Octal to Decimal Converter
Convert octal (base-8) numbers to decimal (base-10) by entering each digit.
Decimal Value
100
How to Convert Octal to Decimal
Method
Octal (base-8) uses digits 0-7. Each position represents a power of 8.
Decimal = d4×8⁴ + d3×8³ + d2×8² + d1×8¹ + d0×8⁰
For example, octal 144 = 1×64 + 4×8 + 4×1 = 64 + 32 + 4 = 100.
Example Calculation
Convert octal 00144 to decimal.
- 010×4096 + 0×512 + 1×64 + 4×8 + 4×1
- 02= 0 + 0 + 64 + 32 + 4
- 03= 100
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