute to liters per second
Step-by-Step Practical Example
Convert a water pump discharge flow rate of 100 GPM into liters per second:
Given:
Flow Rate = 100 GPM
Calculation:
Result:
100 GPM = 6.309 L/s
Where is GPM to LPS Conversion Used?
This flow rate conversion is a standard calculation in major environmental and piping designs:
- Irrigation systems: Sizing sprinkler networks and main irrigation channels.
- Water distribution: Sizing municipal lines, water towers, and intake facilities.
- Pump performance calculations: Matching pumps rated in GPM to environmental flow charts defined in LPS.
- Hydraulic studies: Sizing wastewater treatment systems, open channels, and piping systems.
GPM to LPS Chart
This reference chart displays conversions from gallons per minute (GPM) to liters per second (LPS). All values are calculated using the standard flow rate conversion factor and are rounded to four decimal places for precise engineering references.
| Flow Rate (GPM) | Flow Rate (L/s) |
|---|---|
| 1 GPM | 0.0631 L/s |
| 5 GPM | 0.3155 L/s |
| 10 GPM | 0.6309 L/s |
| 20 GPM | 1.2618 L/s |
| 50 GPM | 3.1545 L/s |
| 100 GPM | 6.3090 L/s |
| 200 GPM | 12.6180 L/s |
| 500 GPM | 31.5451 L/s |
| 1000 GPM | 63.0902 L/s |
Note: All calculations in the table are rounded to four decimal places. Use the calculator above to model custom operating parameters.
Unit Standardization: SI vs. Imperial Sizing in GPM to LPS
When working with GPM to LPS calculations, using consistent physical units is vital. Small translation errors between SI Metric units (like millimeters, kilowatts, and meters) and Imperial units (like AWG wire, horsepower, and feet) can lead to serious sizing errors:
| Dimension | SI Metric Unit | Imperial Unit | Conversion Conversion Factor |
|---|---|---|---|
| Power | Kilowatts (kW) | Horsepower (HP) | 1 kW ≈ 1.341 HP |
| Length | Meters (m) | Feet (ft) | 1 m ≈ 3.2808 ft |
| Flow Rate | Cubic meters/hr (m³/h) | Gallons/minute (GPM) | 1 m³/h ≈ 4.403 GPM |
Always perform unit checks before installing physical components for GPM to LPS to ensure they match equipment specification sheets.
Frequently Asked Questions (FAQs)
To convert US gallons per minute (GPM) to liters per second (LPS), you need to multiply the GPM value by 0.0630902. This conversion factor translates the flow rate from US volumetric units per minute into metric volumetric units per second.
The formula for converting US gallons per minute to liters per second is: LPS = GPM × 0.0630902. Alternatively, you can first convert GPM to liters per minute by multiplying by 3.78541, and then divide that result by 60 to find the LPS value.
Converting GPM to LPS is often required in scientific, engineering, and fluid dynamics applications where the metric system is the standard. Liters per second provides a precise, standardized measurement for analyzing very rapid fluid flow rates.
If you have a flow rate of 100 US gallons per minute, you multiply 100 by the conversion factor of 0.0630902. The result is approximately 6.31 liters per second. This calculation is vital when sizing international pipes and pumping equipment.
No, the conversion from gallons per minute to liters per second is strictly a volumetric calculation. It does not depend on the density, viscosity, or temperature of the liquid. The conversion factor remains exactly the same for all fluids.