Decimal to Octal Converter

Convert Decimal (Base 10) to Octal (Base 8) instantly. Enter any Decimal value to get the Octal equivalent.

Decimal to Octal 6 units

Common Numbers Conversions

Decimal to Octal Conversion Table

Decimal (Base 10) Octal (Base 8)
0 0
1 1
2 2
3 3
4 4
5 5
8 10
10 12
15 17
16 20
32 40
64 100
100 144
128 200
255 377
512 1000
1000 1750
1024 2000
4095 7777
65535 177777

📐 How to Convert Decimal to Octal

To convert from Decimal (base 10) to Octal (base 8), express the integer value using the digits available in the target base. For example, decimal 255 is 255 in Decimal and 377 in Octal.

Use the converter above — type any Decimal value to instantly see its Octal equivalent. Convert Octal → Decimal instead →

Frequently Asked Questions

Q How do I convert Decimal to Octal?
Interpret the Decimal (base 10) number as an integer, then express it in base 8. For example, the Decimal value FF equals 255 in decimal, which is 377 in Octal.
Q What is 255 in Octal?
255 in decimal = 377 in Octal.

ℹ️ About These Units

Decimal
Base 10

A positional numeral system with base 10. Uses 10 distinct digits (0–9).

Octal
Base 8

A positional numeral system with base 8. Uses 8 distinct digits (0–7).