how to convert hex to int in golang?

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To convert hex to int in golang, use the strings.Replace() and strconv.ParseInt() method it will convert your hex value to integer.

The strings.Replace() use for Replace returns a copy of the string s with the first n non-overlapping instances of old replaced by new. If old is empty, it matches at the beginning of the string and after each UTF-8 sequence, yielding up to k+1 replacements for a k-rune string. If n < 0, there is no limit on the number of replacements.

The strconv.ParseInt() interprets a string s in the given base (0, 2 to 36) and bit size (0 to 64) and returns the corresponding value i.

Follow the below tutorial if you are struggling with installing GO in windows.

Today, I will show you how do I convert hex to int in golang, as mentioned above I’m going to use the strings.Replace() and strconv.ParseInt() method.

Let’s start our Golang convert hex to int example


package main

import (

func main() {
	hexaString := "23f"
	numberStr := strings.Replace(hexaString, "0x", "", -1)
	numberStr = strings.Replace(numberStr, "0X", "", -1)

	output, err := strconv.ParseInt(numberStr, 16, 64)
	if err != nil {
	fmt.Printf("Output %d", output)

In the above example, we have converted the hex value to a int and printed in golang console. let’s check the output.


Output 575

I hope it helps you, All the best 👍.

Try it Yourself

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