Drip Irrigation Calculator

A 20×6 ft bed with rows 1.5 ft apart needs 4 drip lines, about 88 ft of tubing (with a 10% margin), and 84 emitters — enter your bed size and spacing to get a full parts list.

Bed length (ft)

Bed width (ft)

Row spacing (ft)

Emitter spacing (in)

Mainline run to zone (ft)

Waste margin (%)

Drip lines

Tubing

88 ft

Emitters

Drip line tubing
88 ft
per ft for Drip line tubing
Mainline tubing
11 ft
per ft for Mainline tubing
Drip emitters
84 pcs
per pc for Drip emitters
Tee connectors
4 pcs
per pc for Tee connectors
End caps
4 pcs
per pc for End caps

Enter your local prices to see an estimated cost.

How we calculate this

Drip lines = bed width ÷ row spacing, rounded up. Tubing length = number of lines × bed length, plus your waste margin. Emitters per line = bed length (in inches) ÷ emitter spacing, plus one for the start, multiplied by the number of lines. Each line gets one tee connector and one end cap.

Estimates only. Check local codes and product labels. Read our full disclaimer.