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Integer rounder

World's simplest integer tool

This browser-based application rounds one or more integers and returns their approximated values in the output. You can adjust the rounding precision in the options and round integers to ones, tens, hundreds, thousands, or any other place value. You can also switch between rounding methods and round integers up, down, to the nearest integer, or to the nearest half. Created by math nerds from team Browserling.
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Rounding Methods
Rounding up towards the nearest larger integer.
Rounding down towards the nearest smaller integer.
Rounding towards closest integer.
Rounding to the nearest digit 5 or 0.
Rounding Examples
Round Up (Ceil): 186 → 190 143 → 150
Round Down (Floor): 186 → 180 143 → 140
Round to Nearest Integer: 186 → 190 143 → 140
Round to a Half: 186 → 200 143 → 150
Rounding Precision
Round integers to this place value.
Set the custom precision here.
The custom rounding precision should be a power of ten, such as 100 (to round to hundreds), 1000 (thousands), 10000, etc.
Integer rounder tool What is a integer rounder?
With this quick webapp, you can round off integers to ones, tens, hundreds, thousands, and more place values. Rounding an integer makes it simpler to interpret and work with as the less significant digits (on the right side) are turned into zeros. For example, you can round the integer 521 to tens and get 520, or round the value 2590 to hundreds and get 2600. These two examples use a rounding method that is called "Round to the Nearest Integer". As you can see in the first case after rounding, the digit 2 (in tens position) remained as it was but the digit 1 (in unit position) got dropped and converted to 0. In the second integer, the digit 5 (in hundreds position) was turned into the digit 6 and digits in tens and ones positions got dropped. The rounding in these examples followed this rule – if the dropping digit is in the range from 0 to 4, then the more significant digit (to the left) remains unchanged. If the discarded digit is between 5 and 9, then the more significant digit is increased by 1. You can also switch to the "Round Up (Ceil)" mode or "Round Down (Floor)" in the options and always round an integer to the nearest higher or lower value. For example, rounding 521 up to tens will produce 530 but rounding the same integer 521 down to tens will produce 520. The last rounding method is "Round to a Half". It's very similar to rounding to the nearest integer but here the nearest integer also includes any integer ending in 5. If the dropping digit is 0, 1, or 2, then the action is to round the integer down. If the dropping digit is 8, or 9, then the action is to round the integer up. If the dropping digit is 3, 4, 5, 6, or 7, then the action is to change the dropping digit to 5. For example, the integer 122 will be half-rounded to 120, the integer 123 will be half-rounded to 125, and the integer 128 will be half-rounded to 130. After choosing the rounding mode, you can specify the integer precision. You can round your integers to ones, tens, hundreds, thousands, or other precision. The utility also supports custom rounding precision. You can select the custom precision mode and enter the accuracy as a power of ten. For example, 10000 (round to ten thousands), 1000000000 (round to billions). As an extra feature, you can also round integers with a decimal part. For example, if you enter 0.001 in the custom precision, then the input value will be rounded to 3 decimal places. Integerabulous!
Integer rounder examples Click to use
Rounding to Nearest Tens
This example loads a list of integers from 100 to 110 as the input data and rounds them to tens. It uses the rounding method that rounds them to the nearest integer. This means that if the last digit is from 0 to 4, then they are rounded down, and if the last digit is from 5 to 9, then they are rounded up. In the output, we get only two different integers 100 and 110, which are approximate values of input integers with an accuracy of ten.
100 101 102 103 104 105 106 107 108 109 110
100 100 100 100 100 110 110 110 110 110 110
Required options
These options will be used automatically if you select this example.
Rounding towards closest integer.
Round integers to this place value.
Rounding Money Up
In this example, we use a rounding algorithm that gets rid of the coin part in different currencies. As currencies have the integer part and the fractional part, we choose the round-to-one rounding method. As a result, the program discards the decimal part of each money amount, leaving only the integer part of the amount. In the rounding up method, the presence of at least one coin in the amount bumps up the banknote value by one.
12.5$, 30.4€, 199.9₩, 56.01¥, 66.66£
13$, 31€, 200₩, 57¥, 67£
Required options
These options will be used automatically if you select this example.
Rounding up towards the nearest larger integer.
Round integers to this place value.
Round Ocean Areas
In this example, we're working with data that shows the names of all oceans and their physical area in square kilometers. The area has the precision of up to one thousand km but we'd like to work with simpler numbers and have a precision of ten million. With this tool, we can easily do it and round the integer areas in the data in-place without even having to extract them. We select the round down method and switch to custom precision mode. We enter the value 10000000 in the place value options, which means rounding with an accuracy of ten million.
Pacific Ocean – 155557000 Atlantic Ocean – 76762000 Indian Ocean – 68556000 Southern Ocean – 20327000 Arctic Ocean – 14056000
Pacific Ocean – 150000000 Atlantic Ocean – 70000000 Indian Ocean – 60000000 Southern Ocean – 20000000 Arctic Ocean – 10000000
Required options
These options will be used automatically if you select this example.
Rounding down towards the nearest smaller integer.
Round integers to this place value.
Set the custom precision here.
