Scientific Notation Converter
Convert between decimal and scientific notation.
Scientific notation, both ways
Very large and very small numbers are clearer in scientific notation: 0.00042 becomes 4.2 × 10⁻⁴. This converts an ordinary decimal to that form and back.
It is the practical way to read a value like 6.022e23 from a calculator or dataset back into an ordinary number, or to compress a long string of zeros into a compact form.
Significant figures
The exponent tracks the decimal shift while the mantissa carries the significant digits. Everything runs in your browser and nothing is uploaded.
Frequently Asked Questions
How does the scientific notation converter work?
The tool formats numbers as coefficient times ten to an exponent, then can parse E notation back to a standard decimal. 1,230,000 becomes 1.23e+6.
When should I use this tool?
Use it for lab values, engineering notes, astronomy, chemistry, data tables, and tiny or huge measurements.
What is the main limitation?
JavaScript displays extremely large or tiny values in exponential notation automatically.
Is this converter private?
Yes. It runs entirely in your browser, so your values are not uploaded or stored.
More free browser utilities for conversion, formatting, and technical cleanup.