Scientific Notation Converter
Convert a number between plain decimal and scientific notation — enter either form and it auto-detects the direction — instantly, in your browser.
Convert a number between plain decimal and scientific notation. Enter either form. It runs in your browser.
How to use it
- Type a number as a decimal (0.00045) or in e-notation (3.2e5).
- Read the decimal value and the scientific form.
Examples
- 602,200,000,000,000,000,000,000 is 6.022 × 1023 (shown as 6.022e+23 for the decimal).
- 0.00045 is 4.5 × 10−4.
- 3.2e5 is 320,000, or 3.2 × 105.
Good to know
Standard form has a front number from 1 up to (but not including) 10, so 12 × 103 should be 1.2 × 104. The “e” in e-notation means “times ten to the power of” and is not Euler’s number. The tool only rewrites the number: it does not round it or judge how many significant figures your measurement supports. Engineering notation is not covered.
More in the guide and the glossary entry.
FAQs
Why does very large input show e+23?
Computers write very large decimals in e-notation. 6.022e+23 means 6.022 × 1023.
Does a negative exponent mean a negative number?
No. It means a small number: 10−4 is 0.0001.