CalcCommonsHow to use
Choose conversion or arithmetic, then enter a standard number without commas, an e-notation value, or a value written with × 10^. Arithmetic modes use both inputs. Calculate to see the normalized coefficient and exponent.
For related tasks, try the Percentage Calculator.
Formula & how it works
Scientific notation writes a nonzero number as a × 10ⁿ, with 1 ≤ |a| < 10. Multiply coefficients and add exponents for multiplication; divide coefficients and subtract exponents for division.
Worked examples
Example 1
123,000,000 = 1.23 × 10⁸. Enter 123000000 without grouping commas.
Example 2
0.00045 = 4.5 × 10⁻⁴. (2 × 10³) × (3 × 10⁻²) = 6 × 10¹ = 60.
Assumptions & practical notes
Inputs support 1.23e8 or 1.23 × 10^8. Zero is represented as 0 × 10^0.
Uses approximately 15–16 significant digits. Values outside finite JavaScript limits are rejected; very large or small standard forms remain in scientific notation.
See our calculation methodology for unit definitions and testing practices.
Frequently asked questions
Are big integers exact?
Not necessarily. This is a floating-point tool, not an arbitrary-precision integer calculator.
Can I use a negative exponent?
Yes. For example, 3e-5 means 0.00003.
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