Significant Figures Rounding Calculator
Round any number to a specific number of significant figures instantly.
Rounded Form1.23e+4
Rounding to Sig Figs
In science and engineering, you often must round your final answers to match the lowest precision (fewest significant figures) of your initial measurements.
Frequently Asked Questions
Why does my answer switch to scientific notation?
If you need to round "12345" to 3 sig figs, writing "12300" is ambiguous because trailing zeros without decimals aren't technically significant. Scientific notation (1.23 × 10⁴) removes this ambiguity.