pyCalc

Calculator made in Python using tkinter
pyCalc3 uses Reverse Polish Notation

Functions

Basic calculator
Screen size calculator
Trigonometric function calculator
Number system converter
Temperature converter
Length converter
Currency converter
Time Converter
Speed Converter
Energy Converter
Area Converter
Weight and Mass Converter
Data Converter
Volume Converter
Power Converter
Pressure Converter
Angle Converter
Math formulas

Source

Code tested in Windows 10 with Python 3.6.6