Significant Figures Calculator
Count significant figures in a number based on standard rounding rules. Round any number to a target precision.
Complete User Guide
Enter a number to see its sig fig count and the specific rules applied. Set a target to round the value accordingly.
The Mathematical Formula
Analyzes leading, captive, and trailing zeros
1. Non-zeros significant. 2. Captive zeros significant. 3. Leading zeros NOT significant. 4. Trailing zeros ONLY significant if decimal exists.
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