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Math Scientific Notation Calculator

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How this scientific notation calculator works

Enter a finite number. The calculator rewrites it with toExponential(6), so the result is a mantissa with six digits after the decimal, then e and a power of ten. 1234567 becomes 1.234567e+6. 0.000123 becomes 1.230000e-4. An empty field shows “--.”

That e form means a × 10^b. A positive exponent moves the decimal point right: 1.500000e+3 is 1500. A negative exponent moves it left: 1.000000e-3 is 0.001. An exponent of zero keeps the magnitude of the mantissa: 1.5 becomes 1.500000e+0.

Negatives keep a leading minus on the mantissa. −4.2 becomes −4.200000e+0. −98765 becomes −9.876500e+4. The six fixed decimal places can round the mantissa, so a long input such as π may appear as 3.141593e+0.

This page only prints scientific notation. It does not show a separate decimal line. For both forms from one value, use the scientific notation converter.

Scientific notation examples

Each row matches toExponential(6) for that number.

NumberScientificWhat it marks
12345671.234567e+6Large whole number
15001.500000e+31.5 × 10³
0.0001231.230000e-4Small decimal
0.0011.000000e-3Thousandth
1.51.500000e+0Exponent zero
−4.2−4.200000e+0Negative value
−98765−9.876500e+4Negative and large
3.1415926535897933.141593e+0Six-decimal mantissa

How to read the result

  • Mantissa + e

    Six decimals after the point, then the power of ten.

  • Positive exponent

    1.500000e+3 means 1500.

  • Negative exponent

    1.000000e-3 means 0.001.

  • Leading minus

    Applies to the whole number, as in −9.876500e+4.

Frequently asked questions

  • What does this scientific notation calculator show?

    Your number rewritten in e form with six digits after the decimal in the mantissa. 1234567 becomes 1.234567e+6. 0.000123 becomes 1.230000e-4. Until you enter a finite number, the result stays as “--.”

  • What is scientific notation here?

    A value written as a × 10^b and printed as a e±b. The mantissa a has one digit before the decimal when possible, and the exponent b is an integer. 1500 is 1.500000e+3, which means 1.5 × 10^3.

  • Why are there always six decimals after the point?

    The page uses toExponential(6). The mantissa always shows six digits after the decimal. 1.5 becomes 1.500000e+0. π becomes 3.141593e+0.

  • How do I read a positive exponent?

    Move the decimal point that many places to the right. 1.500000e+3 is 1500. 1.234567e+6 is 1234567.

  • How do I read a negative exponent?

    Move the decimal point that many places to the left. 1.000000e-3 is 0.001. 1.230000e-4 is 0.000123.

  • What about negative numbers?

    The leading minus applies to the whole value. −4.2 becomes −4.200000e+0. −98765 becomes −9.876500e+4.

  • What inputs are accepted?

    Any finite number in the number field. An empty field or a non-finite value leaves the result as “--.”

  • Does this convert back to decimal?

    No. This page only prints scientific notation. For both scientific and decimal lines from the same value, use the scientific notation converter tool.

  • Is e the same as × 10^?

    Yes. 1.234567e+6 means 1.234567 × 10^6. 1.000000e-6 means 1 × 10^−6. The e form is what the calculator displays.

  • Why might the mantissa look rounded?

    Six fixed decimal places can round the mantissa. A long decimal may not match every digit of the original number on the scientific line, even though the exponent still places the magnitude correctly.