Water Requirement
Irrigation Calculator
EN
HI
Crop Water Need — ETc
mm/day
inches/day
Evapotranspiration rate from weather data or crop coefficient tables.
Farm Area
Area Unit
Hectare (ha)
Acre (ac)
Sq. Metre (m²)
Sq. Feet (ft²)
Sq. Yard (yd²)
Sq. Kilometer (km²)
Sq. Mile (mi²)
Bigha (avg.)
Guntha
Katha (avg.)
Kanal
Marla
System Efficiency %
Drip ≈ 90% · Sprinkler ≈ 75% · Center Pivot ≈ 85% · Surface/Flood ≈ 55%
System Flow Rate (optional)
litres/hour
Calculate Requirement
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