About this calculator
Enter a number in any form.
How to use it
- Type the number, plain or with e.
- Read every notation.
The formula
x = m × 10ⁿ, with 1 ≤ |m| < 10
- m
- mantissa
- n
- power of ten
Worked example
0.000045
- Move the decimal 5 places right: 4.5 × 10⁻⁵.
- E notation 4.5e-5; engineering 45 × 10⁻⁶.
What the result means
Engineering notation uses powers that are multiples of 3, matching kilo, mega and micro.
Assumptions
- Decimal numbers.
Limitations
- Very long numbers are rounded to 10 significant figures.
Frequently asked questions
What is 1,000,000 in scientific notation?
1 × 10⁶.
What does 3e8 mean?
3 × 10⁸, or 300,000,000.
What is engineering notation?
Like scientific notation, but with powers of 10 in steps of 3.
Last reviewed on 3 October 2026. Found a mistake? Tell us.