An L/s calculator is a tool used to estimate the required Liters per Second (L/s) of liquid flow for various applications, such as water distribution, industrial fluid systems, or irrigation. To use this calculator, you need to input details such as the size of the area or system, the number of outlets or fixtures, and the type of activity being performed. Additionally, some calculators may require information on system efficiency, desired pressure, and external factors like elevation and pipe diameter. Based on these inputs, the L/s calculator computes the necessary flow rate to ensure optimal performance and efficiency. This aids in selecting appropriately sized pumps, pipes, and other equipment, optimizing liquid usage and system design.
L/s, which stands for Liters per Second, is a unit used to measure the flow rate of liquids, particularly water. It indicates the volume of liquid (in liters) that flows through a specific point in a system within one second.
To determine the flow rate in L/s for a pipe with a diameter of 50 mm and a velocity of 1.5 meters per second:
The formula used to calculate the flow rate in L/s is:
The pipe diameter is 50 mm.
Calculate the cross-sectional area of the pipe:
The velocity of the water is 1.5 meters per second.
Use the formula to find the flow rate:
| Flow Rate | Pipe Diameter | ||
|---|---|---|---|
| (L/s) | (GPM) | (mm) | (inches) |
| 0.17 | 2.64 | 15 | 0.59 |
| 0.33 | 5.28 | 20 | 0.79 |
| 0.50 | 7.93 | 25 | 0.98 |
| 0.67 | 10.57 | 32 | 1.26 |
| 0.83 | 13.21 | 40 | 1.57 |
| 1.00 | 15.85 | 50 | 1.97 |
| 1.17 | 18.49 | 65 | 2.56 |
| 1.33 | 21.13 | 80 | 3.15 |
| 1.50 | 23.78 | 100 | 3.94 |
| 1.67 | 26.42 | 125 | 4.92 |
| Application | Required Flow Rate (L/s) |
|---|---|
| Shower | 0.125-0.158 |
| Kitchen Sink | 0.095-0.127 |
| Bathroom Sink | 0.063-0.095 |
| Washing Machine | 0.190-0.315 |
| Dishwasher | 0.127-0.190 |
| Garden Hose | 0.315-0.632 |
| Lawn Sprinkler | 0.252-0.378 |
L/s (Liters per Second) is used to measure the flow rate of liquids, particularly water. It is commonly applied in plumbing, irrigation, industrial fluid systems, and HVAC applications to ensure proper flow and system efficiency.
To convert L/s to GPM (Gallons per Minute), multiply the L/s value by 15.85032. For example, 1 L/s is equivalent to approximately 15.85 GPM.
L/s is influenced by factors such as pipe diameter, liquid pressure, velocity, and system efficiency. Obstructions, bends, and pipe length can also impact the flow rate.
To calculate L/s for a pump, use the formula: L/s = (Pump Power × 1000) / (Total Head × 9.81 × 60). This determines the flow rate based on the pump's power and the height it needs to lift the liquid, adjusted for seconds.
A good L/s for a shower is typically between 0.125 and 0.158 L/s. This provides a balance between water conservation and a comfortable shower experience.