What is an ASCII to decimal conversion?

ASCII to decimal conversion translates each text character into its corresponding integer base-10 numerical code point defined by the American Standard Code for Information Interchange (e.g. uppercase \"A\" equals decimal 65).

How does ASCII relate to binary and hexadecimal?

Every ASCII character maps directly to 7 or 8 bits in binary (base-2), two hex digits (base-16), and a single integer (base-10). For instance, character \"A\" is decimal 65, hex 0x41, and binary 01000001.

Can this tool convert Unicode and emojis to decimal?

Yes. By default, standard 7-bit and 8-bit ASCII characters return their standard codes (0-255), while multi-byte Unicode characters and emojis return their full UTF-16 or UTF-32 decimal code points.

What delimiters can I use between decimal values?

You can separate decimal numbers using single spaces, commas, commas with spaces, newlines, semicolons, or format them into programming language array literals.

Encoding Utility

ASCII to Decimal Converter

Convert plain text and ASCII characters into decimal base-10 numerical byte values. Configure custom separators, inspect binary and hex mappings, and generate code literals instantly.

Delimiter:

ASCII / UTF-8 Plain Text Input 0 chars • 0 bytes

Decimal (Base-10) Values 0 values

Character Character-by-Character Inspection

Real-time breakdown of characters into Decimal, Hexadecimal, Binary, and HTML entities.

Position	Char	Decimal (Base-10)	Hexadecimal (Base-16)	Binary (8-bit)	HTML Entity

Understanding ASCII to Decimal Conversion

Computers do not natively understand characters, alphabets, or punctuation symbols; they operate exclusively on binary electrical states (zeros and ones). To bridge human typography and hardware memory, the American National Standards Institute established the ASCII (American Standard Code for Information Interchange) standard in 1963.

In the ASCII system, every character from 0 through 127 is assigned a standardized integer value:

Uppercase Latin Letters (A-Z): Decimal 65 through 90.
Lowercase Latin Letters (a-z): Decimal 97 through 122.
Numeric Digits (0-9): Decimal 48 through 57.
Control Characters: Decimal 0 (Null), 10 (Line Feed \n), 13 (Carriage Return \r), and 32 (Space).

Common Development Use Cases

Data Protocol Parsing: Inspecting raw telemetry bytes over TCP/UDP sockets, serial COM ports, or Bluetooth LE GATT characteristics.
Embedded Systems & Microcontrollers: Transmitting serial data via UART in Arduino, STM32, or ESP32 without string overhead.
Cryptography & Hashing: Supplying numerical byte streams into XOR ciphers, SHA-256 blocks, or HMAC algorithms.
Sanitization & Escaping: Converting sensitive special characters into decimal HTML numeric character references (NCRs) like < for < to prevent XSS injection.

Frequently Asked Questions

What is the ASCII decimal code for letter A?

Uppercase "A" has an ASCII decimal value of 65. Lowercase "a" has a decimal value of 97 (which is exactly 65 + 32, a deliberate design enabling single-bit case inversion).

What is the decimal code for a Space character?

The printable space character (" ") has a decimal value of 32 (hex 0x20, binary 00100000).

How does Extended ASCII differ from Standard ASCII?

Standard ASCII uses 7 bits to encode 128 characters (0-127). Extended ASCII uses an 8th bit to encompass 256 total values (0-255), introducing accented European characters and box-drawing glyphs. Modern systems typically employ UTF-8 for global universality.