Annulus Calculator Pro helps you to quickly and easily calculate different parameters of the ring shaped object. Automatic & accurate calculations. Key Features: • 15 types of calculations/inputs to choose from. • Calculated values and results can be shared to social media, mail, messages and other sharing apps. • Automatic calculation of values based on inputs. • Clear display of formulas. • Specific unit options are provided. • Professional user interface. • Available in English, Français, Español, Italiano, Deutsch, Português & Nederlands.