Scientific Notation Converter

Written byOleh Soloninupdated 5 October 2026

Value

Result

Scientific1.234567e+6
Decimal1234567

Between 6.022 × 10²³ and the full string of zeros

Scientific notation converter: turn 602,214,076,000,000,000,000,000 into 6.02214076 × 10²³ and back, expand e-notation like 1.5e-9 into digits, and see standard form for very large or very small numbers.

Scientific notation exists so that nobody has to count zeros. Writing the speed of light as 3 × 10⁸ m/s conveys the size instantly; writing 300000000 does not.

It also makes precision explicit. 3 × 10⁸ claims one significant figure, while 2.998 × 10⁸ claims four — the plain digits hide that distinction entirely.

How to use

Enter the number in ordinary form or in scientific notation — both are recognised.
Read the other form and the order of magnitude.
Check the exponent: it carries the scale, while the mantissa carries the precision.

Mantissa and exponent

Scientific notation splits a number into a mantissa between 1 and 10 and a power of ten: 1,234,567 becomes 1.234567 × 10⁶. The exponent carries the scale and the mantissa carries the precision, which is what makes the form so compact.

A negative exponent marks a number below one, so 0.00045 is 4.5 × 10⁻⁴. The same notation therefore fits stellar distances and molecular sizes alike, because the length of the written form no longer depends on the number of zeros.

Worked out with this calculator; software prints the same thing as 1.234567e+6.
Ordinary form	Scientific notation	Order
1,234,567	1.234567 × 10⁶	6
300,000,000	3 × 10⁸	8
0.00045	4.5 × 10⁻⁴	−4
6.022 × 10²³	6.022 × 10²³	23
1	1 × 10⁰	0

What this calculator shows

A number converted to standard scientific notation
E-notation expanded back into ordinary digits
Correct handling of negative exponents for very small values

What to keep in mind

Standard form keeps one non-zero digit before the decimal point.
Very large or very small values may hit the limits of floating-point precision.

FAQs

How do you convert a number to scientific notation?

Move the decimal point until exactly one non-zero digit is left in front of it, and count the moves: that count is the exponent, positive if you moved left, negative if you moved right. 45,000 becomes 4.5 × 10⁴; 0.00045 becomes 4.5 × 10⁻⁴.

What is 1 million in scientific notation?

1 × 10⁶ — a one followed by six zeros. A billion is 1 × 10⁹, a trillion 1 × 10¹², and a millionth is 1 × 10⁻⁶.

What does e mean in 1.5e-9?

'Times ten to the power of'. So 1.5e-9 is 1.5 × 10⁻⁹, or 0.0000000015.

How do I write 0.00045 in scientific notation?

4.5 × 10⁻⁴. The point moved four places right to turn 0.00045 into 4.5, so the exponent is −4; to get back to the original, move it four places left.

Why do calculators switch to this format on their own?

The screen runs out of room. How many digits fit depends on the calculator; once a number is longer than the display, notation is the only way to show all of it without truncating.

Does the exponent affect significant figures?

No, only the digits before the × do. 6.02 × 10²³ has three significant figures regardless of how big the exponent is.

Worked example

Avogadro's number

Input: 602214076000000000000000

Output: 6.02214076 × 10²³

Note: The decimal point moves twenty-three places, and a 24-digit number becomes a form you can actually read and compare.

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Scientific Notation Converter

Result

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