科学表記計算機

A scientific notation calculator is an online calculator that converts, compares, and solves numbers written in scientific notation, E notation, engineering notation, or standard decimal form.

Enter the first value, choose an operation, enter the second value, and click Calculate. The calculator accepts plain decimals, E notation, and x 10^ exponent format, then returns scientific notation, engineering notation, E notation, decimal output, and significant figures.

Choose Division, enter both values in scientific notation, E notation, or decimal form, and run the calculation. The calculator divides the coefficients, subtracts the exponents, and then rewrites the result in normalized scientific notation, engineering notation, and decimal form.

Significant figures are counted from the digits in the significand, not from the exponent. In 4.70 x 10^3, the value has 3 significant figures because the significand 4.70 has 3 significant digits.

Normalized scientific notation keeps the significand at least 1 and less than 10 in absolute value. A value such as 36.5 x 10^4 is valid mathematically, but the normalized form is 3.65 x 10^5.

Yes, scientific notation numbers can be negative. A negative sign can appear before the significand, and the exponent itself can be positive or negative depending on the size of the number.

Yes, values below 1 are common in scientific notation. A decimal such as 0.001 becomes 1 x 10^-3, and a decimal such as 0.0000725 becomes 7.25 x 10^-5.

Yes, the calculator returns a decimal output alongside scientific notation and engineering notation. That decimal output is the standard-form or real-number version of the result.

Compare the exponents first. The number with the greater exponent is larger when both values are positive. If the exponents match, compare the significands. For negative values, compare the signs first and then the magnitudes.

Engineering notation is a form of scientific notation that uses exponents in multiples of three. That format matches common SI prefix groupings such as kilo, mega, milli, and micro.

Yes, the calculator accepts inputs such as 1.2e5, 1.2 * 10^5, 0.001, and 6.4 x 10^-7. This makes it useful for conversion, comparison, and arithmetic across common calculator formats.

Yes, scientific calculators are accurate for ordinary scientific notation arithmetic when the input is valid. The displayed result depends on the calculator's precision settings and the number of digits shown to the user.