Garden watering calculator
PROWeekly gallons of water for your beds or lawn.
Short answer: gal = area × inches × 0.623. 500 sq ft × 1" = 311.5 gal / week ≈ 44.5 gal / day. Enter your measurements above and the garden watering calculator returns the quantity, unit conversions and an estimated cost instantly, in imperial or metric — no sign-up needed.
What do you need to measure?
What is the answer?
Gallons per week
312
Gallons per day
45
Minutes @ 5 gpm
63
How does the garden watering calculator work?
gal = area × inches × 0.623.
What does a worked example look like?
500 sq ft × 1" = 311.5 gal / week ≈ 44.5 gal / day.
What do people ask most?
›How much water do plants need?
Most vegetables and lawns need ~1 inch of water per week.
Which garden calculator should you use next?
Where can you learn more?
Read field notes on estimating and materials, or browse every calculator we make.
What should you read before you order materials?
Field notes from real jobs that explain the numbers behind this calculator.
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