Enter the reference evapotranspiration (mm/day) and the crop factor into the Calculator. The calculator will evaluate the Crop Water Use.

## Crop Water Use Formula

Etc = Eto * Kc

Variables:

- Etc is the Crop Water Use (mm/day)
- Eto is the reference evapotranspiration (mm/day)
- Kc is the crop factor

To calculate Crop Water Use, multiply the reference evapotranspiration by the crop factor.

## How to Calculate Crop Water Use?

The following steps outline how to calculate Crop Water Use.

- First, determine the reference evapotranspiration (mm/day).
- Next, determine the crop factor.
- Next, gather the formula from above = Etc = Eto * Kc.
- Finally, calculate the Crop Water Use.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

reference evapotranspiration (mm/day) = 284

crop factor = 113