Significant Figures & Rounding Calculator
Count significant digits, convert scientific notation, and round numbers with clear precision rules.
Rounding mode is focused on decimal-place and place-value rounding; choose the target precision before comparing results.
Notation Analysis Results
45.68Rounded Output
Method:
Rounded to 2 decimal places.
Frequently Asked Questions
What is scientific notation?
Scientific notation expresses very large or very small numbers as a × 10^b, where 1 ≤ |a| < 10.
Are trailing zeros significant?
Trailing zeros are significant only if there is a decimal point. For example, 4500 has 2 significant figures, but 4500.0 has 5 significant figures.