Hex Definition The free online hex calculator will convert hexadecimals to decimals and convert decimals to hexadecimals. The decimal system is a numbering system that uses a 0-9 numbering scheme while the hexadecimal numbering system is a positional numbering system with a base (radix) of 16. Try out the free hexadecimal converter by entering in either a decimal number or a hexadecimal number to convert to the opposite type of number.

How to Calculate Hex Let's be honest - sometimes the best hex calculator is the one that is easy to use and doesn't require us to even know what the hex formula is in the first place! But if you want to know the exact formula for calculating hex then please check out the "Formula" box above.