Hex-Decimal Converter with Log History
Convert between hexadecimal and decimal numbers with browser-based conversion history
Hexadecimal
Decimal
Base Conversion
Mathematics
Development
You can use 0x prefix. Valid characters: 0-9, A-F (case insensitive)
Enter a positive integer (0 or greater)
No conversion history yet.
Successfully converted numbers will appear here.
Quick Reference
Common Hex to Decimal Conversions
0x0 = 0
0xA = 10
0xF = 15
0x10 = 16
0xFF = 255
0x100 = 256
0xFFF = 4095
0x1000 = 4096
Hexadecimal Digits
0 = 0
4 = 4
8 = 8
C = 12
1 = 1
5 = 5
9 = 9
D = 13
2 = 2
6 = 6
A = 10
E = 14
3 = 3
7 = 7
B = 11
F = 15
About Hex-Decimal Converter
What is Base Conversion?
Base conversion is the process of changing numbers from one number system to another. Hexadecimal (base-16) uses digits 0-9 and letters A-F, while decimal (base-10) uses digits 0-9.
Common Use Cases
- Programming: Memory addresses, color codes, bit manipulation
- Web Development: CSS color values (#FFFFFF = white)
- Debugging: Analyzing binary data and memory dumps
- Mathematics: Number system education and calculations
History Feature
Successfully converted numbers are automatically saved to your browser's local storage. You can revisit previous conversions, compare different numbers, and manage your conversion history.
Privacy & Security
All number conversions happen in your browser. No data is sent to our servers. History is stored locally in your browser and can be cleared at any time.
Frequently Asked Questions (FAQ)
What is hexadecimal?
Hexadecimal is a base-16 number system that uses digits 0-9 and letters A-F to represent values. It is commonly used in computer science and programming for representing binary data in a more readable format.
How do I convert hexadecimal to decimal?
To convert hex to decimal, multiply each digit by 16 raised to its position power (starting from 0 on the right) and sum the results. For example, FF = (15×16¹) + (15×16⁰) = 240 + 15 = 255.
Can I use the 0x prefix?
Yes! You can enter hexadecimal numbers with or without the "0x" prefix. The tool will automatically handle both formats and strip the prefix during conversion.
What are the limits for conversion?
This tool can handle very large numbers within JavaScript's safe integer range (up to 2^53 - 1). For hexadecimal input, you can use any valid hex digits (0-9, A-F).
Is my conversion history secure?
Yes, all conversions happen locally in your browser. Your conversion history is stored only in your browser's local storage and is never sent to any servers.
Why use hexadecimal in programming?
Hexadecimal is widely used in programming for memory addresses, color codes (like #FF0000 for red), binary data representation, and debugging because it's more compact and readable than binary.
How long is the conversion history kept?
The history is stored in your browser's local storage and persists until you clear it manually or clear your browser data. We keep the last 50 successful conversions.
Can I convert negative numbers?
This tool currently supports positive integers only. For negative numbers in hexadecimal, you would typically use two's complement representation which requires specifying the bit width.