What are the available tools to protect my sheet in excel or hide it?

Apply password under main manu Review>Protect Sheet option, Then right click on the sheet name and click on HIDE option of the drop down menu. 

from file > info > Protect workbook > Encrypt password

or from tab Review Protect worksheet

You can go to the uper6th tab in excel (Name Review) .. After then you can find the icon of Protect Sheet .. you can click it. and type password what you want.

thank you mr khan said and mr Abdul basit

I agree with all the previous answers.

You are able to protect formula's, and specific rows and columns.

You may hide columns or rows, and once the sheet is protected by "Sheet Structure", users will not be able to review hidden columns or formulas.

The more drop-down selections there are for users, the more accurate the data sheet and more consistent the data will be.

My personal favourite; hide formulas with in a specific cell and row; which you are unable to hide the entire row or column by using CUSTOM FORMAT  ;;

BUT the worksheet must be structure password protected, otherwise the cell will get over-written. 

You can hide an Excel sheet, but users can unhide it just as quickly. If you want a more securely hidden sheet, hide it in the Visual Basic Editor (VBE).Fortunately, the technique is simple for you -- and users won't suspect a thing.

**1** The traditional method for hiding a sheet:

1-Open a new workbook.

2-Click Sheet's tab to select it.

3-From the Format menu, choose Sheet.

3-From the resulting submenu, choose Hide. Excel hides Sheeet* and its tab

**2**hide it in the Visual Basic Editor

1- Switch to Excel's VBE (press [Alt]+[F11]).

2-In the Project Explorer, select the sheet you want to hide. 

3-In the Properties window, select2 - xl Sheet Very Hidden from the Visible property's drop-down list.

1. Select all content from the file

2. Change the text color as background of the file

3. Save this file

a .Select Review Tab Ribbon

    Choose: Protect Sheet or Protect Workbook ( use password protection.

b. Select Home Tab Ribbon in on each menu there is a small arrow pointing down right.. click and the format cell will popup on select Protection tab then uncheck Locked: then press ok..

select particular cells to lock then go to worksheet then right click then 

- protect sheet then put the password.. You formulas are protected .. but still you can use other cell for entering data.

U can give password to excel