Scientific Notation Converter
Convert numbers to scientific notation or parse a scientific notation string back into a plain number. Free and private, right in your browser.
Number → Scientific notation
Scientific notation → Number
Convert any number between standard decimal form and scientific (e-notation) form instantly. Paste in a huge value like 6020000000000000000000 or a tiny one like 0.0000000167 and get the clean a × 10^n form, or go the other way from 3.2e8 back to 320000000.
How to use it
- Enter a number in standard, decimal, or e-notation form
- Choose the direction or format you want to convert to
- Read off the converted result, copy it, or adjust significant figures
Frequently asked questions
- How do I write a number like 0.00042 in scientific notation?
- Type 0.00042 into the decimal field and it converts instantly to 4.2 × 10⁻⁴ (or 4.2e-4). Negative exponents are handled automatically for small numbers.
- What's the difference between 4.2e-4 and 4.2 × 10⁻⁴?
- They're the same value written two ways: e-notation (used in calculators and code) and scientific notation (used in math and science writing). The tool converts between both formats and standard decimal form.
- Can I control how many significant figures are shown?
- Yes, you can set the number of significant digits so the coefficient rounds cleanly instead of showing long trailing decimals.
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Nothing is uploaded
The file never leaves your device. There is no server to send it to, so there is nothing to leak, log, or subpoena.
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No signup, no limits
No account, no email, no daily cap, no watermark, and no paid tier waiting behind the third file.
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Works offline
Load the page once and it keeps working with the network off, because all the work was always happening locally.