Standard Form Calculator

Convert numbers to standard form (scientific notation). Express large or small numbers in a×10ⁿ format.

Number

Tab to move between fields

Standard Form

1.23 × 10^6

Mantissa1.23

Exponent6

How to Use This Calculator

Enter any number in the Number field — integers, decimals, and very large or very small values are all supported.
Standard form expresses the number as a × 10ⁿ where 1 ≤ |a| < 10 and n is an integer exponent.
The calculator also shows ordinary decimal form and, when applicable, engineering notation (exponent in multiples of 3).
Standard form is widely used in UK and Commonwealth science curricula; it is equivalent to scientific notation in the US.
Negative numbers are handled by carrying the sign on the coefficient (e.g., −3.5 × 10²).

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