MS Excel: ACOSH Function (WS)

This Excel tutorial explains how to use the Excel ACOSH function with syntax and examples.


The Microsoft Excel ACOSH function returns the inverse hyperbolic cosine of a number.


The syntax for the Microsoft Excel ACOSH function is:

ACOSH( number )

Parameters or Arguments

number is a number greater than or equal to 1.

Applies To

The ACOSH function can be used in the following versions of Microsoft Excel:

  • Excel 2013, Excel 2011 for Mac, Excel 2010, Excel 2007, Excel 2003, Excel XP, Excel 2000

Type of Excel Function

The ACOSH function can be used in Microsoft Excel as the following type of function:

  • Worksheet function (WS)

Example (as Worksheet Function)

Let's look at some Excel ACOSH function examples and explore how to use the ACOSH function as a worksheet function in Microsoft Excel:

Microsoft Excel

Based on the spreadsheet above, the following Excel ACOSH examples would return:

Result: 0

Result: 0.96242365

Result: 2.633915794

Result: 3.725594657