Logarithms are the inverse of exponentiation and appear throughout mathematics, science, and engineering, from pH calculations in chemistry to decibel measurements in acoustics to algorithm complexity in computer science. This logarithm calculator computes log base b of any number x, along with the natural logarithm (ln, base e) and log base 2, which are the most commonly used bases. It also shows the antilog (the result of raising the base to the calculated power), helping verify your answer. Whether you're solving exponential equations, working with logarithmic scales, or just need a quick logarithm calculation, this tool handles any base instantly.