This free online scientific notation calculator converts standard numbers into scientific notation and back again. Use it to quickly express very large or very small numbers as a mantissa multiplied by a power of 10, or to expand scientific notation into a standard number.
Standard → Scientific
Scientific → Standard
How to Use the Scientific Notation Calculator
To convert a standard number to scientific notation, enter it in the "Number" field under "Standard → Scientific" and click "Convert".
To convert scientific notation back to a standard number, enter the mantissa and exponent under "Scientific → Standard".
Click the second "Convert" button to see the expanded standard number.
Frequently Asked Questions
The calculator uses JavaScript's exponential notation to split the number into a mantissa and an exponent. For example, 123000 becomes 1.23 × 10^5.
It multiplies the mantissa by 10 raised to the power of the exponent you enter, i.e. Standard Value = Mantissa × 10^Exponent. For example, 1.23 × 10^5 becomes 123000.
Zero is a special case that is shown as 0 × 10^0, since it has no meaningful mantissa or exponent in scientific notation.
Yes, both conversion tools on this page are completely free with no sign-up required.