🔬 Scientific Notation Calculator
Very large and very small numbers are easier to read in scientific notation. Enter a number in normal or E form (like 6.02e23).
Scientific notation
How the Scientific Notation Calculator works
The decimal point is moved until one non-zero digit is left of it. The number of places moved becomes the power of 10 — positive for big numbers, negative for small ones.
x = a × 10ⁿ, where 1 ≤ |a| < 10
299,792,458 = 2.99792458 × 10⁸
0.000452 = 4.52 × 10⁻⁴
Step-by-step calculation
- 1Enter the number.
- 2Move the decimal until one digit is left of it.
- 3Count the moves as the power of 10.
Worked example
The speed of light, 299,792,458 m/s, is 2.99792458 × 10⁸ (E notation 2.99792458e8).
Scientific Notation Calculator examples
| Number | Scientific notation |
|---|---|
| 149,896,229 | 1.49896229 × 10^8 |
| 224,844,344 | 2.24844344 × 10^8 |
| 299,792,458 | 2.99792458 × 10^8 |
| 374,740,573 | 3.74740573 × 10^8 |
| 449,688,687 | 4.49688687 × 10^8 |
Other inputs kept at the calculator's default values. Results calculated by this calculator.
Why use a Scientific Notation Calculator?
Write very large or small numbers clearly.
Important factors that can affect your results
- Significant figures.
- Negative exponents for small numbers.
- E notation in calculators.
Frequently asked questions
What is E notation?
A computer-friendly form: 3e8 means 3 × 10⁸.
How many significant figures?
Count digits from the first non-zero digit; trailing zeros in a whole number may or may not be significant.
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Last reviewed November 2026 · How we build and check our tools · Report a problem