TopToolsAiConvert any number to scientific notation, E-notation, engineering notation and standard decimal form, with the decimal shifting explained step by step. You can also round to a chosen number of significant figures.
Last updated: 21 Sep 2026
How to use Scientific Notation Converter
- Enter a number such as 45000, 0.00072 or 3.2e5. You can also type 3.2 x 10^5.
- Optionally enter how many significant figures to keep.
- Click Convert to see every notation and the steps.
Frequently asked questions
What is scientific notation?
A way to write very large or very small numbers as a × 10ⁿ, where a is at least 1 and less than 10 and n is a whole number. For example, 45,000 = 4.5 × 10⁴.
What is engineering notation?
It is like scientific notation, but the exponent is always a multiple of 3, for example 45 × 10³. It lines up with metric prefixes such as kilo, mega and milli.
Is this calculator free to use?
Yes, it is completely free, with no signup or account required.
Does my data get uploaded anywhere?
No. Everything is calculated in your browser and nothing is sent to our servers.
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