Drip Irrigation Water Usage

See how much water a drip irrigation zone applies over a week. Enter the number of emitters, their flow rate, and the runtime to understand weekly gallons delivered and per-session usage for scheduling and conservation planning.

Count of drip emitters or inline outlets.
Gallons per hour delivered by each emitter.
Minutes you run the zone each watering.
Optional. Defaults to 3 watering sessions per week.
Optional. Defaults to 0.90 to reflect minor losses.

Irrigation planning helper; verify against local watering guidelines and plant needs.

Examples

  • 40 emitters, 0.5 GPH, 45 minutes, 3 sessions, 0.9 efficiency ⇒ Weekly applied water: 40.50 gallons (153.31 L) | Per session: 15.00 gallons
  • 25 emitters, 0.8 GPH, 30 minutes, blank sessions, 0.85 efficiency ⇒ Weekly applied water: 25.50 gallons (96.53 L) | Per session: 10.00 gallons

FAQ

Can I estimate monthly usage?

Multiply the weekly gallons by roughly 4.3 to approximate a 30-day billing cycle.

What if my emitters have mixed flow rates?

Use the average flow per emitter or split calculations by emitter type and sum the results.

How do I convert from liters per hour?

Divide liters per hour by 3.78541 to obtain GPH before entering the value.

Additional Information

  • Gallons per session equal emitter count × flow rate × runtime (converted from minutes to hours).
  • Distribution efficiency captures losses to wind, evaporation, or uneven pressure so results reflect applied water.
  • Multiply weekly output by the number of zones to estimate whole-garden demand and align with watering restrictions.

Related calculators