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Scientific Notation Converter
Rewrite very large and very small numbers as ×10 powers. Everything happens on this page, in your browser — nothing you enter is sent anywhere.
Scientific notation keeps one non-zero digit before the decimal point; the exponent then counts how many places the point travelled — right for large numbers (positive), left for small ones (negative).
How this tool works
Scientific notation is a pact between writer and reader: write the significant digits once, then let a power of ten carry the size. It exists because 0.00000000000016 invites copying errors and 1.6 × 10⁻¹³ does not.
Using it, step by step
- For an ordinary number, type it in full — very long numbers are welcome.
- For the reverse, enter the coefficient (the number before the ×) and the exponent separately.
- Check the exponent's sign before you trust your eye: positive moves the decimal point right, negative moves it left.
Where it stops
This converter works in decimal throughout. Engineering notation — exponents in steps of three to match kilo, mega, milli — follows the same idea with different packaging, and very long inputs are rounded to a sensible number of significant figures rather than printed to fifty digits.