Significant Figures
Count sig figs, round to target precision, and apply multiplication precision rules. Free online calculator with formulas and step-by-step solutions.
About this tool
Count sig figs, round to target precision, and apply multiplication precision rules. Free online calculator with formulas and step-by-step solutions.
How to use this calculator
- Choose the correct mode or direction before entering numbers.
- Make sure your values match the expected units or date format shown in the fields.
- Calculate once, then read both the final output and the supporting formula steps.
- Round only after you understand the result so you do not lose useful precision too early.