Scientific Notation Calculator
Convert any decimal number to scientific notation (e.g., 0.000045 → 4.5 × 10⁻⁵) or convert scientific notation back to a standard decimal number.
How to use it
- Select the conversion direction: Decimal to Scientific Notation, or Scientific Notation to Decimal.
- Enter your number in the input field.
- Read the converted result instantly.
When Is Scientific Notation Used?
Scientific notation is used in physics, chemistry, astronomy, and engineering to express very large or very small numbers in a compact, readable form.
How to Read Scientific Notation
4.5e-5 means 4.5 × 10⁻⁵ = 0.000045. Negative exponent = smaller number (move decimal left). Positive exponent = larger number (move decimal right).
The formula
Frequently asked questions
What is scientific notation?
Scientific notation expresses numbers as a coefficient between 1 and 10 multiplied by a power of 10. Example: 93,000,000 miles = 9.3 × 10⁷ miles.
How do I convert 0.00056 to scientific notation?
Move the decimal right until you have a number between 1 and 10: 5.6. Count the moves: 4. Since you moved right, the exponent is negative: 5.6 × 10⁻⁴.
What does 1.5e10 mean?
1.5e10 = 1.5 × 10¹⁰ = 15,000,000,000 (15 billion).