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Calcimator

Garden Watering Calculator

Calculate weekly water needs for your garden based on size, temperature, rainfall, and soil type.

Inputs

sq ft
F
in

Results

Water Needed This Week

31.2 gal

≈ 6 buckets

Times per Week3
Minutes per Watering2.1 min
Annual Water Cost$6.49
Drought Risk (1=Yes, 0=No)0
How to Use This Calculator
  1. Enter your garden area in square feet and select the plant density (1=Sparse, 2=Normal, 3=Dense/intensive).
  2. Enter the average daytime temperature in °F and the total rainfall received this week in inches.
  3. Select your soil type: sandy soil drains quickly and requires more frequent watering; clay retains moisture longer.
  4. Review Water Needed This Week (gallons), the recommended watering frequency, and minutes per session.
  5. Use the Annual Water Cost estimate to budget your seasonal irrigation expense.

How the result changes with Average Temperature

Average TemperatureWater Needed This Week
4818.7 gal
6818.7 gal
9246.7 gal
11262.3 gal

What each input means

Garden Area
Total planted garden area in square feet.
Plant Density
1=Sparse, 2=Normal, 3=Dense/intensive.
Average Temperature
Average daytime temperature this week in Fahrenheit.
Rainfall This Week
Total rainfall received this week in inches.
Soil Type
1=Sandy (drains fast), 2=Loam (balanced), 3=Clay (retains water).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Garden Area = 100, Plant Density = 2, Average Temperature = 80, Rainfall This Week = 0.5 = 5 input(s) provided
  2. Calculate Water Needed This Week
    Water Needed This Week
    31.2 = 31.2
  3. Calculate Times per Week
    Times per Week
    3 = 3
  4. Calculate Minutes per Watering
    Minutes per Watering
    2.1 = 2.1

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