๐ฑ Gardening
Irrigation Calculator
Irrigation scheduling works backwards from the water requirement: convert the weekly inches into gallons for the area, then divide by the flow rate of the zone. Drip systems run far longer than sprinklers because they deliver water slowly and directly.
How it works
Irrigated area
Water need per week
System type
Zone flow rate
System efficiency
Sessions per week
Water needed per week
Water to pump (accounting for efficiency)
Minutes per session
System run time per week
Note
Frequently asked questions
How do I use the Irrigation Calculator?
Fill in the fields above โ the result recalculates instantly as you type. Everything runs in your browser, so the values you enter are never collected or stored.
Is this calculator free?
Yes. It is completely free, requires no account, and works on phones, tablets and desktops.