Excel Function Library

A comprehensive, searchable reference for Excel's most useful functions, connected directly to practical tutorials and deep dives from the article library.

Showing 22 of 22 functions

AVERAGE

Statistical

2026-03-14

Return the arithmetic mean of the numbers in a range or list of values.

Syntax

AVERAGE(number1, [number2], ...)
Used in 3 articlesView reference

COPILOT

AI & Productivity

2026-03-14

Use a natural-language prompt directly in a cell to generate or transform content with Excel Copilot.

Syntax

COPILOT(prompt, [value])
Used in 5 articlesView reference

DATE

Date & Time

2026-03-14

Build a valid Excel date from separate year, month, and day values.

Syntax

DATE(year, month, day)
Used in 5 articlesView reference

DATEDIF

Date & Time

2026-03-14

Calculate the difference between two dates in years, months, days, or combinations of them.

Syntax

DATEDIF(start_date, end_date, unit)
Used in 2 articlesView reference

HLOOKUP

Lookup & Reference

2026-03-14

Search across the top row of a table and return a value from a specified row underneath it.

Syntax

HLOOKUP(lookup_value, table_array, row_index_num, [range_lookup])
Used in 2 articlesView reference

IF

Logical

2026-03-14

Test a condition and return one result for TRUE and another for FALSE.

Syntax

IF(logical_test, value_if_true, [value_if_false])
Used in 5 articlesView reference

INDEX

Lookup & Reference

2026-03-14

Return a value from a range by row number, column number, or both.

Syntax

INDEX(array, row_num, [column_num])
Used in 10 articlesView reference

MATCH

Lookup & Reference

2026-03-14

Return the relative position of a value inside a row or column.

Syntax

MATCH(lookup_value, lookup_array, [match_type])
Used in 8 articlesView reference

MID

Text

2026-03-14

Return characters from the middle of a text string based on a start position and length.

Syntax

MID(text, start_num, num_chars)
Used in 3 articlesView reference

MOD

Math & Trig

2026-03-14

Return the remainder after a number is divided by a divisor.

Syntax

MOD(number, divisor)
Used in 5 articlesView reference

NOW

Date & Time

2026-03-14

Return the current date and time based on the workbook's latest recalculation.

Syntax

NOW()
Used in 4 articlesView reference

OFFSET

Lookup & Reference

2026-03-14

Return a reference shifted by a specified number of rows and columns from a starting point.

Syntax

OFFSET(reference, rows, cols, [height], [width])
Used in 4 articlesView reference

RIGHT

Text

2026-03-14

Return characters from the right end of a text string.

Syntax

RIGHT(text, [num_chars])
Used in 3 articlesView reference

SUM

Math & Trig

2026-03-14

Add numbers, cell references, and ranges together in a single formula.

Syntax

SUM(number1, [number2], ...)
Used in 6 articlesView reference

SUMIF

Math & Trig

2026-03-14

Add values that meet a single condition.

Syntax

SUMIF(range, criteria, [sum_range])
Used in 2 articlesView reference

SUMIFS

Math & Trig

2026-03-14

Add values that meet multiple conditions at the same time.

Syntax

SUMIFS(sum_range, criteria_range1, criteria1, [criteria_range2], [criteria2], ...)
Used in 10 articlesView reference

TEXT

Text

2026-03-14

Convert a value to text using a custom number, date, or time format.

Syntax

TEXT(value, format_text)
Used in 6 articlesView reference

TIME

Date & Time

2026-03-14

Build a valid Excel time value from hour, minute, and second components.

Syntax

TIME(hour, minute, second)
Used in 10 articlesView reference

TRIM

Text

2026-03-14

Remove extra spaces from text while leaving single spaces between words.

Syntax

TRIM(text)
Used in 8 articlesView reference

VALUE

Text

2026-03-14

Convert a text representation of a number, date, or time into a numeric Excel value.

Syntax

VALUE(text)
Used in 3 articlesView reference

VLOOKUP

Lookup & Reference

2026-03-14

Search for a value in the first column of a table and return a value from the same row.

Syntax

VLOOKUP(lookup_value, table_array, col_index_num, [range_lookup])
Used in 9 articlesView reference

WEEKDAY

Date & Time

2026-03-14

Return the day-of-week number for a valid Excel date.

Syntax

WEEKDAY(serial_number, [return_type])
Used in 2 articlesView reference