Base 16 to base 10

Convert Hexadecimal to Decimal

Convert base 16 values to base 10. Integers remain exact even when they exceed JavaScript's ordinary safe-number limit.

Number From base

Result

42

To base

2A₁₆ = 42₁₀

Same value in common bases

Base	Value

Method

How to convert base 16 to base 10

Each hexadecimal digit is evaluated by its power of 16. The exact value is then repeatedly divided by 10 to produce the destination digits.

value₁₀ = sum(digit x 16^position)

For fractional digits, the converter keeps an exact rational numerator and denominator, then generates up to 32 destination digits. An ellipsis marks a repeating or longer expansion.

Examples

Hexadecimal to Decimal table

Hexadecimal (base 16)	Decimal (base 10)
1	1
2	2
A	10
2A	42
64	100
FF	255
400	1024

Continue converting

Decimal to HexadecimalReverse conversion Binary to decimalBase 2 to base 10 Decimal to hexadecimalBase 10 to base 16