Hexadecimal (base-16) is a number system that uses 16 symbols: the digits 0–9 and the letters A–F. It is widely used in computing because each hex digit maps to exactly 4 binary bits, making it a compact way to represent binary data.

Can I convert negative numbers?

Yes. Negative integers are converted using their two's complement representation is NOT assumed here — the tool simply prepends a minus sign and converts the absolute value, which is the standard mathematical convention.

What is the largest number supported?

The tool uses JavaScript's BigInt, so it handles integers of arbitrary size with full precision, far beyond the 64-bit integer limit.

How do I read hex letters like A, B, C?

In hexadecimal, A = 10, B = 11, C = 12, D = 13, E = 14, and F = 15 in decimal. So the hex value "1F" equals 1×16 + 15 = 31 in decimal.

Are the results case-sensitive?

Hexadecimal letters are not case-sensitive; "1a" and "1A" represent the same value. This tool lets you toggle between uppercase and lowercase output to match your project's convention.

Decimal to Hexadecimal Converter

Name: Decimal to Hexadecimal Converter
Availability: InStock
Author: Nham Vu

Type any decimal integer and instantly see its hexadecimal equivalent, along with binary and octal representations.

Decimal Input

Enter a decimal integer

Uppercase hex (A–F)

Quick examples

Conversion Results

Hexadecimal (base 16)

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Binary (base 2)

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Octal (base 8)

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Decimal (base 10)

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Summary

Type any decimal integer and instantly see its hexadecimal equivalent, along with binary and octal representations.

How it works

Type a decimal integer into the input field.
The hexadecimal result updates in real time as you type.
Binary and octal equivalents are shown below the main result.
Use the Copy button to copy the hex value to your clipboard.
Toggle uppercase/lowercase hex output to match your preference.

Use cases

Convert color decimal values to hex codes for CSS and design work.
Translate memory addresses from decimal to hex when reading documentation.
Verify bit patterns when working on embedded systems or hardware registers.
Quickly check hexadecimal representations during programming assignments.
Convert large integers to hex for use in cryptography or protocol work.
Cross-check number base conversions while studying computer science.

Frequently Asked Questions

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Last updated: 2026-05-23 · Reviewed by Nham Vu