A scientific notation converter lets you instantly convert any number into scientific notation, E notation, engineering notation, and real number (decimal) format.
How to use the converter:
- Enter any number in the input field — integers, decimals, or numbers already in E notation (e.g.
1.5e6) - The converter instantly displays the result in all four formats
Output Formats
Scientific Notation
Expresses the number as a coefficient between 1 and 10 multiplied by a power of 10.
Format: a × 10^n where 1 ≤ |a| < 10
Example: 1500000 → 1.5 × 10^6
E Notation
A compact form of scientific notation commonly used in calculators and programming.
Format: aE+n
Example: 1500000 → 1.5E+6
Engineering Notation
Similar to scientific notation, but the exponent is always a multiple of 3 (aligned with SI prefixes like kilo, mega, giga).
Format: a × 10^n where n is a multiple of 3
Example: 1500000 → 1.5 × 10^6
Example: 15000 → 15 × 10^3
Real Number (Decimal)
The standard decimal representation of the number.
Example: 1.5E+6 → 1500000
Formulas
Scientific Notation:
Given a number x:
- Exponent:
n = floor(log₁₀(|x|)) - Coefficient:
a = x / 10^n - Result:
a × 10^n
Engineering Notation:
- Exponent:
n = floor(log₁₀(|x|) / 3) × 3 - Coefficient:
a = x / 10^n - Result:
a × 10^n
Examples
Example 1: Convert 1500000
- Scientific Notation:
1.5 × 10^6 - E Notation:
1.5E+6 - Engineering Notation:
1.5 × 10^6 - Real Number:
1500000
Example 2: Convert 0.00042
- Scientific Notation:
4.2 × 10^-4 - E Notation:
4.2E-4 - Engineering Notation:
420 × 10^-6 - Real Number:
0.00042
Example 3: Convert -93000000
- Scientific Notation:
-9.3 × 10^7 - E Notation:
-9.3E+7 - Engineering Notation:
-93 × 10^6 - Real Number:
-93000000
Key features include:
- Converts to all four notation formats simultaneously
- Handles positive and negative numbers
- Accepts decimal inputs and E notation inputs
- Instant results with no button press required
- Works on desktop, tablet, and mobile