Bases 2–36 · exact integers
Convert decimal to octal exactly
Turn a complete signed base-10 integer into canonical base-8 digits with no prefix, grouping, rounding, or scientific notation.
Live conversion
Integer base converter
Up to 4096 ASCII characters; optional leading minus sign.
Enter a whole base from 2 through 36.
Quick base pairs
Switch the source and target while preserving the current valid integer.
Integer notation only: no fractions, exponents, 0x/0b prefixes, separators, whitespace, text encoding, IEEE-754 interpretation, or symbolic expressions.
Exact result
Base 10 to base 8
- Canonical source
- 255
- Source digits
- 3
The same integer in common bases
Value catalog
Common decimal values across five bases
Open a finite, indexable reference page for each curated decimal anchor. Calculator state itself never enters the URL.