Decimal Converter
Type a base-10 whole number and get its binary, octal and hexadecimal forms at once. Arbitrary-precision arithmetic keeps numbers beyond 2⁵³ exact, which ordinary calculators cannot do.
How to use the Decimal Converter
- Enter a whole number in decimal.
- Read the binary, octal and hexadecimal results.
- Copy any result using its Copy button.
- Use the bit grouping panel to inspect the binary form.
Features
- Exact results for integers of any practical size
- Binary, octal and hex shown together
- Negative numbers supported
- Thousands separators for readability
Benefits
- Convert IDs and large counters without precision loss
- Prepare values for programming and networking
- Check homework answers in number systems
Frequently asked questions
Does it support decimal fractions like 10.5?
No. Base conversion here is for whole numbers (integers) so that results are exact.
Why do some calculators give wrong results for big numbers?
Standard floating-point numbers are exact only up to 9,007,199,254,740,991. This tool uses BigInt, so larger values stay exact.
How do I convert 255 to hex?
Enter 255 and the hexadecimal result FF appears instantly, along with 11111111 in binary and 377 in octal.
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