The Time Duration Calculator is a powerful and user-friendly tool that helps you calculate the exact time difference between two given points. Whether you enter full date and time or only hours and minutes, the calculator automatically computes the duration in days, hours, minutes, and seconds. It also supports overnight shifts, provides results in a human-friendly format, and generates ISO duration values for professional use. With options to copy results, export them to CSV, and add custom labels or notes, this calculator is ideal for professionals, students, project managers, and anyone who needs accurate time tracking in daily life.