Water Requirement Calculator
Estimate net field irrigation depth and volume from user-entered crop demand, effective rainfall, area, and application efficiency.
A QUICK WALKTHROUGH
How to use this tool
- Estimate net field irrigation depth and volume from user-entered crop demand, effective rainfall, area, and application efficiency.
Formula and scope
Net depth = max(0, demand − effective rainfall). Net volume m³ = depth mm × area ha × 10. Apply volume = net volume ÷ efficiency fraction. Demand and effective rainfall are user inputs.
Assumptions
Use consistent units and the same time period. Only entered values are included.
Local processing
Values stay in your browser. This is arithmetic, not professional advice.
GOOD TO KNOW
Common questions
Does this provide a recommendation?
No. It calculates only from your inputs.
Are inputs uploaded?
No. Processing stays local in your browser.