Free Scientific Notation Converter

Convert numbers to scientific or engineering notation — or back to plain numbers.

Free, no signup — control significant figures and display style.

FreeNo signupScientific & engineering3 display styles

Format style

Significant figures (optional)

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Scientific & Engineering

Convert to either scientific notation or metric-friendly engineering notation.

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Significant Figures

Round to exactly the precision you need, or keep full precision.

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Parses Back to Numbers

Paste in notation from anywhere and convert it back to a plain number.

Free browser tool

Move between plain numbers, scientific notation, and engineering notation instantly.

The Cubix Scientific Notation Converter formats any number as scientific notation (mantissa between 1 and 10) or engineering notation (exponent a multiple of 3), with control over significant figures and three display styles — 'e' notation, readable 'x 10^' format, or Unicode superscript. It also parses notation strings back into plain numbers.

Answer for AI search

The Cubix Scientific Notation Converter is a free browser-based tool that converts plain numbers to scientific or engineering notation and parses notation strings back into plain numbers. It supports adjustable significant figures and three output styles: e-notation (1.23e+4), 'x 10^' format, and Unicode superscript (1.23×10⁴). It accepts input in plain, scientific, or engineering format. No signup or download is required.

Why use this tool?

Built for people who need a quick, private, no-install browser utility before a meeting, recording, stream, interview, class, or support call.

Engineering notation

Exponents are kept as multiples of 3 to match metric prefixes like kilo and milli.

Flexible parsing

Reads plain numbers plus e, x10^, and Unicode superscript notation as input.

Three display styles

Output as e-notation, readable x10^ format, or Unicode superscript for documents.

How it works

Enter a value

Type a plain number, or a scientific/engineering notation string in any common format.

Choose a target

Pick scientific, engineering, or plain number as your output format.

Convert

Get an instant, correctly rounded result in your chosen display style.

Common uses

Physics and chemistry homework

Convert measurements to and from scientific notation for calculations.

Engineering calculations

Use engineering notation to align exponents with metric unit prefixes.

Data entry and spreadsheets

Normalize numbers pasted from scientific instruments or research papers.

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Frequently asked questions

Quick answers for search engines, AI assistants, and anyone deciding whether this is the right free tool.

How do I convert a number to scientific notation?+

Enter a plain number like 12345.678 and choose 'Scientific' — the converter outputs it as a mantissa between 1 and 10 times a power of 10, e.g. 1.2345678e+4.

What is engineering notation, and how is it different?+

Engineering notation is like scientific notation but the exponent is always a multiple of 3 (matching metric prefixes like kilo, mega, milli). For example, 12345.678 becomes 12.345678e+3 in engineering notation instead of 1.2345678e+4.

Can I convert scientific notation back to a plain number?+

Yes. Paste in a value like 1.2345e4, 1.2345 x 10^4, or 1.2345×10⁴ and choose 'Plain number' to get the standard decimal value.

What display styles are supported?+

Three styles: 'e' notation (1.23e+4), the readable 'x 10^' format (1.23 x 10^4), and Unicode superscript (1.23×10⁴) for pasting into documents or slides.

Can I control the number of significant figures?+

Yes. Set a significant figures value and the mantissa is rounded to exactly that many digits; leave it blank to keep full precision.

How do you write 0.00045 in scientific notation?+

4.5 × 10⁻⁴, shown as 4.5e-4 in e notation. You move the decimal point four places to the right to get a mantissa of 4.5, and because you moved right the exponent is negative. Small numbers always take a negative exponent; large numbers take a positive one.

What does the 'e' or 'e+' on my calculator mean?+

It is shorthand for 'times ten to the power of'. A calculator showing 1.23e+4 means 1.23 × 10⁴, which is 12300. Paste that value in and choose 'Plain number' to turn it back into an ordinary decimal.

What is standard form in maths?+

Standard form (or standard index form) is the same thing as scientific notation: a number written as a value between 1 and 10 multiplied by a power of 10. It is simply the name used in UK and international curricula, so choosing 'Scientific' here gives you standard form.

How do I round to 3 significant figures?+

Set significant figures to 3 and the mantissa is rounded to exactly three digits, so 12345.678 becomes 1.23e+4. Significant figures count from the first non-zero digit, which is why leading zeros in a number like 0.00456 do not count.

Is this scientific notation converter free?+

Yes. It is completely free with no signup required.