Skip to content

Scientific Notation Converter

Convert numbers to and from scientific, E and engineering notation, exactly.

A decimal (0.000345), E notation (3.45e-4) or scientific notation (3.45 × 10^-4).

Result

Scientific notation

3.45 × 10-4

E notation
3.45e-4
Engineering notation
345 × 10-6
Decimal
0.000345

Runs in your browser — nothing you enter is sent to a server.

How the Scientific Notation Converter works

Type any number — a long decimal, E notation such as 6.022e23, or scientific notation such as 3.45 × 10^-4 — and see it in scientific notation, E notation, engineering notation (powers of ten in multiples of 3) and as a full decimal. The conversion works on the digits themselves, so nothing is rounded.

Formula

a × 10n, with 1 ≤ |a| < 10 and n a whole number

Examples

0.000345

3.45 × 10⁻⁴ (E notation 3.45e-4; engineering 345 × 10⁻⁶).

Avogadro's number

6.022e23 written out is 602,200,000,000,000,000,000,000.

Frequently asked questions

What is engineering notation?

Like scientific notation, but the exponent is a multiple of 3 so it matches unit prefixes: 123,456 = 123.456 × 10³ (kilo).

Is standard form the same thing?

Yes — in the UK, “standard form” means scientific notation.

How precise is it?

Exact: every digit you type is kept.

Related tools

Scientific Calculator

An online scientific calculator with trigonometry, logarithms, powers, roots, factorials and history.

Math Tools

Number to Words Converter

Write numbers out in English words, as check amounts, or as ordinals like “twenty-first”.

Converters