What is the formula for HEX ⇄ ASCII ⇄ Decimal Converter?

Core formula: ASCII code = byte value; hex uses two digits per byte, 0x41 = "A". The tool returns results instantly using this formula and the selected parameters.

HEX ⇄ ASCII ⇄ Decimal Converter

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Convert between hex frames, text and decimal bytes, with byte count and non-printable characters — the most common first step in serial protocol debugging.

Key points

HEX ⇄ ASCII ⇄ Decimal Converter: Convert between hex frames, text and decimal bytes, with byte count and non-printable characters — the most common first step in serial protocol debugging. Formula: ASCII code = byte value; hex uses two digits per byte, 0x41 = "A". Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Chinese characters are 3 bytes in UTF-8; on GBK devices confirm the encoding first or you will see mojibake.

Inputs

ASCII code = byte value; hex uses two digits per byte, 0x41 = "A"

Calculation model (updates with parameters)

Text	Hello
Byte count	5	A Chinese character is 3 bytes in UTF-8
Decimal bytes	72 101 108 108 111
Non-printable bytes	0	Text view shows · for non-printable bytes

Engineering notes

Chinese characters are 3 bytes in UTF-8; on GBK devices confirm the encoding first or you will see mojibake.

FAQ

What is HEX ⇄ ASCII ⇄ Decimal Converter for?: Convert between hex frames, text and decimal bytes, with byte count and non-printable characters — the most common first step in serial protocol debugging.
What is the formula for HEX ⇄ ASCII ⇄ Decimal Converter?: Core formula: ASCII code = byte value; hex uses two digits per byte, 0x41 = "A". The tool returns results instantly using this formula and the selected parameters.
What engineering notes should I keep in mind when using HEX ⇄ ASCII ⇄ Decimal Converter?: Chinese characters are 3 bytes in UTF-8; on GBK devices confirm the encoding first or you will see mojibake.