Irrigation Scheduling Calculator
Determine when and how much to irrigate based on evapotranspiration rate, current soil moisture, root depth, and soil water-holding capacity.
Inputs
in/day
% FC
in
in/ft
%
acres
Results
Days Until Irrigation
6.5 days
Water to Apply1.08 inches
Total Gallons Needed3,812,422 gal
Steady-State Interval10.8 days
Total Available Water in Root Zone5.4 in
How to Use This Calculator
- Enter the crop type and current growth stage.
- Set recent evapotranspiration (ET) rate from local weather station data.
- Input current soil moisture depletion percentage and field capacity.
- Review recommended irrigation amount in inches and next irrigation trigger date.
- Use outputs to program your pivot or drip irrigation controller schedule.
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