Rounding Calculator
Round a Number
Significant Figures
Round to a specified number of significant figures
Formula
Round(x, n) = floor(x × 10^n + 0.5) / 10^n
Frequently Asked Questions
What is rounding?
Rounding replaces a number with an approximate value. The rule: if the digit after your rounding position is 5 or more, round up; otherwise, round down. 3.456 rounded to 2 places = 3.46.
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