Calculators
Irrigation Water Calculator
Calculate irrigation water volume in m³ and litres from field area and depth in mm.
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Version 1.0.0 · Last reviewed
Tool
Result
Live output from your inputs
Enter values and calculate to see results.
How it worksShow guideHide guide
Introduction
Estimate irrigation water volume from field area and application depth in millimetres.
Formula
Water volume is field area times irrigation depth (converted to consistent length units).
- A — Field area
- d — Irrigation depth
- V — Water volume
Step-by-step
- Enter field area and unit.
- Enter irrigation depth in millimetres.
- Read volume in cubic metres and litres.
Worked example
1 ha with 25 mm depth needs 250 m³ (250,000 L) of water.
Use cases
- Size pumps and tanks for a single irrigation
- Plan water budgets for a growing season event
- Convert mm of water to cubic metres and litres
Frequently asked questions
Does this include efficiency losses?
No. It is the net water depth on the field. Increase the result for conveyance or sprinkler losses.
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