How to calculate rounding
Round to nearest: look at the next digit — 5 or above rounds up.
Worked example. Rounded to 2 decimal places: 3.14.
Example inputs — Number: 3.14159; Round to: 2 decimal places. Starting values are illustrative.
From George Guju, founder of Calculyn · Educational calculator guidance, not professional advice.
How it works
Standard rounding: 5 or more rounds up. Also shows the number truncated down and up to 2 decimals for reference.
Assumptions & limitations
- Results are rounded for display.
Formula and assumptions reviewed October 2026 by the Calculyn team. How we build our calculators
Frequently asked questions
What are significant figures?
The digits that carry meaning: 0.004560 to 3 significant figures is 0.00456.