Significant Figures Calculator
Round numbers to the correct number of significant figures for scientific accuracy.
Embed this toolCurrent Sig Figs
6
Rounded to 3 Sig Figs
3.14
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Significant Figures Rules
Significant figures communicate the precision of measurements. Following these rules ensures your calculations reflect the true accuracy of your data.
The Rules
- Non-zero digits are always significant.
- Zeros between non-zero digits are significant (e.g., 1005 has 4 sig figs).
- Leading zeros are never significant (e.g., 0.0045 has 2 sig figs).
- Trailing zeros after a decimal are significant (e.g., 3.500 has 4 sig figs).
- Trailing zeros in an integer are ambiguous without scientific notation.
Frequently Asked Questions
Significant figures (sig figs) are the digits in a number that carry meaning and contribute to its precision. They include all non-zero digits, zeros between non-zero digits, and trailing zeros after a decimal point.
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