Garden & outdoors
Irrigation runtime calculator
Calculate the time needed to deliver a chosen water volume.
A clear answer. Here’s how.
Delivered litres = area in m² × water depth in mm. Runtime = litres ÷ measured total flow. Assumes uniform delivery and constant flow. The entered depth is your plan, not a watering recommendation; runoff, evaporation and plant needs are not modelled.
See a worked example
Worked example
A fixed demonstration, separate from the values you enter above.
- Watered area (m²)
- 20
- Desired delivered water depth (mm)
- 5
- Measured total flow (litres/minute)
- 8
Example result
- Water to deliver
- 100 litres
- Runtime (minutes)
- 12.5
- Runtime (hours)
- 0.208333333333