10 most useful Excel formulas
10 most useful Excel formulas
 SUM: This formula adds up a range of cells. To add the values in cells A1 through A5, for example, use the formula =SUM(A1:A5).

AVERAGE: This formula calculates the average of a range of cells. To calculate the average of the values in cells A1 through A5, for example, use the formula =AVERAGE(A1:A5).

If: This formula allows you to perform different actions based on whether a condition is true or false. For example, you can use the formula
=IF(A1>B1, "A is greater","B is greater")
to compare the values in cells A1 and B1 and display a message depending on which value is greater. 
VLOOKUP: This formula searches for a value in a table and returns a corresponding value from a different column in the same row. For example, you can use the formula
=VLOOKUP(A1,B1:C5,2,FALSE)
to search for the value in cell A1 in the range B1:C5 and return the value from the second column (C) in the same row. 
COUNT: This formula counts the number of cells that contain numbers within a range. To count the number of cells containing numbers in the range A1:A5, for example, use the formula =COUNT(A1:A5).

MAX: This formula returns the maximum value in a range of cells. To find the maximum value in cells A1 through A5, for example, use the formula =MAX(A1:A5).

MIN: This formula returns the minimum value in a range of cells. To find the minimum value in cells A1 through A5, for example, use the formula =MIN(A1:A5).

Today: This formula returns the current date. You can use it to insert the current date into a cell, or you can use it in calculations. For example, you can use the formula
=TODAY()+7
to add 7 days to the current date. 
NETWORKDAYS: This formula calculates the number of workdays between two dates, excluding weekends and any holidays that you specify. To calculate the number of workdays between the dates in cells A1 and B1, for example, enter =NETWORKDAYS(A1,B1).

INDEX: This formula returns a value or reference to a value from within a table or range. For example, you can use the formula
=INDEX(A1:C3,2,3)
to return the value in the second row and third column (C2) of the range A1:C3.
I hope these formulas are helpful! Let me know if you have any questions about how to use them or if you would like to know more about any other Excel formulas.
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