Significant figures: Learn what significant figures are

Learn what significant figures are and how to count, round off, and apply them in math and science. Find out the rules for zeros, decimal points, and significant digits in numbers and measurements. Learn how to round numbers to a specified number of significant figures with this online tool. Enter whole numbers, real numbers, scientific notation or e notation and get the answer with rules and examples. Significant Figures Appropriate number of significant data is important in order to have a meaningful level of power-resolution when reporting analytical concentrations. Various methods or parameters can be used to determine how many significant figures are required. In most cases, three key figures are sufficient. Learn about significant figures , their rules, and how to use them in calculations. Explore definitions, examples, and FAQs in this simple and clear guide.