Significant Figures Calculator
Count significant figures in any number and round to a desired precision. Learn the rules for determining significant figures.
Related Calculators
You might also find these calculators useful
Significant Figures Calculator - Count & Round
Count significant figures in any number and round to specified precision. Learn the rules for significant figures with detailed breakdowns. Essential for science, engineering, and laboratory work.
What are Significant Figures?
Significant figures (sig figs) indicate the precision of a measurement. They include all certain digits plus one uncertain digit. For example, 12.34 has 4 significant figures. Leading zeros are not significant (0.0025 has 2 sig figs), but trailing zeros after a decimal are significant (2.50 has 3 sig figs).
Significant Figures Rules
Non-zero digits + Captive zeros + Trailing zeros after decimalHow to Use This Calculator
Significant Figures Applications
Laboratory Science
Report measurements with appropriate precision.
Engineering
Ensure calculations reflect measurement accuracy.
Chemistry
Balance equations and report concentrations correctly.
Physics
Express experimental results with proper uncertainty.
Frequently Asked Questions
No. Leading zeros are placeholders and are not significant. For example, 0.0025 has only 2 significant figures (2 and 5).