What is rounding to the nearest thousandth ?

Rounding to the nearest thousandth is the process of approximating a number to the closest value with three decimal places.

Why is rounding to the nearest thousandth important ?

It is essential for maintaining accuracy in various mathematical and scientific calculations where precision matters.

When should I round to the nearest thousandth ?

Round to the nearest thousandth when dealing with measurements or data that require a high degree of accuracy.

Formula

To round a number to the nearest thousandth, examine the digit in the fourth decimal place. If it is 5 or greater, round up the third decimal place. If it is less than 5, keep the third decimal place unchanged.

Round to the Nearest Thousandth = Third Decimal Place+0.001

Round to the Nearest Thousandth = Third Decimal Place+0.001 if the fourth decimal place is 5 or greater.

Examples: