Free online tools to generate, sort, filter, and convert numbers — base conversion, Roman numerals, and more.
Create a list of numbers with custom start, end, and step values
Filter a list of numbers based on various criteria
Sort a list of numbers in ascending or descending order
Find the minimum and maximum values in a list of numbers
Calculate the average (mean) of a list of numbers
Convert numbers between decimal, binary, octal, and hex
Convert between Roman numerals and decimal numbers
Convert between binary and other number formats
Convert between hexadecimal and other number formats
Whether you need to generate a list of numbers, convert between bases, translate Roman numerals, or filter and sort data, these tools give you accurate answers in seconds. Every calculator runs directly in your browser — nothing to install, no account to create, and no data ever leaves your device.