Convert between decimal and scientific notation

With Scientific notation, students, teachers and analysts can verify a calculation during study or analysis. Convert between decimal and scientific notation.

Convert between decimal and scientific notation. Use it free in your browser without creating an account, then review the result before moving to the next step.

How to use

Enter a decimal number or a notation such as 1.23e6.
Check that the decimal separator matches your input.
Run the conversion to get the other notation.
Compare the result with the expected value in your exercise.
Clear the field if you want to convert another number.

Example

With an input such as 1.23e6, the tool shows the matching decimal value and lets you check a conversion. Look at the number of zeros and the position of the decimal point to confirm that the exponent was interpreted correctly.

Input

1.23e6

Output

1230000 = 1.23 × 10^6

Limits and formats

The conversion does not replace a precision calculation if you must keep many significant digits.
Accepted notations may vary depending on the decimal separator and the case of the exponent.
A very large or very small result may be rounded in the display; keep the exact value if it is critical.
Always check the exponent sign, because a mistake changes the order of magnitude.

Where processing happens

The calculation runs in your browser. The number you enter stays on your device and is not sent to any external service. You can perform conversions one after another without an account or storage, which makes it easy to check homework or a quick technical value.

Frequently asked questions

What is scientific notation used for?

It writes very large or very small numbers with a mantissa and a power of ten. This form is common in science, engineering and programming. The tool helps you switch between notations so you can verify a result.

How do I read a negative exponent?

A negative exponent means division by a power of ten, so the number is smaller than one. For example, an e-3 notation moves the decimal point to the left. Check the sign carefully to avoid an order-of-magnitude error.

Can I convert several numbers at once?

The simplest approach is to handle one number at a time so the result stays readable. If you need to convert a list, repeat the operation or prepare consistent lines. Then check each conversion separately before reusing the values.