TXT · Text & Data tools

Octal to Hex Converter

Input

Output (Hex)

Go To Full Number Base Converter

Convert octal integers (base 8) into standard uppercase hexadecimal values (base 16). This variant runs in batch mode automatically, letting you paste a list of octal strings and receive their exact hex equivalents line by line.

Supported octal formats

Inputs must contain standard octal numerals (0-7). You can include 0o prefixes, and the tool will automatically ignore any spaces or underscores. Signed values are supported by appending a leading + or -, and the resulting sign is strictly preserved in the hex output.

Error handling

The converter processes each line independently. If any line contains invalid characters—like 8, 9, letters, or punctuation—it outputs a localized error message without interrupting the rest of the batch conversion.

Precision and scale

All calculations execute locally using native Javascript arbitrary-precision integers (BigInt). This guarantees absolute precision for extremely large octal inputs, completely bypassing traditional 64-bit integer limits and floating-point errors.

Frequently Asked Questions

Does this support negative octal numbers?

Yes. Use a leading minus sign (−) or plus sign (+). The sign is preserved in the hex output.

Can I convert multiple octal values at once?

Yes. This variant runs in batch mode by default: paste one octal integer per line and get one hex result per line.

Can I paste values with a 0o prefix?

Yes. Inputs like 0o755 are accepted in this variant.

Will the hex output be uppercase or lowercase?

Uppercase by default (A–F). This variant hides formatting controls to keep output consistent.

Does it accept spaces or underscores in octal?

Yes. Spaces and underscores are ignored, so values like 7_55 or 0o7 55 work.

Try one of our format-specific converters below

Full Number Base Converter tool

001Binary to Decimal Converter

002Binary to Hex Converter

003Binary to Octal Converter

004Decimal to Binary Converter

005Decimal to Hex Converter

006Decimal to Octal Converter

007Hex to Binary Converter

008Hex to Decimal Converter

009Hex to Octal Converter

010Octal to Binary Converter

011Octal to Decimal Converter

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