Skip to content
Google Sheets

ATAN function in Google Sheets

Returns the inverse tangent of a value, in radians.

=ATAN(value)

ATAN syntax and parameters

One argument, one required.

  • valuenumberRequired

    The value for which to calculate the inverse tangent.

ATAN examples

Formulas you'll actually reuse.

  1. The arctangent of 1, in radians:

    =ATAN(1)

    Result0.7854

  2. The same angle in degrees — wrap in DEGREES:

    =DEGREES(ATAN(1))

    Result45

ATAN in Excel

Same name — your formula ports as-is.

Try ATAN in the playground

Edit the example — nothing to install.

Preloaded with the ATAN formula from Example 1 — change anything and watch it respond.

Loading the editor…

Related functions

More ways Google Sheets gets this done.