Garden Watering Schedule Calculator
Calculate weekly watering needs for your garden based on area, plant type, and local rainfall.
Weekly Watering Needed
125 gallons
Weekly Watering Needed vs Garden Area
Garden Watering Needs
Most gardens need 1-1.5 inches of water per week from irrigation and rainfall combined. The deficit must be made up with supplemental watering.
Formula
Deficit (inches) = Weekly Need - Rainfall
Gallons = Deficit (inches) x Area (sq ft) x 0.623
The factor 0.623 converts inches of water over square feet to gallons (1 inch over 1 sq ft = 0.623 gallons). Water deeply and less frequently to encourage deep root growth.
Example Calculation
A 200 sq ft garden needing 1.5 inches/week with 0.5 inches of rain.
- 01Deficit = 1.5 - 0.5 = 1.0 inch
- 02Gallons = 1.0 x 200 x 0.623 = 124.6 gallons per week
- 03At 1 GPM sprinkler: about 125 minutes of watering
Frequently Asked Questions
Learn More
How to Calculate a Tip - Complete Tipping Guide
Learn how to calculate a tip at restaurants, salons, and other services. Covers standard percentages, mental math shortcuts, and how to split the bill fairly.