If you are looking for more advanced features you can upgrade to one or more of the following: - Stairs Calculations - Rafters Calculations - Work in and convert between all building dimensional formats: feet-inch-fractions, inch fraction, yards, decimal feet (10th, 100th), decimal inches and metric (km, m, cm, mm) - Multiple themes to choose from Enjoy the FREE Fraction calculator with, no ads, no prompts & if you like it, support us by upgrading or giving us a positive review. Thanks :)