Number conversion

ASCII, Hex, Binary, Decimal converter

ASCII, Hex, Binary, Decimal converter with clear formulas, units, and examples. Runs locally in your browser. Free online tool — no sign-up.

Instant result

Result

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Formula —

Formulas

Core equations used by this converter.

Formulavalue = d₀·b⁰ + d₁·b¹ + d₂·b² + … + dₙ₋₁·bⁿ⁻¹

iFollow the formulas shown. Calculation runs locally in your browser.

Use the interactive panel at the top of the page.

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Common values with formula and result.

4E₁₆ = 4×16 + 14 = 78₁₀ → 'N'

'N'

01000001₂ = 64 + 1 = 65₁₀ → 'A'

'A'

Version 1.1.0 · Engine tested

Calculation status

Definition: **ASCII** — American Standard Code for Information Interchange; maps characters and control codes to integers **0–127** (7-bit). Extended/Unicode encodings go beyond this; classic ASCII charts use 0–127. **Decimal (base 10)** — everyday digits 0–9; the code point as a base-10 integer (e.g. `'A'` → 65). **Binary (base 2)** — digits 0 and 1; each ASCII byte is often shown as 8 bits (e.g. `01000001`).
What it calculates: Convert ASCII characters to hex, binary, and decimal (and back). Positional base methods, Base64 note, printable chart, and worked examples.
Inputs: Values required by the selected conversion mode
Outputs: Converted result in the target unit or format
Formula: value = d₀·b⁰ + d₁·b¹ + d₂·b² + … + dₙ₋₁·bⁿ⁻¹
ASCII printable conversion chart (selected): Char Decimal Hex Binary
H 72 48 01001000
i 105 69 01101001
Assumptions: Conversion runs locally in the browser; values are not uploaded.
Uses the formulas documented on this page.
Units: Formula
Boundary conditions: Empty or invalid input yields no valid result.
Out-of-range values may be rejected by the tool runtime.
Example: Hex `4E` → ASCII → 'N'
Validation cases: Hex `4E` → ASCII → 'N'
Binary `01000001` → ASCII → 'A'
Sources: CalculatorX converter runtime
Standard unit / encoding definitions where applicable
Calculation version: 1.1.0

Char	Decimal	Hex	Binary
H	72	48	01001000
i	105	69	01101001

Interpretation and common distinctions.

Use the converter tabs to switch direction when available. Results for ASCII, Hex, Binary, Decimal converter update locally in your browser.

Key distinctions behind the conversion.

How do you convert using ASCII, Hex, Binary, Decimal converter?

Use value = d₀·b⁰ + d₁·b¹ + d₂·b² + … + dₙ₋₁·bⁿ⁻¹. Example: Hex `4E` → ASCII → 'N'.

Can I switch direction?

Open the related reverse converter listed under Related tools.

Does this run online or locally?

Calculation runs locally in your browser. Values are not uploaded.

How precise are the results?

Results follow the formulas on this page. Round to the precision your use case needs.