MDN doc
BigIntis a built-in object that provides a way to represent whole numbers larger than 2^53 - 1, which is the largest number JavaScript can reliably represent with theNumberprimitive and represented by theNumber.MAX_SAFE_INTEGERconstant.BigIntcan be used for arbitrarily large integers.
Difference:
BigIntcannot be used with methods in the built-inMathobject and cannot be mixed with instances ofNumberin operations- Because coercing between
NumberandBigIntcan lead to loss of precision, it is recommended to only useBigIntwhen values greater than 2^53 are reasonably expected and not to coerce between the two types.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › BigInt
BigInt - JavaScript | MDN
A BigInt value, also sometimes just called a BigInt, is a bigint primitive, created by appending n to the end of an integer literal, or by calling the BigInt() function (without the new operator) and giving it an integer value or string value.
W3Schools
w3schools.com › js › js_bigint.asp
JavaScript BigInt
BigInt can represent an integer of any size, limited only by available memory. JavaScript Numbers are only accurate up to 15 digits:
Videos
18:35
BigInt - The Needed JavaScript DataType - YouTube
05:36
JavaScript bigint // The missing guide - YouTube
05:33
JavaScript BigInt Explained - YouTube
Chapter 13: Javascript Tutorial - What is a BigInt? - YouTube
04:34
BigInt Explained in 4 Minutes with Examples | JavaScript ...
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MDN doc
BigIntis a built-in object that provides a way to represent whole numbers larger than 2^53 - 1, which is the largest number JavaScript can reliably represent with theNumberprimitive and represented by theNumber.MAX_SAFE_INTEGERconstant.BigIntcan be used for arbitrarily large integers.
Difference:
BigIntcannot be used with methods in the built-inMathobject and cannot be mixed with instances ofNumberin operations- Because coercing between
NumberandBigIntcan lead to loss of precision, it is recommended to only useBigIntwhen values greater than 2^53 are reasonably expected and not to coerce between the two types.
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The differences between BigInt and Number:
Number |
BigInt |
|
|---|---|---|
| Safe Range | Number.MAX_SAFE_INTEGER; loses precision outside of this range |
Extremely large integers |
| Math operations | Supports the Math object |
Basic arithmetic operations: + * - % ** |
| Decimal vs. Integer support | Integers and decimals, e.g 1.00, 2.56 |
Only integers, e.g 1n, 2n. 5n / 2 === 2n |
| Syntax | No special syntax | Append n to the end of a number literal or use new BigInt('100') |
| Type Conversion | Automatically converts Number to BigInt in operations |
Requires explicit conversion to Number for arithmetic involving Number values |
| JSON | Supported by default | Not serializable by default |
Use BigInt when you need to work with extremely large integers or require precise integer arithmetic without any loss of precision.
V8
v8.dev › features › bigint
BigInt: arbitrary-precision integers in JavaScript · V8
May 1, 2018 - BigInts are a new numeric primitive in JavaScript that can represent integers with arbitrary precision. With BigInts, you can safely store and operate on large integers even beyond the safe integer limit for Numbers.
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-bigint
JavaScript BigInt - GeeksforGeeks
December 4, 2025 - JavaScript BigInt is a built-in object that represents whole numbers larger than (2^{53} - 1). A BigInt value, also known as a bigint primitive, is created by appending n to an integer literal or by calling the BigInt() function with an integer ...
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › BigInt › BigInt
BigInt() constructor - JavaScript | MDN
July 10, 2025 - The BigInt() function returns primitive values of type BigInt.
LogRocket
blog.logrocket.com › home › how to use javascript’s bigint
How to use JavaScript's BigInt - LogRocket Blog
June 4, 2024 - BigInt is really important in these fields because it allows developers to safely and precisely handle huge integers, timestamps, IDs, and progress. Generally, a number in JavaScript can be used to represent an integer and even a float, such as 69 and 4.125677 respectively.
web.dev
web.dev › learn › javascript › data-types › bigint
BigInt | web.dev
March 31, 2024 - BigInt primitives are a relatively new addition to JavaScript, allowing mathematical operations on numbers outside the range allowed by Number.
npm
npmjs.com › package › big-integer
big-integer - npm
Converts a bigInt into a native Javascript number.
