Antilogarithm Calculator

b^x — the inverse of a logarithm. Given the log value and base, recover the original number.

Inputs

Result

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General calculation reads

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Scientific calculator (Casio fx-991EX)
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How to use this calculator

  • Enter the exponent and base.
  • Read the antilog (b^x).

About this calculator

The antilogarithm is the inverse of a logarithm: log_b(antilog) = log_b(b^x) = x. Useful for converting log-scale measurements (decibels, pH, magnitudes) back to linear values. 10^2 = 100, 10^pH = hydrogen ion concentration, etc.

Frequently asked

How is antilog different from exponentiation?+
It's the same math (b^x). "Antilog" is just the historical name when used as the inverse of a log table.
Why does this calculator exist if it's just b^x?+
Convenience and discoverability — many users searching "antilog" don't know it's the same as exponentiation.
Can I compute antilog of a negative number?+
Yes — b^(-x) = 1/b^x. Returns a positive fractional value.
What is e^x called?+
"Exponential function" or "natural antilog". Inverse of the natural log ln(x).
Why is base 10 most common in tables?+
Pre-calculator days: base-10 logs were tabulated to 4 or 5 decimal places, and "antilog" tables let you go from a log value back to the original.

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