Scientific Notation ↔ Standard Form
Convert numbers between scientific notation (e.g. 3.14 × 10⁵) and standard decimal form. Supports very large and small numbers.
Standard Number
Scientific Notation
× 10
💡 Definition
Scientific Notation
- Scientific notation expresses numbers as a coefficient times a power of 10: a × 10ⁿ.
- The coefficient is between 1 and 10.
- It's used for very large numbers (speed of light: 3 × 10⁸ m/s) and very small numbers (electron mass: 9.109 × 10⁻³¹ kg).
📖 How to use
Step by Step
- Enter a standard number on the left
- Or enter coefficient and exponent on the right
- The formatted display shows both notations
- Copy either format with the buttons below
🎯 Use cases
When to use
- Physics and chemistry calculations
- Astronomy (distances in light-years)
- Engineering (very precise measurements)
- Computer science (floating-point understanding)
Frequently Asked Questions
What is E-notation?▾
E-notation is how computers write scientific notation: 3.14E5 means 3.14 × 10⁵ = 314000. The E stands for 'exponent'. JavaScript's toExponential() uses this format.
What are significant figures?▾
The coefficient's digits are the significant figures. In 3.14 × 10⁵, there are 3 significant figures. More digits = more precision.