Cost Calculator AI
Agriculture, Gardening & LandscapingWater Management

Irrigation Cost Calculator

Calculate agricultural and commercial landscape irrigation expenses, pumping energy, acre-foot water rates, and annual distribution costs.

Acreage, Water Depth & Energy Rates

Seasonal Irrigation Total$31,070Pumping energy & water fees
Cost Per Acre$239.00Seasonal expense per acre
Total Water Volume28.2M86.7 acre-feet delivered
Cost / Applied Inch$29.88Blended rate / acre-inch

Irrigation Water Volume & Energy Formula

Water Volume (Acre-Feet) = Acres × Application Inches / 12; Pumping Energy Cost = Volume × Energy Cost Per Acre-Foot; Total Irrigation Cost = Energy Cost + Water Supply Rights + Maintenance
  • Acre-Inch: Volume of water covering one acre one inch deep, equal to exactly 27,154 US gallons.
  • Acre-Foot: 12 acre-inches, equal to 325,851 US gallons.
  • Pumping Energy: Kilowatt-hours (kWh) of electric motor power or diesel gallons required to lift groundwater from well depth against system operating pressure (PSI).
  • Water District Rights: Annual canal assessments or metered groundwater replenishment fees.

Step-by-Step Worked Example

Scenario: Center pivot irrigating 130 acres of corn with 8 inches of groundwater at $28.00 pumping cost per acre-inch

Calculation Steps:

  1. Calculate total water depth volume: 130 acres × 8 inches = 1,040 acre-inches (86.67 acre-feet)
  2. Calculate pumping energy cost: 1,040 acre-inches × $28.00 = $29,120.00
  3. Calculate water district fee: 130 acres × $15.00 = $1,950.00
  4. Calculate total seasonal irrigation cost: $29,120.00 + $1,950.00 = $31,070.00
  5. Calculate cost per irrigated acre: $31,070.00 / 130 acres = $239.00 / acre
Result: Delivering 8 inches of water across the 130-acre pivot costs $31,070.00 seasonally ($239.00 per acre, or $29.88 per applied acre-inch).

How to Use This Calculator

  1. 1Enter total irrigated land area in acres.
  2. 2Input the seasonal target water application depth in inches (acre-inches).
  3. 3Enter pumping energy and pump maintenance cost per acre-inch (or per acre-foot).
  4. 4Add any water district rights or annual surface water canal fees.
  5. 5Review total seasonal water volume in gallons/acre-feet and total irrigation cost.

Assumptions & Limitations

  • Assumes 1 acre-inch equals 27,154 gallons.
  • Pumping efficiency varies based on static well water depth and system operating pressure.

Frequently Asked Questions

How many gallons are in an acre-foot of water?

One acre-foot of water equals exactly 325,851 US gallons (or 43,560 cubic feet), enough water to cover one acre of land to a depth of one foot.

What is the average cost to pump agricultural irrigation water?

Depending on well depth and energy source (electricity vs off-road diesel), pumping costs typically range from $4.00 to $12.00 per acre-inch for shallow wells (under 100 ft) to $25.00 to $50.00+ per acre-inch for deep aquifer pumping (300+ ft).

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