Convert any number to scientific notation (a × 10b) and back to standard form. Works with very large and very small values, and shows E-notation too.
Enter a plain decimal number, with or without a sign.
Accepts E-notation (1.2e3) or the form 1.2 x 10^-4.
Results update as you type.
Scientific notation writes a number as a coefficient times a power of ten, in the form a × 10b, where the coefficient a has an absolute value of at least 1 but less than 10. For example, 0.00012 is written as 1.2 × 10−4.
Move the decimal point until exactly one non-zero digit is to its left, then count how many places you moved it. That count is the exponent: positive if you moved left, negative if you moved right. So 0.00012 becomes 1.2 × 10−4.
Multiply the coefficient by ten raised to the exponent. A positive exponent moves the decimal point right, a negative exponent moves it left. So 1.2e3 becomes 1200.