21K School/ Calculators/ Octal to Decimal Calculator

Octal to Decimal Calculator

Convert octal (base-8) numbers to decimal (base-10) with step-by-step positional working.

Base-8 Input

FEATURE

Positional Value

METHOD

Instant

OUTPUT

Enter Values

Octal Number (digits 0–7 only)

Result

Result—

Detail—

Notes—

Steps

How It Works

Enter an octal number using digits 0–7 only.

Each digit is multiplied by 8 raised to its position.

All positional values are summed to get the decimal.

Example

157₈

= 1×8² + 5×8¹ + 7×8⁰

= 64 + 40 + 7

= 111₁₀

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