Hexadecimal Number to Decimal Number

Using parseInt, Number, and BigInt

Hex Number to Decimal Conversion

Different Methods for Conversion

To Convert Hexadecimal to Decimal number, following options are available using parseInt, Number, BigInt

Using parseInt

script.js
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                const hexNumber = "1f300";
const decimal = parseInt(hex, 16);

console.log("Decimal Number: ", decimal); // Output: Decimal Number: 127744
              

Using BigInt

script.js
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                const largeHex = "EFEFAAABB1234F";
// Standard parseInt loses accuracy and precision:
console.log(parseInt(largeHex, 16)); // Output: 67536035737838420

// Using BigInt for large number and good accuracy:
const accurateDecimal = BigInt("0x" + largeHex).toString();
console.log(accurateDecimal); // Output: 67536035737838415
              

Using Number

script.js
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                const hex = "0xAA";
let num = Number(hex); //Needs to have 0x prefix (detect automatically)
console.log(num); // Output: 170
              

Javasript - Hex Check

Javasript - File read write line by line