Calculate your quantity
Estimate a water volume for a chosen area and period. This is not an irrigation schedule.
How this estimate works
Gallons = area × inches of water × 0.623 ÷ application efficiency as a fraction.
The arithmetic describes a planning volume or sketch. Local climate, plant needs, pressure, flow, rainfall, and equipment ratings determine actual irrigation design.
Before you order
- Check local weather and plant water needs.
- Confirm equipment pressure, flow, and manufacturer coverage.
- Check local water rules and the site drainage path.
Planning estimates can differ from delivered or installed quantities.
Reference
US EPA WaterSense: Water Budget Tool. Product specific rates and installation specifications take precedence over general defaults.