## Variables

- Operate Flow rate: the capacity of flow water for valves opened at the same time.
- Operate Pressure: The requirement of pressure head at the pump outlet. This pressure equal to all the pressure head of the systems (pressure at the sprinkler (or dripper) + total pressure loss).

## Pump calculation formula

With the pump calculation formula below you can easily and quickly calculate pump capacity based on flow and pressure head. Pump calculator also regard to the real ability of the Motor and pump. In most case we apply about 75% of Pump Efficiency and about 80-90 of Drive Motor Efficiency.

## Pressure loss in pipeline

Pipeline pressure loss calculator is an important formula that helps you calculate and design your irrigation system accurately.

## RELATED CALCULATORS

**Pipeline pressure loss calculator**

Used to calculate the velocity of water in a pipe. Bigger pipe is more expensive, but keeping the water velocity low is important to limit pressure losses due to friction, water hammer, and pipe movement due to water momentum changes inside the pipe.

**Pipe size calculator**

This calculates the pressure or friction loss along a given length of pipeline with a specified inside diameter and flow rate.