Random Number Generator

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Random Number Generator is a free online tool that can create one or more random numbers within a specified range or distribution.


A random number is a number that is chosen by chance and cannot be predicted. Random numbers are often used for games, simulations, cryptography and statistics. There are different ways to generate random numbers, such as using dice, coins, cards or machines. Some methods are more random than others, depending on the source of randomness and the algorithm used.

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Distance calculator could calculate the distance between two points in the rectangular coordinate system, supports two-dimensional coordinates and three-dimensional coordinates.

Distance Calculator

Distance calculator could calculate the distance between two points in the rectangular coordinate system, supports two-dimensional coordinates and three-dimensional coordinates.
Base Converter supports arbitrary conversions between 2 and 36 bases, and also supports floating-point types conversion.

Base Converter

Base Converter supports arbitrary conversions between 2 and 36 bases, and also supports floating-point types conversion.
Twin Calculators (Twofold Calculators), which combines two calculators into one, and the calculation result can be copied and pasted between the two calculators with one click.

Twin Calculators

Twin Calculators (Twofold Calculators), which combines two calculators into one, and the calculation result can be copied and pasted between the two calculators with one click.
Perimeter Calculator supports perimeter calculations for common geometric figures such as Circular, Sector, Ellipse, Triangle, Square, Rectangle, and Parallelogram.  You can use different formulas and methods to calculate the perimeter of these geometric figures depending on the shape and the given information.

Perimeter Calculator

Perimeter Calculator supports perimeter calculations for common geometric figures such as Circular, Sector, Ellipse, Triangle, Square, Rectangle, and Parallelogram. You can use different formulas and methods to calculate the perimeter of these geometric figures depending on the shape and the given information.