Our Scientific Notation Calculator makes it easy to convert numbers between standard decimal form and scientific notation. Whether you are working with very large values like the speed of light or extremely small numbers in chemistry and physics, this tool helps you quickly express them in the normalized scientific form (mantissa × 10^exponent). You can also set the number of significant figures, view decimal expansion, and copy results instantly. Perfect for students, teachers, engineers, and anyone who needs accurate number conversions in mathematics and science.