What dice can I roll?

Enter any number of sides (e.g. 6 for d6, 20 for d20) and how many dice to roll.

Results use JavaScript Math.random(); suitable for games, not cryptographic use.

Can I roll multiple dice?

Yes. Set 'Number of dice' to 2 or more; the result shows each die and the total.

Roll one or more dice (e.g. d6, d20). Choose sides and count, see the result.

Sides per die

Number of dice

What dice can I roll?: Enter any number of sides (e.g. 6 for d6, 20 for d20) and how many dice to roll.
Is it fair?: Results use JavaScript Math.random(); suitable for games, not cryptographic use.
Can I roll multiple dice?: Yes. Set 'Number of dice' to 2 or more; the result shows each die and the total.

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.