Scientific Notation Converter
Convert decimal ↔ scientific notation, engineering notation, SI prefixes & science constants
Enter any positive or negative number
Significant Figures:
About Scientific Notation
What is Scientific Notation?
Scientific notation expresses numbers as a coefficient (1 ≤ |c| < 10) multiplied by a power of 10. For example, 299,792,458 m/s → 2.998 × 108.
Engineering Notation
Engineering notation restricts exponents to multiples of 3, aligning with SI prefixes (nano, micro, milli, kilo, mega, giga…). Widely used in electronics and physics.
Significant Figures
The coefficient in scientific notation controls precision. 3.00 × 108 has 3 significant figures while 3 × 108 has only 1. Choose sig figs to match your measurement precision.
E-notation
E-notation (2.998e8) is the computer-friendly version of scientific notation, used in programming languages, spreadsheets, and calculators.