CalculatorHand-checked fixturesFull working shown
Significant Figures Calculator
Count the significant figures in any measurement — and round it correctly, with every rule explained.
Calculator
Results update as you type. Every step of the working is shown below.
Examples:
Result
Enter values above — the answer appears here instantly, with full working.
Formula used
rules: nonzero count · captive zeros count · leading zeros don’t · trailing zeros need a decimal point
Every result substitutes your values into this relation step by step above.
Assumptions
- Standard textbook convention; ambiguous cases are flagged, never silently resolved.