Reference Evapotranspiration (ETo & ETc) Crop Water Demand Calculator
Calculate reference evapotranspiration (ETo mm/day), crop coefficient (Kc), actual crop water consumption (ETc = ETo * Kc), and daily hectare water demand in m³/day following FAO-56 standards.
Calculator Inputs
Live Real-TimeTotal Daily Farm Water Requirement (m³/day)
Actual Crop Evapotranspiration (ETc mm/day)
5.25 mm/day
Water Demand per Hectare (m³/ha/day)
52.5 m³/ha
Total Daily Water (Liters/day)
262,500 L/day
Precision Irrigation Scheduling: Calibrated FAO-56 evapotranspiration models optimize crop yield.
Evapotranspiration Metrics
Detailed Calculation Breakdown
Calculation Methodology
Crop Evapotranspiration: ETc = ETo * Kc. Daily Hectare Water Volume (m³/ha/day) = ETc (mm) * 10 (since 1 mm depth across 1 hectare = 10 m³).
Important Legal & Educational Disclaimer
This hydrological agronomy tool computes FAO-56 Penman-Monteith crop water requirements.
This calculator is designed for educational and informational purposes only based on public statutory frameworks. The outputs do not constitute binding financial, tax, or legal advice. We assume no liability for decisions made based on these estimations. Always verify with the relevant official authorities or a certified professional advisor.
Frequently Asked Questions
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