Significant Figures Calculator

Significant figures (sig figs) are the meaningful digits in a number that contribute to its precision. They include all non-zero digits, zeros between non-zero digits, and trailing zeros after a decimal point.

Trailing zeros after a decimal point are significant (e.g., 2.50 has 3 sig figs). Trailing zeros without a decimal point are ambiguous (e.g., 2500 could have 2, 3, or 4 sig figs).