Antilog Calculator
Calculate the antilogarithm — the inverse of a logarithm.
Undoing a logarithm
The antilogarithm reverses a logarithm: if a log takes a number to its exponent, the antilog takes that exponent back to the number. This calculates it, which is really just raising the base to the given power.
Enter a value and base to calculate the antilog.
What the antilog is really doing
The antilog can sound mysterious but it is simply exponentiation — the antilog of a number, in a given base, is that base raised to the number. It exists as a named idea because logarithms and antilogs are a matched pair, one undoing the other, and both were essential in the era of log tables and slide rules, when antilogs were how you got back to an ordinary number after doing a calculation in logarithms. That era is gone, but the concept remains useful wherever you work with logarithmic quantities and need to return to the original scale — converting a decibel level back to a sound intensity, or a pH back to a concentration. Understanding the antilog as just raising the base to a power removes the mystery and shows it is a tool you already have.
Questions & answers
What is an antilogarithm?
The inverse of a logarithm — it takes an exponent back to the original number by raising the base to that power. It is simply exponentiation.
When is the antilog useful?
Whenever you work in logarithmic quantities and need the original scale back — converting decibels to sound intensity, or pH to concentration.
Is anything uploaded?
No. The calculation happens in your browser.