Significant Figures Calculator
How to count significant figures
- Type a number, such as 0.004560 or 1.20e5.
- The count of significant figures appears.
- Choose how many to round to.
Frequently asked questions
Which zeros count?
Zeros between digits always count, leading zeros never do, and trailing zeros count only when there is a decimal point. In 1200 they are ambiguous; write 1.200e3 to show four.
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