Convert numbers to and from scientific and engineering notation.
Move the decimal point until one non-zero digit remains in front, and count the moves as the power of 10. 123,456 becomes 1.23456 × 10^5.
Scientific notation writes very large or very small numbers compactly as a × 10ᵇ, where a is between 1 and 10. This converter turns any decimal number or E-notation input into scientific notation, E-notation and engineering notation (exponent a multiple of 3), and the second tool converts a coefficient and exponent back into a plain decimal.
Scientific notation is used in physics, chemistry and engineering. For rounding the coefficient use the Rounding Calculator, and for powers of ten see the Exponent Calculator. The Scientific Calculator accepts E-notation too.
The calculator applies the standard method step by step.
| Item | Value |
|---|---|
| Scientific notation | 1.23456 × 10^5 |
| E-notation | 1.23456E5 |
| Engineering notation | 123.456 × 10^3 |
| Decimal form | 123456 |
| Significant digits (ignoring trailing zeros) | 6 |
| Order of magnitude | 10^5 |
| Number | Scientific notation |
|---|---|
| 123456 | 1.23456 × 10^5 |
| 0.00045 | 4.5 × 10^-4 |
| 6.02e23 | 6.02 × 10^23 |
| -1500 | −1.5 × 10^3 |
| 299792458 | 2.99792458 × 10^8 |
| Power | Value | Prefix | Symbol |
|---|---|---|---|
| 10⁻⁹ | 0.000000001 | nano | n |
| 10⁻⁶ | 0.000001 | micro | µ |
| 10⁻³ | 0.001 | milli | m |
| 10³ | 1,000 | kilo | k |
| 10⁶ | 1,000,000 | mega | M |
| 10⁹ | 1,000,000,000 | giga | G |
| 10¹² | 1,000,000,000,000 | tera | T |
A way of writing numbers as a coefficient between 1 and 10 multiplied by a power of ten, such as 6.02 × 10²³.
Move the decimal point to the right until one non-zero digit is in front; the exponent is negative. 0.00045 = 4.5 × 10⁻⁴.
A calculator-friendly form: 1.23E5 means 1.23 × 10⁵.
Scientific notation where the exponent is a multiple of 3 (matching SI prefixes like kilo and milli): 12,345,678 = 12.345678 × 10⁶.
Move the decimal point right for a positive exponent and left for a negative one, adding zeros. 3.2 × 10⁴ = 32,000.
It keeps very large or small numbers readable and makes it clear how many significant figures are meaningful.
It uses the standard method: x = a × 10ᵇ, with 1 ≤ |a| < 10 The full working and a worked example are shown on this page.
Decimal results use standard double-precision arithmetic (about 15–16 significant digits). Tools that work with whole numbers — big numbers, factors, bases, combinations — use exact integer arithmetic, so no digits are lost.
Yes for checking your work and learning the method. The steps and formula are shown so you can understand the answer, but follow your teacher's rules about calculators in exams.
No. Everything is calculated in your browser and nothing you enter is uploaded or saved.
