Welcome to the Significant Figures Calculator, also known as the Significant Digits Counter and Sig Figs Calculator.
The significant figures (significant digits) of a number are the digits in the number that are known with some degree of reliability.
Significant figures are digits greater than 0, zeros between digits that are greater than 0, and trailing zeros in a number with a decimal point. Leading zeros and trailing zeros in a number without a decimal point are not significant figures.
Use the Significant Figures Calculator below to determine how many significant figures a number has and what the significant figures are.
Here are some examples of what our Significant Figures Calculator can answer for you:
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