Convert standard decimal numbers to scientific notation, or expand E notation back into standard form. The tool automatically handles zero-padding and exponent math as you type.
Number to scientific notation
Set the input mode to Number to convert plain decimals (like 123000 or 0.00045) into scientific notation (1.23e5 and 4.5e-4). The tool normalizes signs, decimals, and ignores visual separators like underscores before shifting the digits.
You can set the significant digits from 1 to 20, which controls the rounding of the final coefficient. If you prefer capital letters for system compatibility, turn on the Uppercase E option to generate 1.23E5 instead of 1.23e5.
Expanding E notation
Set the input mode to Scientific to decode values back to plain numbers. Input like 1.23e5 instantly expands into 123000. By default, the tool removes any trailing fractional zeros, but you can turn off Trim output zeros to preserve them if they carry meaning in your data.
Batch processing
Turn on Batch by newline to parse a large list of numbers at once. The converter evaluates each line independently, allowing you to paste directly from a spreadsheet or log file. If a specific line fails to parse, the tool outputs an error message on that line but continues processing the rest.