Scientific calculator.
Use this free scientific calculator to get fast estimates, compare scenarios, and understand the numbers with clear step-by-step context.
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About the Scientific Notation Calculator
This calculator converts a number into scientific notation — a compact way to write very large or very small numbers as a value between 1 and 10 multiplied by a power of ten. It also shows E-notation and engineering notation.
How it works
A number is written as m × 10ⁿ, where m (the mantissa) is between 1 and 10 and n (the exponent) counts how many places the decimal point moved. Engineering notation restricts the exponent to multiples of three.
Reading the result
The headline shows standard scientific notation, with E-notation (used by calculators and code) and engineering notation listed alongside.
Note: Calculations run instantly in your browser and use exact mathematical formulas. For very large numbers, results are shown to standard floating-point precision.
FAQ
What is E-notation?
A typing-friendly form of scientific notation: 4.52 × 10⁻⁶ is written 4.52e-6. It is what most calculators and programming languages display.
Why use scientific notation?
It makes extremely large or small numbers readable and reduces rounding errors when working across very different scales.
What is engineering notation?
A variant where the exponent is always a multiple of three, lining up with units like kilo, mega, milli, and micro.