Rounding and precision
Rounding is useful for reporting values, currency-style summaries and reducing false precision. Avoid using it too early in a multi-step calculation because early rounding can change the final answer.
Example
123.4567 rounded to 2 decimal places becomes 123.46 with nearest rounding. Rounding down to 2 places gives 123.45, while rounding up gives 123.46.
Common mistakes
Rounding up and rounding down are directional, not the same as rounding away from zero or toward zero in every case. Negative values need extra attention.
Limitations
This tool limits decimal places to a practical range for browser number precision. For accounting rules, follow the rounding policy required by the relevant standard or organization.
Last reviewed: 2026-05-17