Everyday utility

Rounding Calculator

Round any number to a specified number of decimal places, significant figures, or a custom increment. Use this Data and utilities tool to enter your numbers, review the result, and understand the key assumptions before making the next decision.

What you get
A focused calculator, clear explanation, common questions, and useful next tools.
Quick intro
Calculator
Result
Explanation
Common questions
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Calculator tool

How this calculator works
The result depends on the numbers you enter and the assumptions shown below.

Standard rounding: if the digit after the rounding position is ≥5, round up; if <5, round down. Banker's rounding rounds 0.5 to the nearest even digit. Scientific work often uses significant figures.

Review the inputs carefully and treat the output as an estimate. For decisions involving money, taxes, health, law, or security, compare the result with trusted professional guidance when needed.

Frequently asked questions

What are significant figures?

Significant figures are the meaningful digits in a number. 3.140 has 4 significant figures; 0.00142 has 3. Leading zeros don't count; trailing zeros after the decimal do.