Math

Logarithm Calculator

Compute logb(x) for any base, natural and common logs, and antilogs — with exact simplification shown.

logb(x) = ln(x) ÷ ln(b)    by = x

🔎 Any base

Base 2 for computer science, base 10, or any custom value.

✓ Built-in check

We verify every answer by raising the base back to the result.

📊 Antilog mode

Reverse direction: compute b raised to any exponent.

⚡ Exact & decimal

See clean simplified results plus high-precision decimals.

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