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Math — Notation

Scientific Notation Calculator

Convert any number to and from scientific notation, with the coefficient and exponent.

Filed by The Statistics Desk  |  Method: coefficient × 10^exponent
decimal or e-notation, e.g. 4.2e-4
Scientific notation
—
Coefficient × 10 to a power.
Readout
E-notation—
Decimal—
Coefficient—
Exponent—
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How the Scientific Notation Calculator Works

Scientific notation writes any number as a coefficient between 1 and 10 multiplied by a power of ten. It makes very large and very small numbers manageable — 0.00042 becomes 4.2 × 10−4, and 93,000,000 becomes 9.3 × 107. The exponent simply counts how many places the decimal point moves.

Enter a number in ordinary decimal form or in e-notation (like 4.2e-4). The calculator finds the exponent as the floor of the base-10 logarithm of the number, divides by that power of ten to get the coefficient, and shows the result in proper scientific form, e-notation and plain decimal.

x = coefficient × 10exponent,  1 ≤ |coefficient| < 10

Frequently Asked Questions

How do I convert a number to scientific notation?

Move the decimal point until one non-zero digit remains to its left; that gives the coefficient. The number of places you moved it is the exponent — positive for large numbers, negative for small ones.

What is e-notation?

E-notation is how calculators and computers write scientific notation: 4.2e-4 means 4.2 × 10⁻⁴. The number after the e is the exponent.

Why use scientific notation?

It keeps very large or very small numbers compact and makes their size easy to compare at a glance by looking at the exponent, which is why it is standard in science and engineering.

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