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Raster Calculator ArcGIS

The Raster Calculator executes a single Map Algebra expression, using Python syntax in a calculator-like interface.

Raster Calculator Tool

The Raster Calculator tool allows you to create and execute a Map Algebra expression that will output a raster. It can be used in ModelBuilder.

Open Raster Calculator tool in ArcMap, Open ArcToolbox, click Spatial Analyst Tools > Map Algebra> Raster Calculator.

ArcGIS Raster Calculator tool

How to use Raster Calculator in ArcGIS

Raster Calculator window in arcmap
  • The available rasters will be displayed in the Layers list.
  • If you have entered a function name, you can right-click it and select the Usage option to see the command usage.
  • Use the context help button Context help button for more information on each of the elements of the Raster Calculator interface.
  • For more information on Map Algebra expressions, click the About Building Expressions button.
  • Values and certain functions can be entered by their respective buttons. Additional functions like; Arithmetic, Trigonometric, Logarithmic, and Power are revealed by clicking the expand button Button to expand the list of function buttons.

The operators in the Raster Calculator tool

/(Division)==(Equal To)!=(Not Equal)&(Boolean And)
*(Multiplication)>(Greater Than)>=(Greater Than or Equal to)|(Boolean Or)
-(Subtraction)(Negate)<(Less Than)<=(Less Than or Equal to)^(Boolean XOr)
+(Addition)~(Boolean Not)

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