Calculators

Calculates the area of various common 2D shapes (square, rectangle, circle, triangle etc.).

Calculates the dot product (scalar product) of two vectors. The dot product of two vectors is a single number that represents the cosine of the angle between them, scaled by the product of their magnitudes.

Calculates the equation of a line perpendicular to a given line and passing through a specified point. The calculator determines the slope of the perpendicular line, and then uses the point-slope form to find the equation in slope-intercept form (y = mx + b).

Calculates the logarithm of a number to a specified base.

Converts numbers up to 3,999,999 into Roman numerals and provides a breakdown of the Roman numeral system.

Calculates the area of a circle given its radius or diameter.

Rounds a number to a specified number of decimal places or significant figures.

Converts a given number to its equivalent in millions.

This calculator converts any number into its equivalent representation in billions.

Calculates the angle of depression, which is the angle formed by a horizontal line and the line of sight to an object below the horizontal line.