Significant Figures Calculator – Sig Fig

Significant figures (or "sig figs") are the digits of a number that are meaningful in terms of accuracy or precision.

Rules for Counting Sig Figs:

• Rule 1: Non-zero digits are always significant. (e.g., 123 has 3 sig figs).
• Rule 2: Zeros between non-zero digits are significant. (e.g., 101 has 3 sig figs).
• Rule 3: Leading zeros are never significant. (e.g., 0.05 has 1 sig fig).
• Rule 4: Trailing zeros are significant only if the number contains a decimal point. (e.g., 12.00 has 4 sig figs, but 1200 only has 2).