Numbers Calculators

Choose a numbers tool

Convert numbers between decimal, binary, hexadecimal, octal, and Roman numerals.

• Decimal to Binary
• Decimal to Hex
• Decimal to Octal
• Decimal to Roman
• Binary to Decimal
• Binary to Hex
• Binary to Octal
• Binary to Roman
• Hex to Binary
• Hex to Decimal
• Hex to Octal
• Hex to Roman
• Octal to Binary
• Octal to Decimal
• Octal to Hex
• Octal to Roman
• Roman to Binary
• Roman to Decimal
• Roman to Hex
• Roman to Octal