Estimate how long to run sprinklers, drip irrigation, soaker hoses, garden hoses, or irrigation zones. Calculate run time from garden area, watering depth, rainfall, gallons needed, flow rate, application rate, irrigation efficiency, and watering sessions.
Area and flow mode:
The calculator estimates gallons needed from area and water depth, then divides by flow rate to estimate run time.
Known gallons mode:
The calculator divides your known gallons needed by your flow rate to estimate watering time.
Application rate mode:
The calculator divides adjusted water depth by application rate to estimate sprinkler or irrigation run time.
Zone run time mode:
The calculator estimates gallons and run time per zone using zone count and flow per zone.
An irrigation run time calculator helps estimate how long to water a garden, lawn area, raised bed, drip zone, sprinkler zone, or soaker hose setup.
It can help reduce overwatering, underwatering, wasted water, unclear timer settings, inconsistent zones, and poor watering schedules.
Your result shows run time per watering session, weekly run time, gallons per session, weekly gallons, monthly gallons, estimated monthly water cost, adjusted water depth, rainfall offset, and zone-based irrigation details.
Estimate the gallons needed per watering session, then divide by your irrigation flow rate in gallons per minute. The result is run time in minutes.
Divide the water depth needed in inches by the sprinkler application rate in inches per hour. Convert hours to minutes for timer settings.
One inch of water over one square foot is about 0.623 gallons.
Yes. Rainfall should be subtracted from the target water depth before calculating irrigation gallons or run time.
No. This is an estimate. Actual run time can vary by water pressure, nozzle type, emitter flow, slope, wind, overlap, soil, weather, irrigation layout, and system efficiency.