How to convert int to double in Java?

December 1, 2021

To convert int to double in Java, just assign int to a double variable.

Assignment

Java implicitly converts int to double during assignment.

int myInt = 3;
double myDouble = myInt;

System.out.println(myDouble); // 3.0

You can also cast it in-place, if you don't want to make a new variable.

int myInt = 3;

System.out.println((double)myInt); // 3.0