Online Significant Figures Counter
Count significant figures in a number and see the rules: leading zeros, trailing zeros, and which digits count.
Frequently Asked Questions
- What are the rules?
- Leading zeros never count. Zeros between digits count. Trailing zeros after a decimal count; in an integer they may be ambiguous.
- Why show rules?
- This tool shows the count plus a short reminder of the rules so you can verify.
- Same as significant-figures tool?
- Same counting logic; this one emphasizes the rules and explanation.
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