Drip Irrigation Emitter Calculator
Estimate drip emitters, system flow, water per cycle, weekly use, package quantity and emitter cost for equal rows.
Default project preview
140 emitters
System flow
70 gal/h
Water per cycle
58.3 gal
Weekly water use
175 gal
Total dripline length
200 ft
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Irrigation rows
Enter this project assumption in a unitless value. The current imperial default is 4. Minimum: 1.
Length per row
Enter this project assumption in ft. The current imperial default is 50 ft.
Emitter spacing
Enter this project assumption in ft. The current imperial default is 1.5 ft.
Flow per emitter
Enter this project assumption in gal/h. The current imperial default is 0.5 gal/h.
Runtime per cycle
Enter this project assumption in minutes. The current imperial default is 45 minutes. Minimum: 1.
Watering days per week
Enter this project assumption in days. The current imperial default is 3 days. Minimum: 1. Maximum: 7.
Application efficiency
Enter this project assumption in %. The current imperial default is 90 %. Minimum: 1. Maximum: 100.
Emitters per package
Enter this project assumption in a unitless value. The current imperial default is 50. Minimum: 1.
Price per package
Enter this project assumption in a unitless value. The current imperial default is 18. Minimum: 0.
How to read the outputs
System flow
all emitters operating. Default preview: 70 gal/h.
Water per cycle
efficiency adjusted. Default preview: 58.3 gal.
Weekly water use
3 cycles per week. Default preview: 175 gal.
Total dripline length
equal rows. Default preview: 200 ft.
Emitter packages
rounded full packages. Default preview: 3.
Emitter cost
emitters only. Default preview: $54.00.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Emitters per row = round up(row length ÷ spacing) + 1. Flow and water use multiply by emitter count and runtime.
Related tools
Continue planning the project
FAQ
Drip Irrigation Emitter Calculator questions
Why add one emitter after dividing by spacing?+
It represents emitters at both ends of a row.
Can all rows run in one zone?+
Only when available pressure and flow support the total demand.
Does this determine watering frequency?+
No. Frequency depends on plants, soil and weather.