Articles

These guides explain the ideas behind our converters in plain English — what hexadecimal really is, how to convert numbers by hand, how hex color codes work, and how text becomes numbers. Read them alongside the decimal to hexadecimal converter and the other free tools on this site.

• What Is Hexadecimal?

  A plain-English explanation of hexadecimal: what base-16 means, why it uses the letters A–F, and where you will run into hex in everyday computing.

  Last updated: 2026-06-19

• How to Convert Decimal to Hexadecimal by Hand

  Step-by-step worked examples of converting decimal numbers to hexadecimal using repeated division by 16, plus a way to check your answer.

  Last updated: 2026-06-19

• Hex Color Codes Explained

  Understand hex color codes: how #RRGGBB maps to red, green, and blue channels, what shorthand and eight-digit codes mean, and how to read alpha.

  Last updated: 2026-06-19

• Why Programmers Use Hexadecimal

  Hexadecimal lines up perfectly with binary: one hex digit is a nibble, two are a byte. Here is why that makes hex the everyday language of low-level code.

  Last updated: 2026-06-19

• ASCII, Unicode, and Character Codes

  How computers turn letters into numbers: the ASCII table, how Unicode extended it to every script, and how UTF-8 encodes code points into bytes.

  Last updated: 2026-06-19