Calculate water application rate, inches per hour, gallons per minute per acre, total gallons, acre-inches, runtime, and irrigation cost. Use this calculator for pivots, sprinklers, drip systems, and field irrigation planning.
Application rate:
Enter flow rate and field acres to estimate gross inches per hour and net inches per hour.
Runtime needed:
Enter target water depth to estimate how long the system should run.
Required flow rate:
Enter target depth and runtime to estimate the GPM needed to apply that water.
Application cost:
The calculator estimates water cost, energy cost, labor cost, setup cost, total cost, and cost per acre.
A water application rate calculator helps estimate how quickly an irrigation system applies water across a field.
It can help compare flow rate, acres, application depth, runtime, system efficiency, distribution uniformity, total gallons, and irrigation cost.
Your result shows estimated application rate, net application rate, GPM per acre, total gallons applied, acre-inches applied, water depth applied, runtime needed, required flow rate, and cost. These are estimates based on the values you enter.
Divide flow rate in gallons per minute by field acres to get GPM per acre. Then divide GPM per acre by 453 to estimate inches per hour.
About 18.9 GPM per acre equals one inch per day. One GPM per acre applies about 0.053 inches per day, before efficiency adjustments.
Multiply flow rate by runtime minutes to get gallons applied, divide by 27,154 to get acre-inches, then divide by field acres.
System efficiency estimates the share of pumped water that reaches the crop root zone. Lower efficiency reduces the net application rate.