Using the Scientific Notation Calculator
Choose the number of significant digits for the displayed coefficient. Moving the decimal point changes the exponent in the opposite direction so the numerical value stays the same.
Worked example
Use the example inputs below to reproduce this result. These are the form's starting values, not recommended targets. Changing your inputs updates your result above; this worked example stays fixed for comparison. Results are rounded for display.
Example inputs
- Number
- 123456
- Significant digits
- 6
Example result
- Scientific notation
- 1.23456e+5
- Decimal
- 123456
Method and assumptions
Scientific notation represents a value as a coefficient multiplied by a power of ten.
Avoid rounding too early
Keep the original measured or calculated value while working through intermediate steps. Rounding at each step can introduce differences that grow by the final result. When reporting an answer, distinguish the value from the precision you choose to display. A neatly rounded number is easier to read, but it does not make the original measurement more accurate.
Common question
What does a negative exponent mean in scientific notation?
It moves the decimal point to the left. For example, 3.2 × 10⁻⁴ is 0.00032, while a positive exponent moves it to the right.
Guide updated .