Calculators

Converts between ten different angle measurement units.

This calculator converts between years and decades. A decade is a period of 10 years.

Calculates the number of combinations (binomial coefficient) of choosing k items from a set of n items.

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

This calculator demonstrates the behavior of floating-point numbers in calculations and highlights potential precision issues due to the way computers store and manipulate these numbers. It allows you to input two numbers and an operation, then displays the result and the difference between the calculated result and a more precise value.

Calculates the volume, surface area, or diameter of a sphere given its radius.

Calculates odds and probabilities, converting between the two and determining odds from event counts.

Calculates the number of combinations (nCr) - the number of ways to choose k items from a set of n items, where order doesn't matter.

Calculates the probability that at least two people in a group share the same birthday.

Calculates volume, total surface area, lateral surface area, or base area of a cylinder.