Scientific Notation Converter
Convert numbers to and from scientific notation.
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Convert scientific notation both ways
Type a regular number to express it in scientific notation, the compact standard form like 1.2345e+4, or paste a value in that form to expand it back to a plain number. Scientists and engineers rely on this notation to write very large and very small quantities without long runs of zeros. Conversion is instant and two-way.
How it reads
12345 becomes 1.2345e+4, and 0.0042 becomes 4.2e-3.
Frequently asked questions
What does the e mean?
The e stands for times ten to the power of, so 4.2e-3 means 4.2 multiplied by ten to the minus three, which is 0.0042.
Why use scientific notation?
It keeps very large and very small numbers short and readable, which is why it is standard in science and engineering.