Decimal to hexadecimal converter

Q: What input formats are supported?

We accept integers with optional sign and separators in whitespace or underscores. Separators are removed before calculation; fractional parts or exponents are not supported.

Q: How does padding work?

If you enter a number, we left-pad with zeros up to that width of hexadecimal digits. Each digit is 4 bits, useful for bytes (2), words (4), or long addresses.

Q: How are signs and letters shown?

The negative sign is added back after the conversion (we do not use two's complement). You can choose uppercase or lowercase for A–F in the advanced options.

Q: Is there a size limit?

We use BigInt so we handle very large integers. For the steps table we show up to 512 divisions to keep it readable.

Q: Can I copy or reuse the results?

Yes, each block includes a quick-copy button. If your browser blocks programmatic copy, we will show a notice and you can still select the text manually.

Convert decimal to hexadecimal with BigInt, upper/lowercase output and padding. Includes binary and octal equivalents plus a step-by-step division table.

Online decimal to hexadecimal calculator (with steps)

Convert any decimal number to hexadecimal with BigInt, also get binary and octal, and review the automatic successive division table.

Decimal → Hexadecimal Hexadecimal → Decimal Decimal → Binary Decimal → Octal

Decimal (supports sign, whitespace or _ separators)

Hexadecimal

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Successive division by 16

Clean decimal

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Binary

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Base 2 equivalent

Octal

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Base 8 equivalent

Automatic steps: successive divisions by 16

Step	Quotient	Remainder	Build

How to convert decimal to hexadecimal

Normalize the input. Remove spaces and underscores, keep the sign, and validate only decimal digits remain.
Separate the sign. Work with the absolute value and keep whether it was negative to add back later.
Divide successively by 16. Each step uses the quotient for the next division and the remainder (0–15) becomes a hex digit via 0–9 and A–F.
Build the result. Read the remainders in reverse order (last to first); if the number was 0, the output is 0.
Tune the format. Apply upper/lowercase, add 4-bit-multiple padding if needed, and reattach the original sign.