Scientific Notation Converter

Scientific Notation Converter

Local Processing

Convert real numbers into scientific exponential notation (e.g. 1.23 × 10^5) with custom precision.

How It Works & Processing Standards

Enter values above to calculate results automatically. Check each input field for guidance and units.

Tool processing runs in your browser. If you create a calculator or conversion share link, its values are included in the URL. See the privacy policy for account, analytics and advertising data.

Writes 299,792,458 as 2.998e+8 — a mantissa times a power of ten. Choose the decimal places, or convert the other way.

How to Use Scientific Notation Converter

  1. 1
    Enter a numberType a plain number or exponential notation such as 1.5e-7.
  2. 2
    Direction and digitsChoose which way to convert and the mantissa decimal places.
  3. 3
    CopyThe result is ready to paste into a report or code.

Examples

Speed of light (m/s)
Input: 299,792,458, 3 decimals
Result: 2.998e+8
Small concentration
Input: 0.000123, 2 decimals
Result: 1.23e-4

Common Use Cases

  • Writing large numbers compactly in science and engineering reports
  • Checking what a spreadsheet value like 1E+10 really is
  • Presenting measurements with a fixed number of significant digits

Frequently Asked Questions (FAQ)

What does e+8 mean?

Times 10⁸. 2.998e+8 is 2.998 × 100,000,000 = 299,800,000.

Are decimal places rounded?

Yes. The mantissa is rounded to the chosen number of decimals.

Have feedback or ideas for this tool? Suggest & Inquire →