ACOS Google Sheet Formula

Generate Google Sheet ACOS Formulas in seconds

Try Formula Generator View Examples

Interactive Formula Generator

Formula Generator

Create complex Google Sheets formulas with natural language. Simply describe what you want to calculate.

Upgrade to Sheet Alchemy Pro

Get advanced formulas, batch processing, and priority support

Upgrade Now

Input

Result

Your formula will be displayed here:

Your formula will appear here

Describe what you want to calculate and click Generate

Pro Features Available

Sheet Alchemy Pro includes additional advanced features to enhance your formula generation.

Advanced Formulas

Complex array formulas and dynamic ranges

Batch Processing

Generate multiple formulas at once

Unlimited History

Save and organize all your formulas

ACOS Formula Syntax

=ACOS(0.5)

Example Use Case

Finding the angle (in radians) from a cosine value for trigonometric calculations

Understanding the ACOS Formula

The ACOS function in Excel calculates the arccosine (inverse cosine) of a number, returning an angle in radians between 0 and π. It’s a key trigonometric tool when you have a cosine value and need the corresponding angle, such as in geometry or physics problems involving triangles or wave analysis.

Inputs must range from -1 to 1, matching the cosine function’s domain. For practical use, you might pair it with DEGREES to convert radians to degrees. It’s essentially the reverse of COS, unlocking angles from known ratios—perfect for design or engineering tasks.

Why Use ACOS?

ACOS is crucial for angular computations. Whether you’re determining the slope of a roof or analyzing oscillatory motion, it provides precise angle measurements from cosine data. Its reliability in technical fields makes it a must-know for advanced Excel users.

Example with Sample Data

Cosine	Formula	Result (radians)
0.5	=ACOS(0.5)	1.0472
1	=ACOS(1)	0
-1	=ACOS(-1)	3.1416

The table shows ACOS converting cosines to angles: 0.5 yields ~1.0472 radians (60°), while -1 gives π. It’s a clean solution for trigonometric reversals.