Logarithms

Logarithms explained: common, natural (ln), base-10 and binary. With graphs, rules, equation solving and real-world examples.

Pick a calculator. Each has the computation, a graph, the rules and real-world uses.

Logarithm (logₐx)

Calculate a logarithm with any base. With graph, rules and real-world examples.

Calculate the natural logarithm (base e). With graph and explanation.

Calculate the base-10 logarithm. With graph and explanation.

Calculate the base-2 logarithm, essential in computing.

Antilogarithm – from a logarithm back to the number (aˣ).

Solve logₐx = y for any unknown (base, argument or result), with steps.

Interactive reference of logarithm rules (product, quotient, power, change of base) with examples.