To split a text string at a certain character, you can use a combination of the LEFT, RIGHT, LEN, and FIND functions.
In the example shown, the formula in C5 is:
=LEFT(B5,FIND("_",B5)-1)
And the formula in...

This formula looks at one way to increment a number that is embedded in a text string. The purpose of this example to show how multiple functions can be combined to split, manipulate, and rejoin values.
In the example...

If you have worksheet that contains text dimensions (i.e. "50 ft x 200 ft" etc.) you can split the into two parts with formulas that use several text functions.
Background
A common annoyance with data is that it may...

To convert text in an unrecognized date format to a proper Excel date, you can parse the text and assemble a proper date with a formula based on several functions: DATE, LEFT, MID, and RIGHT. In the example shown, the...

To convert simple text values to numbers, you can use the the VALUE function, or simply add zero as described below. In the example shown, the formula in C5 is:
=VALUE(B5)
Background
Sometimes Excel ends up with...

Note: these is an experimental formula that uses a hard coded array constant, set down here for reference and comment. Casually tested only, so take care if you use or adapt.
Sometimes you encounter data that mixes...

To separate text and numbers, you can use a formula based on the FIND function, the MIN function, and the LEN function with the LEFT or RIGHT function, depending on whether you want to extract the text or the number. In...

To extract the page, or the part of a path after the last forward slash (/), you can use a formula based on several Excel functions: TRIM, RIGHT, SUBSTITUTE, and REPT. In the example shown, the formula in C5 is:
=TRIM...

To get a real date from day number, or "nth day of year" you can use the DATE function.
In the example shown, the formula in C5 is:
=DATE(2015,1,B5)
How this formula works
The DATE function build dates from...

Note: Excel contains many built-in rules for highlighting values with conditional formatting, including a rule to highlight cells that end with specific text. However, if you want more flexibility, you can use your own...

To remove the first character in a cell, you can use the REPLACE function. In the example shown, the formula in D5 is:
=REPLACE(A1,1,1,"")
How this formula works
This formula uses the REPLACE function to...

To extract the top level domain (called "TLD") from a list of domain names or email addresses, you can use a rather complex formula that uses several functions. In the generic form of the formula (above), domain...

To get the last word from a text string, you can use a formula based on the TRIM, SUBSTITUTE, RIGHT, and REPT functions.
In the example shown, the formula in C5 is:
=TRIM(RIGHT(SUBSTITUTE(B5,CHAR(10),REPT("...

If you need extract the last name from a full name, you can do so with this rather complex formula that uses several functions. In the generic form of the formula (above), name is a full name, with a space separating...

To convert dates in text format dd/mm/yy to a true date in mm/dd/yy format, you can use uses a formula based on the DATE function. In the example shown, the formula in C5 is:
=DATE(RIGHT(B5,2)+2000,MID(B5,4,2),LEFT(B5...