Is the range inclusive?

Yes. Both min and max can be drawn. For integers, min and max are included.

Yes. Enter decimal min/max to get a random decimal in that range.

Uses JavaScript Math.random(); suitable for games and simple use, not cryptographic.

Online Random Number Generator

Generate a random number within a specified range (min and max inclusive).

Min

Max

Integer only

Is the range inclusive?: Yes. Both min and max can be drawn. For integers, min and max are included.
Can I get decimals?: Yes. Enter decimal min/max to get a random decimal in that range.
How random is it?: Uses JavaScript Math.random(); suitable for games and simple use, not cryptographic.

Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Free temperature converter.

Tip Calculator

Calculate tip and split the bill. Enter bill amount, tip percentage, and number of people.

Roman Numeral Converter

Convert numbers to Roman numerals and Roman numerals to numbers. Supports 1–3999.

Combinations Calculator

Calculate C(n,r) — the number of ways to choose r items from n without order. Uses n!/(r!(n-r)!).

Combinations with Replacement Calculator

Calculate the number of ways to choose r items from n with repetition allowed. Formula: C(n+r-1, r).

Even Permutations Calculator

Count how many permutations of n objects are even (expressible as an even number of swaps). For n ≥ 2, equals n!/2.