FreeDev Tools

Scientific Notation Converter

Convert numbers between decimal, scientific, E-notation, and engineering notation.

Runs locally in your browser. Your input is not uploaded.

How to Use

  1. 1

    Enter numbers

    One per line — plain decimals, 1.23e4, or 4.2 × 10^-7 all work.

  2. 2

    Results appear instantly

    Each number is shown in decimal, scientific, E-notation, and engineering form.

  3. 3

    Copy the notation you need

    Use copy or download to grab the converted values.

Frequently Asked Questions

A way of writing numbers as m × 10^n with 1 ≤ |m| < 10: the speed of light 299,792,458 becomes 2.99792458 × 10^8. Enter any number to see this plus E-notation and engineering form.