Java Convert Number of Days to Nanoseconds

Tags: Java Duration Java 8

In this Java core tutorial, we learn how to convert a number of days value to number of nanoseconds using the java.time.Duration class in Java programming language.

How to convert number of days to nanoseconds in Java

In Java, with a given number of days we can use the Duration.toNanos() method to convert it to number of nanoseconds value as the following Java code.

ConvertDaysToNanosecondsExample.java 

import java.time.Duration;

public class ConvertDaysToNanosecondsExample {
    public static void main(String... args) {
        long numberOfDays = 5;

        // Convert Number of Days to Nanoseconds
        long numberOfNanoseconds = Duration.ofDays(numberOfDays).toNanos();

        System.out.println("Number of days: " + numberOfDays);
        System.out.println("Number of nanoseconds: " + numberOfNanoseconds);
    }
}
The output as below. 
Number of days: 5
Number of nanoseconds: 432000000000000

Happy Coding 😊

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