Appendix "systems of physical units" represents the 7 most common in engineering, construction and other industries coordinated systems of units: 5 metric, including international - SI 2 and Anglo-American.
Every coherent system of units is determined by three main physical units and derive from them.
Main body consists of two functional parts:
1. Comparison of these systems, which allows for the calculation of physical units to control the consistency and coherent transition from one system to another.
2. Calculator allows you to translate the numeric value of a physical quantity from one system to another.
The application also contains a "date calculator" which calculates the difference between two calendar dates in the format "years, months, weeks, days," (based on the number of days in months and leap years), as well as a full calendar days.