Scientific Notation Converter

Convert decimal numbers to scientific notation and scientific notation to plain decimal.

Input

Result not what you expected?Tell us what happened and we will fix it fast.

Working with very large and very small numbers

Last updated: March 30, 2026

A scientific notation converter improves readability for values that are unwieldy in plain decimal form, such as measurements in physics, chemistry, and astronomy.

Converting between decimal and e-notation is a frequent need in calculators, lab reports, and code where precision formatting matters.

This tool provides quick two-way conversion without opening spreadsheets or specialized software.

Frequently asked questions

What is scientific notation?

Scientific notation expresses numbers as a coefficient times 10 raised to an exponent, such as 4.5 × 10⁻⁸.

Why use scientific notation?

It makes very large or very small values easier to read and compare in science and engineering.

Is e-notation the same thing?

Yes. 4.5e-8 is the compact computer-friendly form of 4.5 × 10⁻⁸.