How to perform Matrix calculations in a scientific calculator! :D

Hello engineers,

Lets get started and learn how to perform the matrix calculations on a scientific calculator which we use in our engineering life!

NOTE: I assume that you are using CASIO fx-991 ES or above version!

Step1: Your calculator is generally preset to the COMPLEX mode to perform the mathematical operations.So the first step would be to change the mode of your calculator to MATRIX from COMPLEX mode or whatever mode your calculator is! 😛

To do this Select Mode which is on the top right corner of your calculator and select 6 to set your mode to MATRIX.

Step2:When you select 6; another menu with 3 options is displayed [This is generally for the naming convention for your matrix].It would be probably [MatA , MatB and MatC]. Now just press on button on your calculator.

Press Shift and press 4 ,this will trigger the [Matrix] mode and you will be shown a menu!

Select Dim from the menu by pressing 1 and select MatA.As soon as  you select the MatA, you will be displayed with another menu which shows you the dimensions of the matrix! Select the desired dimension you want by pressing the numbers which are assigned to them!

For simplicity lets press 1 to select 3×3.

Step3: Now input the values into the matrix by pressing the number followed by the “=” symbol. By doing this the value will be entered into the specified row or column! Lets enter all the one’s for understandability!

Now we need to store the value! To store the value press Shift which is on the left corner and then press RCL [STO].This triggers the STO which is short for Store and followed by destination which will be (-) for A.

Step4: To check whether the data is stored in the MatA location : follow these steps!

Press AC ,then press Shift and press 4 to select [Matrix]  which will display another menu! Now from this menu select DATA by pressing 2. Now select the MatA by pressing 1 which will show you the value stored in the Matrix A.It should display the matrix with all one’s in it [as we have entered all one’s while giving input].

Step5: Now again press AC and Similarly as the above steps select the MatB and select 3×3 ;Enter the values and store it as mentioned above!But this time when you are storing MatB you need to give the destination as ” 0,,, “ which is exactly beside (-) on the calculator.Check whether the MatB is stored properly by following step4 🙂 !

Note that the destination for the MatC is “hyp”.

Step6: Now its time to perform the operations! Lets multiply:

Press AC:

Now press Shift 4 which triggers [Matrix] and then select MatA by pressing 3 . Now you will see the MatA on the console.

Now give any operator ; In this case lets give “x” and then again press Shift 4 which triggers [Matrix] and then select MatB by pressing 4. Now you will see MatB on the console. So to the whole you will see MatA X MatB  on the console!

Now what are you waiting for press the magic key “=”. This will display you the answer ! 😀


Always check whether the values are stored in proper destination or the calculator will flash an error “Dimension Error”!

Perform the operations on the matrices and have fun!

Save time in your exams by using the calculator! 😀 😛



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