Calculatori is an online resource offering practical calculators, converters, reference materials, and educational articles. Its catalog brings together tools for everyday calculations and learning, with an emphasis on clear, intuitive use. Visitors can explore mathematical calculators for operations such as long addition, subtraction, multiplication, and division, as well as percentage calculations, a basic calculator, greatest common divisor and least common multiple, and factorization.

The site also provides tools for working with fractions, including fraction calculations and comparisons, and a geometry calculator for finding the area of a right triangle. Other offerings include date calculations, such as counting days, and computing tools for information technology, including number-system conversions and a megabit-to-megabyte converter. Alongside its calculators, the site features tables, formulas, and reference content, including geometry formulas and number theory topics.

The interface supports Russian and English and offers light, dark, and system display themes. Calculatori aims to make online calculations accessible and useful across a range of subjects and practical needs