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Math Scientific Notation Converter

Scientific: --

Decimal: --

How this scientific notation converter works

Type a decimal or an e-form value such as 1.5e3. The page parses it as a number, then shows two lines. Scientific is toExponential(6), so the mantissa always has six digits after the decimal: 1234567 becomes 1.234567e+6. Decimal is the same value without grouping commas, using up to 15 significant digits: 1.5e3 becomes 1500.

Scientific notation writes a number as a × 10^b. On this page that appears as a e±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. A leading minus on the mantissa means the whole value is negative: −4.200000e-2 is −0.042.

Either form can go in the input. 0.000123 shows Scientific 1.230000e-4 and Decimal 0.000123. 6.02e23 shows Scientific 6.020000e+23 and a long decimal string. An empty field or text that is not a finite number leaves both results as “--.”

The two lines are displays of one parsed value. The fixed six-decimal scientific format can round the mantissa, and the decimal line can stop at 15 significant digits for very precise inputs.

Scientific notation examples

Each row matches toExponential(6) and the decimal display for that input.

InputScientificDecimalWhat it marks
12345671.234567e+61234567Large whole number
0.0001231.230000e-40.000123Small decimal
1.5e31.500000e+31500Typed in e form
−4.2e-2−4.200000e-2−0.042Negative mantissa
15001.500000e+31500Same value both ways
0.0011.000000e-30.001Thousandth
6.02e236.020000e+23602000000000000000000000Very large
1e-61.000000e-60.000001Very small

How to read the result

  • Scientific line

    Mantissa with six decimals, then e and the power of ten.

  • Decimal line

    Ordinary form, no commas, up to 15 significant digits.

  • Positive exponent

    1.500000e+3 means 1500.

  • Negative exponent

    1.000000e-3 means 0.001.

Frequently asked questions

  • What does this scientific notation converter show?

    Two forms of the same number. Scientific uses six digits after the decimal in the mantissa, such as 1.234567e+6 for 1234567. Decimal is the ordinary form without grouping commas, limited to 15 significant digits. Until you enter a finite value, both lines stay as “--.”

  • What is scientific notation on this page?

    A number written as a × 10^b, shown in e form. The mantissa a has one non-zero digit before the point when possible, and the exponent b is an integer. 0.000123 becomes 1.230000e-4. 1500 becomes 1.500000e+3.

  • Why does Scientific always show six decimals?

    The converter calls toExponential(6), so the mantissa always has six digits after the decimal point. 1.5e3 displays as 1.500000e+3, and π displays as 3.141593e+0.

  • Can I type scientific notation in the box?

    Yes. The field accepts text such as 1.5e3, 6.02e23, or −4.2e-2. The page parses that value, then shows both the scientific line and the decimal line. 1.5e3 becomes Scientific 1.500000e+3 and Decimal 1500.

  • What does the Decimal line mean?

    It is the same number written without an exponent and without thousands separators. 6.02e23 becomes 602000000000000000000000. 0.001 stays 0.001. Very long values may be limited to 15 significant digits.

  • What inputs are rejected?

    An empty field, or text that is not a finite number, leaves both results as “--.” Words, incomplete symbols, and non-numeric strings do not convert.

  • How do I read a positive or negative exponent?

    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. A negative sign on the mantissa means the whole value is negative: −4.200000e-2 is −0.042.

  • Does this change the true value of the number?

    Scientific and decimal are two displays of the same parsed value. Rounding can appear on the scientific line because of the fixed six-decimal mantissa, and the decimal line can stop at 15 significant digits for very precise inputs.

  • What about very large or very small numbers?

    Scientific notation is meant for those cases. 6.02e23 becomes 6.020000e+23. 1e-6 becomes 1.000000e-6 with Decimal 0.000001. Either form can be typed in the input.

  • Is e the same as × 10^?

    Yes in this display. 1.234567e+6 means 1.234567 × 10^6. 1.230000e-4 means 1.230000 × 10^−4. The e form is what the calculator prints.