Convert between standard and scientific notation

Write a finite decimal in exponent form or expand an exponent into ordinary decimal form.

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ToolScientific Notation
Input
Output
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Preview

How it works

Exponent output normalizes a finite decimal into one non-zero leading digit and an exponent. Standard output shifts the decimal point according to the parsed exponent, while the selected precision controls display rounding.

  • Automatic mode chooses exponent form for very large or very small magnitudes.
  • Six significant decimal places is a display default, not arbitrary-precision arithmetic.

Worked example

Convert between standard and scientific notation
Convert Avogadro's number to scientific notation
Input
											602214076000000000000000
Output
												6.02214e+23

When to use this

Engineering notes write 0.00000042 as 4.2e-7, JSON logs inspect exponent notation, and laboratory spreadsheets display measurements spanning orders of magnitude.

Edge cases

  • A value such as 1e309 becomes non-finite and is rejected rather than displayed as a valid number.
  • Leading and trailing whitespace is trimmed before parsing.
  • Binary floating-point representation can make a decimal with many digits round at the selected precision.

References