Scientific Notation Calculator
Convert between decimal numbers and scientific (E) notation in both directions.
Decimal → scientific notation
Scientific notation → decimal
1.496
8
Standard form from E-notation: 149,600,000
Formula
About this calculator
Scientific notation expresses a number as a mantissa between 1 and 10 multiplied by a power of ten. It makes very large or very small numbers compact and easy to compare. For example, 149,600,000 becomes 1.496 × 10⁸.
This calculator converts a decimal number into scientific notation with your chosen number of significant digits, and also parses E-notation (such as 1.496e8) back into a standard decimal value. The mantissa and exponent are listed separately for clarity.
Frequently asked questions
The mantissa (or coefficient) is the decimal part of scientific notation, a number with absolute value at least 1 and less than 10. In 1.496 × 10⁸ the mantissa is 1.496.
The "e" stands for "times ten to the power of," so 1.496e8 means 1.496 × 10⁸ = 149,600,000.
Use a negative exponent. For example 0.00042 becomes 4.2 × 10⁻⁴, since you move the decimal point four places to the right.
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