» npm install big-integer
Published Nov 21, 2023
Version 1.6.52
Author Peter Olson
Repository https://github.com/peterolson/BigInteger.js
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It seems like there is no maximum limit to a BigInt as per spec, which makes sense considering BigInts are supposed to be arbitrary-precision integers, whose "digits of precision are limited only by the available memory of the host system".
As for v8 specifically, according to this article on the v8 blog, the precision of BigInts are "arbitrary up to an implementation-defined limit". Unfortunately, I couldn't find any further information on how the limit is determined. Maybe someone else would be able to shed light on this based on these v8 BigInt implementation notes?
That said, based on the aforementioned articles, there doesn't seem to be a specific maximum value/size for a BigInt. Rather, it is likely determined based on the available memory on the system in some way.
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The maximum size of a BigInt in webkit is defined as such
// The maximum length that the current implementation supports would be
// maxInt / digitBits. However, we use a lower limit for now, because
// raising it later is easier than lowering it.
// Support up to 1 million bits.
static constexpr unsigned maxLength = 1024 * 1024 / (sizeof(void*) * bitsPerByte);
The size of void* is platform dependent, 8 on 64 bit systems.
So there's your answer right? Should be 16384 bits.... (-1 for the sign). But I can't create anywhere near that large a number in console.
JavaScript.info
javascript.info › tutorial › the javascript language › miscellaneous
BigInt
September 21, 2020 - A bigint is created by appending n to the end of an integer literal or by calling the function BigInt that creates bigints from strings, numbers etc.
Mozilla
developer.mozilla.org › en-US › docs › Web › JavaScript › Guide › Data_structures
JavaScript data types and data structures - JavaScript | MDN
The BigInt type is a numeric primitive in JavaScript that can represent integers with arbitrary magnitude.
Smashing Magazine
smashingmagazine.com › 2019 › 07 › essential-guide-javascript-newest-data-type-bigint
The Essential Guide To JavaScript’s Newest Data Type: BigInt — Smashing Magazine
July 22, 2019 - The BigInt data type aims to enable JavaScript programmers to represent integer values larger than the range supported by the Number data type. The ability to represent integers with arbitrary precision is particularly important when performing ...
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-bigint-constructor
JavaScript BigInt() Constructor - GeeksforGeeks
July 23, 2025 - The JavaScript BigInt BigInt() Constructor is used to convert any primitive data type or object to a BigInt data type. It returns a new BigInt object that represents the original value.
DEV Community
dev.to › seanwelshbrown › using-javascript-s-bigint-data-type-4o74
Using JavaScript's BigInt Data Type - DEV Community
August 26, 2020 - Arithmetic on BigInt objects may be done using the following simple operators: +, -, *, /, **, and %. It's worth noting that built in methods using the Math object in JavaScript will not work with BigInts, and that any arithmetic being done between a BigInt and a regular Number will not work— the Number must first be coerced into a BigInt as well.
MDN Web Docs
developer.mozilla.org › en-US › docs › Glossary › BigInt
BigInt - Glossary | MDN
July 11, 2025 - In JavaScript, BigInt is a numeric data type that can represent integers in the arbitrary precision format. In other programming languages different numeric types can exist, for examples: Integers, Floats, Doubles, or Bignums.
Mastering JS
masteringjs.io › tutorials › fundamentals › bigint-to-number
Convert a BigInt to a Number in JavaScript - Mastering JS
April 25, 2023 - You can convert BigInts to numbers using the `Number()` constructor, with a few caveats. Here's what you need to know.
Oprea
oprea.rocks › blog › bigint-chrome-how-to-handle-big-numbers-in-javascript-and-css-architecture.html
Adrian OPREA | Remote Full Stack Software Engineer | Reading BigInt in Chrome, how to handle big numbers in JavaScript & CSS architecture
May 10, 2018 - Mathias Bynens — BigInt: arbitrary-precision integers in JavaScript
JavaScript Tutorial
javascripttutorial.net › home › javascript tutorial › javascript bigint
JavaScript BigInt
November 14, 2024 - let bigInt = 9007199254740991n;Code language: JavaScript (javascript)
Scaler
scaler.com › home › topics › javascript bigint library
JavaScript BigInt Library - Scaler Topics
September 29, 2023 - The JavaScript BigInt is a built-in object in javascript that is used to store the numbers that are greater than Number.MAX_SAFE_INTEGER. There are some rules to create a JavaScript BigInt value.