Pro tips Master online integer tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
https://onlineintegertools.com/round-integers?input=100%0A101%0A102%0A103%0A104%0A105%0A106%0A107%0A108%0A109%0A110&round-to-nearest=true&precision=round-to-tens
All integer tools
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Quickly rewrite integer digits using pretty Unicode glyphs.
Quickly generate random two-dimensional integer points.
Quickly generate random three-dimensional integer points.
Quickly print a list of integers that are palindromes.
Quickly convert the given integer to a palindromic integer.
Quickly find all integers in the given text or string.
Quickly make integer digits go in a triangle wave.
Quickly unleash the destructive force of Zalgo on integers.
Quickly find two or more integers that add up to the given integer.
Quickly find several integers that multiply up to the given integer.
Quickly randomize the given sequence of integers.
Quickly mix the order of digits in an integer.
Quickly put integers in increasing or decreasing order.
Quickly sort the individual digits of an integer.
Quickly increase all integers by a certain amount.
Quickly increase individual digits by a certain amount.
Quickly decrease all integers by a certain amount.
Quickly decrease individual digits by a certain amount.
Quickly randomly select an integer from a list of integers.
Quickly create groups from the digits of an integer.
Quickly write integer digits backwards.
Quickly remove one or more digits from an integer.
Quickly replace one or more digits in an integer.
Quickly drop digits from an integer and make it shorter.
Quickly add the thousands separator to integers.
Quickly remove the thousands separator from integers.
Quickly find the largest integer in a list of integers.
Quickly find the smallest integer in a list of integers.
Quickly find the total sum of a bunch of integers.
Quickly find the sum of all the digits in an integer.
Quickly find the total product of a bunch of integers.
Quickly find the product of all the digits in an integer.
Quickly calculate the partial sum of a bunch of integers.
Quickly calculate the partial product of a bunch of integers.
Quickly flip the sign of one or more integers.
Quickly split an integer into chunks of a given length.
Quickly merge partial integers together to form a larger integer.
Quickly round integers up or down to the required precision.
Quickly convert integers to a downloadable picture.
Quickly generate a list of von Neumann ordinals.
Quickly generate a list of Zermelo ordinals.
Quickly generate an ordered sequence of integers.
Quickly generate an ordered list of even integers.
Quickly generate an ordered list of odd integers.
Quickly write an integer spelling in words.
Quickly convert spelled integers to regular integers with digits.
Quickly generate an array of integers for programming.
Quickly find the number of occurrences of digits in integers.
Coming soon These integer tools are on the way
Draw von Neumann Universe
Create a drawing that visualizes von Neumann hierarchy of sets.
Create Integer n-Tuples
Generate a list of tuples of integers with n elements.
Convert Integers to Unary Base
Quickly convert integers to base one.
Convert Unary Base to Integers
Quickly convert base one to integers.
Convert Integers to Binary Base
Quickly convert integers to base two.
Convert Binary Base to Integers
Quickly convert base two to integers.
Convert Integers to Octal Base
Quickly convert integers to base eight.
Convert Octal Base to Integers
Quickly convert base eight to integers.
Convert Integers to Hex Base
Quickly convert integers to base sixteen.
Convert Hex Base to Integers
Quickly convert base sixteen to integers.
Convert Integers to Any Base
Quickly convert integers to a custom base.
Convert Integers to Base64
Quickly encode integers to base-64.
Convert Base64 to Integers
Quickly decode base-64 to integers.
Convert Integers to HTML Entities
Quickly encode integers to HTML encoding.
Convert HTML Entities to Integers
Quickly decode HTML entities to integers.
Create Random Integers
Generate a list of random integers.
Check if an Integer is Symmetric
Check if the given integers are palindromes.
Generate an Integer Matrix
Create a matrix whose entries are all integers.
Generate an Integer Vector
Create a vector with integer coefficients.
Rotate Integers
Rotate the digits of an integer to the left or right.
Shift Integer Digits
Move the digits of an integer to the left or right.
Subtract Integers
Quickly find the difference of a bunch of integers.
AND Integers
Quickly apply the bitwise AND operation to integers.
OR Integers
Quickly apply the bitwise OR operation to integers.
XOR Integers
Quickly apply the bitwise XOR operation to integers.
NOT Integers
Quickly apply the bitwise NOT operation to integers.
NAND Integers
Quickly apply the bitwise NAND operation to integers.
NOR Integers
Quickly apply the bitwise NOR operation to integers.
XNOR Integers
Quickly apply the bitwise NXOR operation to integers.
Convert an Integer to Ordinal
Add -st, -nd, -rd, -th suffixes to integers to make them ordinals.
Convert an Oridinal to Integer
Remove -st, -nd, -rd, -th suffixes from ordinals to make them ints.
Filter Integers
Find integers that match a filter (greater, less, equal).
Left-pad Integers
Add padding to integers on the left side.
Right-pad Integers
Add padding to integers on the right side.
Right-align Integers
Position all integers so that they align on the right.
Center Integers
Position all integers so that they align in the middle.
Take Absolute Value of Integers
Turn all integers into positive integers.
Make All Integers Negative
Turn all integers into negative integers.
Convert Integers to Fractions
Rewrite an integer in fractional form.
Convert Fractions to Integers
Extract the numerator and denominator from a fraction.
Find and Replace Integers
Search for all occurrences of an integer and replace it.
Generate Integers from Regex
Create integers that match the given regular expression.