Depending on whether you need a ready-to-use application or source code for a project, here are the most reliable options:
Choose a tool like jscicalc-2.0.4.jar .
A long-standing, high-precision scientific calculator for Java. It evaluates commands using the standard order of operations and includes a programmer mode for base conversions. You can download the latest stable .jar file from SourceForge . download scientific calculator for java