Antilog Calculator – Antilogarithm
Use our antilog calculator to find the antilogarithm (inverse log) instantly. Includes what is antilog, the antilog equation, an antilog calculation example, and how to do anti log on calculator or in Excel (including natural antilog).
What is Antilog?
Antilog (antilogarithm) is the inverse of a logarithm. If a logarithm tells you the exponent, the antilog gives you the original number.
In other words, if log_b(x) = y, then the antilog (base b) of y is x = b^y. That’s what is antilog in practical terms.
People often search anti log on calculator when they want to “undo” a log result. This antilog calculator supports common antilog (base 10) and natural antilog (base e).
Antilog Equation
To calculate antilog, raise the base to the logarithm value.
If log_b(x) = y, then antilog_b(y) = x.
This is often written as antilog(y) when the base is 10.
Natural antilog uses base e (same as undoing ln).
So the antilog of 2.3 (base 10) is about 199.526.
Natural antilog is e raised to the power of y.
How to Use the Antilog Calculator
- 1
Enter the logarithm value (y).
- 2
Enter the base (b). Use 10 for common antilog or e for natural antilog.
- 3
The calculator computes the antilog using x = b^y.
- 4
Read your antilog result (x).
Frequently Asked Questions
Antilog is the inverse of a logarithm. If log_b(x) = y, then antilog_b(y) = x = b^y.
Use the exponent key: compute b^y. For common logs, use 10^y. For natural logs, use e^y.
Most scientific calculators have 10^x (antilog base 10) and e^x (natural antilog). These undo log and ln.
It’s commonly shown as 10^x for base-10 antilog and e^x for natural antilog (inverse of ln).
Use 10^x to undo log base 10, or e^x to undo ln (natural log). Some calculators label these as INV + LOG or SHIFT + LOG.
Yes—enter y and choose base 10 for antilog or base e for natural antilog.
For base 10: =10^A1 (if A1 is y). For base e (natural antilog): =EXP(A1). This is the common antilog excel approach.
The antilog equation is x = b^y, where b is the base and y is the log value.
Yes—see the examples above for base 10 and natural antilog.
Most calculators directly support base 10 and base e. For other bases, use b^y if your calculator has an exponent function.