 World's simplest math tool

Free online matrix adder. Just enter your matrices on the left and you'll automatically get a sum of all matrices on the right. There are no ads, popups or nonsense – just a matrix addition calculator. Created by mathematicians for mathematicians.
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Input Matrix Options
Separator of the input matrix columns. (Space by default.)
Separator of the input matrix rows. (Newline by default.)
Output Matrix Options
Separator of columns of the output sum matrix. (Space by default.)
Separator of rows of the output sum matrix. (Newline by default.)
Matrix Prettification
Beautify matrix by vertrically aligning its columns.
This tool adds matrices. The matrix sum is calculated by adding the corresponding elements of two matrices. The matrices should have the same number of rows and columns and as the result you get a matrix of the same size as input matrices. When you enter matrices, you can separate them using a pipe, if they're entering them horizontally or a plus, if you're entering them vertically. You can add several matrices using different separators. You can also select the separator between the elements and rows for the initial matrices and their result. If the result isn't very readable, you can beautify it by enabling beautify output matrix option, which will even out matrix elements by adding spaces between the numbers. Mathabulous!
Matrix addition examples Click to use
Add Two Square Matrices of Order Two
This example adds two matrices of second order, two-by-two matrices.
10 20 30 40 + 1 2 3 4
11 22 33 44
Required options
These options will be used automatically if you select this example.
Separator of the input matrix columns. (Space by default.)
Separator of the input matrix rows. (Newline by default.)
Separator of columns of the output sum matrix. (Space by default.)
Separator of rows of the output sum matrix. (Newline by default.)
Calculate the Sum of 2x3 Matrices
This example finds the sum of three two-by-three rectangular matrices with fractional coefficients. It also sets beautify mode on that makes the result matrix columns more readable.
0.6 0.2 0.8 0.1 0.7 0.3 + 0.4 1.8 2.2 0.9 1.3 2.7 + 0.1 0.2222 0.3 0.4 0.5 0.6
1.1 2.2222 3.3 1.4 2.5 3.6
Required options
These options will be used automatically if you select this example.
Separator of the input matrix columns. (Space by default.)
Separator of the input matrix rows. (Newline by default.)
Separator of columns of the output sum matrix. (Space by default.)
Separator of rows of the output sum matrix. (Newline by default.)
Beautify matrix by vertrically aligning its columns.
Find the Sum of the Four Matrices
This example adds four matrices using different matrix separators. The first two and the last two are separated by a pipe character and between them is a plus character.
1 1 1 | -6 -6 -6 1 1 1 | -6 -6 -6 1 1 1 | -6 -6 -6 + 3 3 3 | 2 2 2 3 3 3 | 2 2 2 3 3 3 | 2 2 2
0 0 0 0 0 0 0 0 0
Required options
These options will be used automatically if you select this example.
Separator of the input matrix columns. (Space by default.)
Separator of the input matrix rows. (Newline by default.)
Separator of columns of the output sum matrix. (Space by default.)
Separator of rows of the output sum matrix. (Newline by default.)
Beautify matrix by vertrically aligning its columns.
Pro tips Master online math tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
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Quickly generate a list of Tribonacci words.
Quickly generate a list of Lucas numbers.
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Quickly create a list of excessive numbers.
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Quickly create a list of slightly defective numbers.
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Quickly generate a list of even numbers.
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Quickly check if the given number is a Fibonacci number
Quickly generate π constant's digits to arbitrary precision.
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Quickly find the sum of two or more matrices.
Find the difference of two or more matrices.
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Quickly draw a Hilbert space-filling curve.
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Quickly draw a Sierpinski square fractal.
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Quickly draw a Sierpinski hexaflake fractal.
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Quickly draw an asymmetric Cantor set fractal.
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Quickly draw a Cantor dust fractal.
Quickly draw a Pythagoras tree fractal.
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Quickly draw an H-tree fractal.
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Find n-th e Digit
Calculate the n-th digit of Euler's number.
Find n-th Golden Ratio Digit
Calculate the n-th digit of Golden Ratio.
Find n-th Pi Digit
Calculate the n-th digit of pi constant.
Decode a Look-and-say Sequence
Perform the inverse operation on a look-and-say sequence.
Generate Stanley Number Sequence
Create a list of Stanley numbers.
Generate Bell Number Sequence
Create a list of Bell numbers.
Generate Carmichael Number Sequence
Create a list of Charmichel numbers.
Generate Catalan Number Sequence
Create a list of Catalan numbers.
Generate Composite Number Sequence
Create a list of composite numbers.
Generate Secant Number Sequence
Create a list of secant numbers.
Generate Golomb Number Sequence
Create a list of Golomb-Silverman numbers.
Generate Euler's Totient Number Sequence
Create a list of Euler's phi numbers.
Generate Juggler Number Sequence
Create a list of juggler numbers.
Generate Lucky Number Sequence
Create a list of lucky numbers.
Generate Motzkin Number Sequence
Create a list of motzkin numbers.
Create a list of Padovan numbers.
Generate Pseudoperfect Number Sequence
Create a list of semiperfect numbers.
Generate Ulam Number Sequence
Create a list of Ulam numbers.
Generate Weird Number Sequence
Create a list of weird numbers.
Generate Superperfect Number Sequence
Create a list of superperfect numbers.
Partition a Number
Find all partitions of the given integer.
Generate Partition Number Sequence
Create a list of Partition function numbers.
Generate Arithmetic Progression
Create an arithmetic sequence of numbers.
Generate Geometric Progression
Create a geometric sequence of numbers.
Generate Natural Number Sequence
Create a list of natural numbers.
Generate Powers of Two
Create a list of numbers of powers of two.
Generate Powers of Ten
Create a list of numbers of powers of ten.
Multiply a Matrix by a Scalar
Multiply all matrix elements by a number.
Check if a Matrix is Singular
Determine if a matrix is degenerate.
Find the Co-factor Matrix
Given a matrix, find its cofactor matrix.
Given a matrix, find its adjunct.
LU Factor a Matrix
Decompose a matrix into LU factors.
Find Matrix Eigenvalues
Find eigenvalues of a matrix.
Prettify a Matrix
Beautify a matrix by neatly aligning all its columns.
Reformat a Matrix
Convert matrix in one format to another format.
Draw a Fibonacci Spiral
Generate a Fibonacci spiral curve.
Draw Fibonacci Rectangles
Generate a drawing of Fibonacci rectangles.
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Draw a Mandelbrot Fractal
Generate a Mandelbrot fractal.
Draw a Julia Fractal
Generate a Julia fractal.
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Generate a Rauzy fractal.
Draw Blancmange Fractal Curve
Generate a Blancmange fractal.
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Generate a Weierstrass fractal.
Draw Minkowski Question-mark Curve
Generate a Minkowski Question-mark fractal.
Draw Thomae's Function
Generate a Thomae's function (also known as popcorn or raindrop function).
Draw Dirichlet's Function
Generate a Dirichlet's function.
Convert Words to Numbers
Convert numbers as English text to actual digits.
Convert Numbers to Words
Convert numbers to written English text.
Convert Decimal Notation to Scientific Notation
Convert numbers written in decimal form to scientific form.
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Convert numbers written in scientific form to decimal form.
Round Numbers Up
Apply ceil operation to numbers.
Round Numbers Down
Apply floor operation to numbers.