Units & Numbers Tools
Scientific Notation Converter
Convert between standard numbers and scientific notation.
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What is Sci Notation?
A converter between plain decimal numbers and scientific/engineering notation, useful for physics, data, and code constants.
How it works
The number is expressed as coefficient × 10^exponent, computed from its decimal point position; the reverse parses the E-notation string.
- Enter your input. Type or paste your input into the field above — the tool responds instantly.
- Review the result. Output updates live as you type. Everything runs entirely in your browser.
- Copy or download. Use the Copy button to grab the result, or Download to save it as a file.
Examples
Large and small numbers
Convert 6.02 × 10²³ to full decimal form, or shrink 0.000000001 into 1 × 10⁻⁹ for clean calculations.
Common mistakes
Exponent sign errors
A negative exponent means a small number, not a negative number — 1 × 10⁻³ is 0.001, not -1000.
Frequently asked questions
What formats does it accept?
Standard form (3.4e5), decimal, and E-notation are all parsed and converted between each other.
Does it round the mantissa?
The mantissa is preserved exactly; you choose how many significant digits to display.