Crop Water Budget Calculator
Crop Water Budget Calculator
Convert entered ETo, crop factor, effective rain and irrigation efficiency to litres.
Crop water demand starts with entered weather and crop factors, then rain offsets part of the requirement.
Supply ETo, crop factor and effective rainfall on matching units. Apply efficiency to compare irrigation litres.
How to use Crop Water Budget Calculator
- Enter reference ET per day, entered crop coefficient, days in period and effective rain across period.
- Enter garden area and application efficiency.
- Select Calculate result. Read the returned values alongside the assumptions below before copying, exporting or acting on the result.
Why choose this tool?
The staged calculation separates crop demand from the larger water amount needed after application losses.
Before you use the result
ETc equals ETo × Kc. ETo and Kc are entered values, not weather forecasts; effective rain is already net of losses.
Questions about Crop Water Budget Calculator
Is rainfall fetched automatically?
No. Enter suitable values for the period and site. Effective rain should already account for its relevant losses.
What should I check before using Crop Water Budget Calculator?
Check Reference ET per day, Entered crop coefficient, Days in period and Effective rain across period. Use the exact units shown beside the controls and replace any example values with your own inputs.
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