E notation to decimal converter
Paste the number exactly as your calculator or spreadsheet shows it to see its full value and its usual scientific form.
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Processing and privacy: The result is calculated inside your browser and your data is not sent to any server.
How to use it
- Enter number in e notation.
- The result appears straight away and updates as you edit.
- Copy the result, or copy a link that keeps the same values to share it.
How it is calculated
aEn means a × 10ⁿ. The decimal point of a moves n places and zeros are filled in, with no approximate float arithmetic.
Example
Inputs: Number in E notation = 1.6E-19. Result: Decimal number: 0.00000000000000000016.
1.6E-19
0.00000000000000000016
Limits and caveats
- Exponents beyond about ±1000 are refused and should stay in scientific form.
- A comma is treated as a thousands separator, so write decimals with a dot.
Questions about this tool
Why does Excel show 1.23E+15?
The cell is too narrow for the full number, so it uses E notation. The value is 1.23 × 10¹⁵, or 1,230,000,000,000,000.
What does e-7 mean in a number?
It means multiply by 10⁻⁷, that is, move the decimal point 7 places to the left.
Is uppercase E the same as lowercase e?
Yes. 1.6E-19 and 1.6e-19 are the same number, and a + after the E is optional.