Convert to scientific notation
Write a number as a coefficient whose absolute value is from 1 to 10 multiplied by an integer power of ten.
N = a × 10ⁿ, 1 ≤ |a| < 10
Scientific Notation Converter
Convert numbers to scientific, standard, or engineering notation and choose significant figures.
Version 1.0 · Last Updated: August 11, 2026 · Maintained by ToolLarder
Scientific notation, standard form, and engineering notation
Make very large or very small numbers readable with powers of ten. Expand scientific notation to standard form, use exponents divisible by three in engineering notation, and control significant figures.
Convert scientific notation to standard form
Move the decimal point right for a positive exponent or left for a negative exponent.
4.5 × 10⁻⁴ = 0.00045
Engineering notation
The exponent is always divisible by three, matching SI prefixes such as kilo, mega, micro, and nano.
123,000 = 123 × 10³
Round to significant figures
Preserve measurement precision by keeping a selected count of digits from the first nonzero digit.
12,345.6 → 4 figures → 1.235 × 10⁴
Very large and very small numbers
Powers of ten replace long strings of zeros, making values easier to read and compare.
0.000000001 = 1 × 10⁻⁹