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    Scientific Notation Converter

    Convert numbers to scientific notation and back with this free online converter. Get decimal, E-notation and engineering notation, and round to sig figs.

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    How to use Scientific Notation Converter

    1. 1Type a number in decimal form (0.000456) or scientific form (4.56e-4 or 4.56 × 10^-4)
    2. 2Optionally enter how many significant figures to round to
    3. 3Copy the scientific, E-notation, engineering or full decimal form

    Frequently asked questions

    How do you write a number in scientific notation?▾

    Move the decimal point until one non-zero digit is left of it, then multiply by 10 to the number of places moved: 45,600 = 4.56 × 10⁴ and 0.000456 = 4.56 × 10⁻⁴.

    What is E notation?▾

    A calculator and programming form of scientific notation where 'e' means '× 10 to the power': 6.022e23 = 6.022 × 10²³.

    What is engineering notation?▾

    Like scientific notation, but the exponent is always a multiple of 3 so it matches SI prefixes: 45,600 = 45.6 × 10³ (45.6 k) and 0.000456 = 456 × 10⁻⁶ (456 µ).

    Are trailing zeros kept?▾

    Yes. Digits you type are kept exactly, so 0.000045600 becomes 4.5600 × 10⁻⁵ with 5 significant figures. Use the sig figs box to round.

    Embed Scientific Notation Converter on your website▾

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