Significant Figures Calculator
Round a value to a chosen number of significant figures.
Calculations run in this browser. Values are not submitted to the server.
Result
Formula and assumptions
Rounds the parsed numeric value to the requested significant figures (1–15). Use scientific notation to preserve significant trailing zeroes in the input.
Example values are shown in the input placeholders. Results use browser number precision unless the tool uses exact integer arithmetic. Check units and assumptions before using a result.