How long does it take to obtain one half inch water in a lawn?

The time it takes to obtain half an inch of water on a lawn depends on the irrigation method and water pressure. Generally, using a standard sprinkler system, it can take anywhere from 30 minutes to 1 hour to deliver half an inch of water, depending on the sprinkler's flow rate. For more precise measurements, you can place a few containers around the lawn to gauge the actual water delivery rate.