Rounding Calculator

Use our Rounding Calculator to quickly round any number to the nearest whole number, tenth, hundredth, thousandth or ten-thousandth. Simply enter your number and select your preferred rounding option. Our easy-to-use calculator will provide you with accurate results in seconds.
Rounding Calculator

Rounding Calculator

​Why do we round numbers?

We round numbers to make them easier to work with, especially when dealing with large numbers or calculations. Rounding helps us to simplify numbers to a more manageable level, making it easier to interpret and understand numerical data.
rounding calculator page visual

Real-world Applications of Rounding

Rounding is used in many real-world applications, such as in finance, science, and engineering. For example, when calculating the distance between two points on a map or when measuring the weight of an object, we might need to round our results to a certain degree of accuracy. You can use our rounding calculator to round off any number with any of the methods listed below.
​
Now, let's take a closer look at each of the different rounding methods.

Rounding to the Nearest Whole Number

Rounding to the nearest whole number is the simplest form of rounding. In this method, we round a number to the nearest integer. For example, if we have the number 3.4, we would round it down to 3, and if we have the number 3.6, we would round it up to 4.
When rounding up or down to the nearest whole number, we follow a set of rules. If the decimal part of the number is greater than or equal to 0.5, we round up to the next integer. If the decimal part of the number is less than 0.5, we round down to the previous integer.

Rounding to the Nearest Tenth

Rounding to the nearest tenth involves rounding a number to the nearest tenth of a unit. For example, if we have the number 3.42, we would round it to 3.4, and if we have the number 3.46, we would round it to 3.5.
When rounding up or down to the nearest tenth, we follow a set of rules. If the second decimal place of the number is greater than or equal to 5, we round up to the next tenth. If the second decimal place of the number is less than 5, we round down to the previous tenth.

Rounding to the Nearest Hundredth

Rounding to the nearest hundredth involves rounding a number to the nearest hundredth of a unit. For example, if we have the number 3.456, we would round it to 3.46, and if we have the number 3.451, we would round it to 3.45.
When rounding up or down to the nearest hundredth, we follow a set of rules. If the third decimal place of the number is greater than or equal to 5, we round up to the next hundredth. If the third decimal place of the number is less than 5, we round down to the previous hundredth.

Rounding to the Nearest Thousandth

Rounding to the nearest thousandth involves rounding a number to the nearest thousandth of a unit. For example, if we have the number 3.4567, we would round it to 3.457, and if we have the number 3.4562, we would round it to 3.456.
When rounding up or down to the nearest thousandth, we follow a set of rules. If the fourth decimal place of the number is greater than or equal to 5, we round up to the next thousandth. If the fourth decimal place of the number is less than 5, we round down to the previous thousandth.

Rounding to the Nearest Ten

Rounding to the nearest ten involves rounding a number to the nearest ten units. For example, if we have the number 34, we would round it to 30, and if we have the number 37, we would round it to 40.
When rounding up or down to the nearest ten, we follow a set of rules. If the units digit of the number is greater than or equal to 5, we round up to the next ten. If the units digit of the number is less than 5, we round down to the previous ten.

Rounding to the Nearest Hundred

Rounding to the nearest hundred involves rounding a number to the nearest hundred units. For example, if we have the number 341, we would round it to 300, and if we have the number 347, we would round it to 400.
When rounding up or down to the nearest hundred, we follow a set of rules. If the tens digit of the number is greater than or equal to 5, we round up to the next hundred. If the tens digit of the number is less than 5, we round down to the previous hundred.

Rounding to the Nearest Thousand

Rounding to the nearest thousand involves rounding a number to the nearest thousand units. For example, if we have the number 3,417, we would round it to 3,000, and if we have the number 3,427, we would round it to 3,000.
When rounding up or down to the nearest thousand, we follow a set of rules. If the hundreds digit of the number is greater than or equal to 5, we round up to the next thousand. If the hundreds digit of the number is less than 5, we round down to the previous thousand.

