Scientific Notation Converter

The Scientific Notation Converter rewrites a number in every form you are likely to need: standard scientific notation, E-notation, engineering notation and a plain decimal expansion.

Scientific notation expresses a value as a coefficient between one and ten times a power of ten, which keeps very large and very small numbers readable — the distance to the Sun becomes 1.496 × 10^8 kilometres instead of a long string of zeros, and the size of an atom becomes a tidy negative power of ten.

You can type the number however you have it.

Plain decimals like 149600000 or 0.0000042 work, as does E-notation such as 1.496e8, and even explicit "× 10^n" forms like 1.5 × 10^3 written with a multiplication sign, an "x" or an asterisk.

The converter normalises whatever you paste and shows the coefficient and exponent alongside each formatted variant.

Engineering notation is included too, where the exponent is always forced to a multiple of three (10^3, 10^6, 10^9), matching the SI prefixes kilo, mega and giga that engineers use.

Each output has its own copy button, and there is a one-click copy for the whole set.

Everything is computed locally in your browser using ordinary floating-point math, so nothing is uploaded or stored, and it keeps working offline once the page has loaded.