> ## Documentation Index
> Fetch the complete documentation index at: https://waybeyond.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.
# GrowPilot: Evapotranspiration
> GrowPilot provides hourly and 7-day water demand forecasts for your crops.
## What is Evapotranspiration?
**Evapotranspiration (ETo)** (mm) is a weather-based estimate of the rate at which water leaves the soil (Evaporation) and a crop (Transpiration). It uses real-time weather data to calculate this value, including:
* Temperature
* Humidity
* Wind speed
* Solar radiation
This tells you how much water your crops are likely to need—not based on guesswork or habit, but on measurable climate demand.
ETo shows when conditions will dry soils and crops fasters, increasing the risk of water stress. It can be used to help determine irrigation timing, or combined with your crop coefficient (Kc) and variables such as rainfall to determine irrigation volumes.
## Where can I find my evapotranspiration forecasts in GrowPilot?
#### Home Dashboard
Today's ETo can be found on the Home dashboard (the bottom-left tab of the app).
Click the drop down on “Evapotranspiration (ETo)” to see more
#### Weather Forecast Dashboard
For more details on Evapotranspiration, go to the “Weather Forecast Dashboard” and scroll down. Toggle between Today, Tomorrow and Week tabs to view the ETo for each period.
