# Determinant of a 2 by 2 Matrix - Calculator

An online calculator that calculates the determinant of a 2 by 2 matrix.

Let A be a 2 by 2 matrix given by

A = [[a , b] , [c , d]]

where [a , b] is the first row and [c , d] is the second row of the given matrix.

The determinant of matrix A is given by

det(A) = a*d - c*b

## How to Use the Calculator

1 - Enter coefficients a, b, c and d press "enter".

 row 1-1/3 , 2 row 20 , 4/5 Decimal Places = 5(Change to the number of decimals desired) Determinant= 0

### More References and links

Calculate Determinant of a Matrix
Math Calculators and Solvers.