Scientific Notation Converter
Convert any number to scientific (and E) notation, and back.
Convert numbers between standard, scientific and E-notation. Scientific notation writes very large or very small numbers compactly as a mantissa times a power of ten (for example 6.02 × 10²³). Enter any number and the tool shows the scientific form, the E-notation used in code and calculators, and the plain value.
It is invaluable for science, engineering and working with extreme numbers.
Frequently asked questions
What is scientific notation?
A compact way to write numbers as a mantissa (between 1 and 10) times a power of ten, e.g. 0.00042 = 4.2 × 10⁻⁴.
What is E-notation?
The form calculators and code use for scientific notation, where "× 10^n" is written as "en", e.g. 6.02e23.
How do I convert back to a normal number?
Enter the scientific or E-notation value and the tool shows the standard decimal form.
Why use scientific notation?
It keeps very large or very small numbers readable and avoids counting long strings of zeros.