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Garden Watering

Work out how much water a garden needs each week.

About Garden Watering

The recommended inches of water per week over the garden's area converts to gallons, then to a monthly water cost. Most plants thrive on a steady weekly inch of water, so estimating volume prevents both underwatering and wasted water.

Formula

Garden Watering

Gallons = area sq ft x inches x 0.623 (an inch of water over a sq ft)

0.623
Gallons of water in one inch over one square foot

Worked example

With the default values below, Garden Watering returns Gallons per Week of 311.5. Change any input above and every figure here is recalculated in your browser.

Inputs used

Garden areaminimum 0 sq ft
500 sq ft
Water per weekminimum 0 in
1 in
Water priceminimum 0
0.004

Results

Gallons per Week
311.5 gal
Gallons per Month
1,353 gal
Monthly Cost
$5.41

Step by step

  1. 1Values used
  2. 2Garden Watering
  3. 3Gallons per Week= 311.5 gal
  4. 4Gallons per Month= 1,353 gal
  5. 5Monthly Cost= 5.41

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Garden Watering calculated?

Gallons = area sq ft x inches x 0.623 (an inch of water over a sq ft) The recommended inches of water per week over the garden's area converts to gallons, then to a monthly water cost.

Why does Garden Watering matter?

Most plants thrive on a steady weekly inch of water, so estimating volume prevents both underwatering and wasted water.

What values do I need to enter?

This calculator takes 3 inputs: Garden area, Water per week, Water price. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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Garden Watering – Calculate Gallons per Week | Calcrivo