Lawn Watering Schedule Calculator

Figure out exactly how long to run your sprinklers, how many gallons your lawn needs each week, and what it will cost on your water bill.

Lawn Area (sq ft)

Sprinkler Output (in/hr)

Number of Zones

Pricing (edit to match local rates)

Water Cost ($/1000 gal)

Gallons per Week

4,673

1.5" of water needed weekly

Minutes / Zone / Session

15 min

3 sessions/week across 4 zones

Monthly Water Cost

$101.16

20,232 gal/month

Purchase Option	Quantity	Est. Cost
Cool-Season	4,673 gal/wk	$101.16
Warm-Season	3,115 gal/wk	$67.44
Drought-TolerantBest value	2,336 gal/wk	$50.58

Estimated monthly cost: $101.16/moCool-season grasses (Kentucky bluegrass, fescue, ryegrass) need about 1.5" of water per week. Water deeply and less frequently — 3 sessions per week is ideal. Water early morning (6–10 AM) to minimize evaporation.

Consider water-saving upgradesAt over 20,000 gallons per month, smart irrigation controllers and rain sensors can reduce usage by 20–40%. A rain sensor alone ($25–50) prevents watering during and after rainfall.

This is an estimate for planning purposes. Actual water needs vary by climate, soil type, sun exposure, and season. Adjust watering during hot spells and rainy periods. Check local watering restrictions before setting your schedule.