Hexadecimal calculator

Perform arithmetic and bitwise operations on hexadecimal numbers.

The result is shown in hexadecimal, decimal and binary. Arithmetic results exceeding the selected width are flagged.

Method and assumptions

Method version 1.0.0 · Updated October 5, 2026

Calculate with hexadecimal numbers

Formula: Addition, subtraction, multiplication, integer division, and bitwise AND, OR and XOR.

Operands accept digits 0–9 and A–F, with or without 0x. Division is integer division and discards the remainder. The selected width applies to bitwise operations; arithmetic results may exceed it.

left: First hexadecimal operand
operation: Operation
right: Second hexadecimal operand
width: Width for bitwise operations

Each operand accepts 1 to 64 hexadecimal digits. Division returns a truncated integer quotient. Bitwise operations accept unsigned operands that fit the selected width (8, 16, 32 or 64 bits).

Calculate with code

These short examples use the same inputs and core calculation as this tool. Adapt validation and formatting to your application.

JavaScript

const result = BigInt('0x2A') + BigInt('0x18');
console.log('0x' + result.toString(16).toUpperCase()); // 0x42

TypeScript

const result: bigint = BigInt('0x2A') + BigInt('0x18');
console.log(`0x${result.toString(16).toUpperCase()}`); // 0x42

Python

result = int('2A', 16) + int('18', 16)
print(f'0x{result:X}')  # 0x42

Java

import java.math.BigInteger;

var result = new BigInteger("2A", 16).add(new BigInteger("18", 16));
System.out.println("0x" + result.toString(16).toUpperCase()); // 0x42

using System.Numerics;

var result = BigInteger.Parse("2A", System.Globalization.NumberStyles.HexNumber)
    + BigInteger.Parse("18", System.Globalization.NumberStyles.HexNumber);
Console.WriteLine($"0x{result:X}"); // 0x42

More languages

#include <stdio.h>
#include <stdlib.h>

unsigned long result = strtoul("2A", NULL, 16) + strtoul("18", NULL, 16);
printf("0x%lX\n", result); // 0x42

C++

#include <iomanip>
#include <iostream>

const auto result = std::stoull("2A", nullptr, 16) + std::stoull("18", nullptr, 16);
std::cout << "0x" << std::uppercase << std::hex << result << "\n"; // 0x42

PHP

$result = hexdec('2A') + hexdec('18');
printf('0x%X\n', $result); // 0x42

PowerShell

$result = [Convert]::ToInt64('2A', 16) + [Convert]::ToInt64('18', 16)
'0x{0:X}' -f $result # 0x42