Rounding to the Nearest Ten Thousand

Rounding to the nearest ten thousand involves rounding a number to the nearest ten thousand units. For example, if we have the number 34,170, we would round it to 30,000, and if we have the number 34,270, we would round it to 40,000.
When rounding up or down to the nearest ten thousand, we follow a set of rules. If the thousands digit of the number is greater than or equal to 5, we round up to the next ten thousand. If the thousands digit of the number is less than 5, we round down to the previous ten thousand.
Rounding numbers is a useful tool that simplifies numerical data and makes it easier to work with. By following the rules for rounding up or down, we can round numbers to a specified level of accuracy, making them more manageable for use in real-world applications. Knowing how to round numbers is an important skill that is used in many fields, including finance, science, and engineering, and it's a skill that every 8th grader can master with a little practice.
Here are some frequently asked questions on rounding numbers. Again if you need a quick calculation scroll up to our rounding calculator. 

Rounding FAQs


Here are some frequently asked questions on rounding numbers. Again if you need a quick calculation scroll up to our rounding calculator.

What is the purpose of rounding numbers?

The purpose of rounding numbers is to simplify them and make them easier to work with. Rounding allows us to express numbers in a more manageable form, especially when dealing with large numbers or calculations.

What are the different methods of rounding numbers?

There are several methods for rounding numbers, including rounding to the nearest whole number, rounding to the nearest tenth, rounding to the nearest hundredth, and rounding to the nearest thousandth. Each method has its own set of rules for determining whether to round up or down.

How do I know whether to round up or down?

To determine whether to round up or down, you need to look at the digit immediately to the right of the place you are rounding to. If this digit is 5 or greater, you round up. If it is less than 5, you round down.

How do I round a number to a certain number of decimal places?

To round a number to a certain number of decimal places, you need to look at the digit in the place you want to round to, as well as the digit immediately to its right. If the digit in the place you want to round to is 5 or greater, you round up. If it is less than 5, you round down. You then truncate any remaining digits to the right of the rounded digit.

Can you round negative numbers?

Yes, you can round negative numbers just like positive numbers. Simply follow the same rules for rounding up or down based on the digit in the place you are rounding to.

Why is it important to be precise when rounding numbers?

Precision is important when rounding numbers because even small errors can compound over time, especially in calculations that involve many numbers. It's important to round to an appropriate level of accuracy based on the context of the problem you're trying to solve.

How do I round numbers in Excel?

To round numbers in Excel, you can use the ROUND function. The syntax for this function is as follows: =ROUND(number,num_digits). The first argument is the number you want to round, and the second argument is the number of decimal places you want to round to.
​
Below you can find few rounding examples. If you want to practice round off calculation you can go to the top of this page and use our rounding calculator.
 
Rounding to the nearest whole number:
  • 2.4 rounded to the nearest whole number is 2.
  • 6.9 rounded to the nearest whole number is 7.
Rounding to the nearest tenth:
  • 3.45 rounded to the nearest tenth is 3.5.
  • 9.73 rounded to the nearest tenth is 9.7.
Rounding to the nearest hundredth:
  • 5.678 rounded to the nearest hundredth is 5.68.
  • 3.112 rounded to the nearest hundredth is 3.11.
Rounding to the nearest thousandth:
  • 8.6789 rounded to the nearest thousandth is 8.679.
  • 1.2345 rounded to the nearest thousandth is 1.235.
Rounding to the nearest ten:
  • 43 rounded to the nearest ten is 40.
  • 58 rounded to the nearest ten is 60.
Rounding to the nearest hundred:
  • 327 rounded to the nearest hundred is 300.
  • 865 rounded to the nearest hundred is 900.
Rounding to the nearest thousand:
  • 5,432 rounded to the nearest thousand is 5,000.
  • 9,865 rounded to the nearest thousand is 10,000.