MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › parseFloat
parseFloat() - JavaScript | MDN
The parseFloat() function parses a string argument and returns a floating point number.
Stack Overflow
stackoverflow.com › questions › 27875280 › typescript-parsefloat-not-working
TypeScript parseFloat not working - Stack Overflow
I have tested var opacity = "0.9"; var parsed = parseFloat(opacity); alert(parsed); and it works as expected, so your problem lies elsewhere.
Videos
W3Schools
w3schools.com › jsref › jsref_parsefloat.asp
JavaScript parseFloat() Method
The parseFloat() method parses a value as a string and returns the first number.
MDN Web Docs
developer.mozilla.org › en-US › docs › Web › JavaScript › Reference › Global_Objects › Number › parseFloat
Number.parseFloat() - JavaScript | MDN
The Number.parseFloat() static method parses an argument and returns a floating point number. If a number cannot be parsed from the argument, it returns NaN.
GitHub
github.com › microsoft › TypeScript › issues › 17203
parseFloat accepts only a string as an argument · Issue #17203 · microsoft/TypeScript
March 21, 2017 - According to the ECMA specs there is not any requirement that value passed to the parseFloat function must be a string. I would say even more, the behavior of this function is well defined for object with have either valueOf or toString functions. In such case correct code in Javascript is not a correct one in Typescript.
Author marcinkowal2015
Execute Program
executeprogram.com › courses › typescript-basics › articles › how-to-convert-a-string-to-a-number-in-typescript
How to convert a string to a number in TypeScript
Learn programming languages like TypeScript, Python, JavaScript, SQL, and regular expressions. Interactive with real code examples.
GitHub
github.com › microsoft › TypeScript › issues › 50828
ParseInt and ParseFloat should accept numbers and BigInt as Input · Issue #50828 · microsoft/TypeScript
July 28, 2022 - parseInt(854n); // Should work with bigInt parseInt(548.25); // Should work too with numbers parseFloat(854n); // Should work with bigInt parseFloat(548.25); // Should work too with numbers // Using wrappers const n = new Number(55); parseInt(n); // Should work
Author rafikalid
GeeksforGeeks
geeksforgeeks.org › typescript › how-to-convert-string-to-number-in-typescript
How to Convert String to Number in TypeScript? - GeeksforGeeks
July 23, 2025 - The parseFloat() function in TypeScript converts a string to a floating-point number by parsing its content.
TechOnTheNet
techonthenet.com › js › number_parsefloat.php
JavaScript: Number parseFloat() method
The parseFloat() method parses a string and returns its value as a floating point number.
Top answer 1 of 16
2500
Exactly like in JavaScript, you can use the parseInt or parseFloat functions, or simply use the unary + operator:
var x = "32";
var y: number = +x;
All of the mentioned techniques will have correct typing and will correctly parse simple decimal integer strings like "123", but will behave differently for various other, possibly expected, cases (like "123.45") and corner cases (like null).
Table taken from this answer
2 of 16
1668
The TypeScript way to do this would be:
Number('1234') // 1234
Number('9BX9') // NaN
as answered here: https://stackoverflow.com/a/23440948/2083492
GeeksforGeeks
geeksforgeeks.org › typescript › how-to-parse-float-with-two-decimal-places-in-typescript
How to Parse Float with Two Decimal Places in TypeScript ? - GeeksforGeeks
July 23, 2025 - In Typescript, parsing float with two decimal places refers to mainly converting the float number with two digits after the decimal points.
Codecademy
codecademy.com › docs › javascript › number methods › .parsefloat()
JavaScript | Number Methods | .parseFloat() | Codecademy
May 31, 2024 - In JavaScript, the .parseFloat() method parses a given string and returns the first floating-point number found in the string. Parsing stops when it encounters a character that is not part of a valid number.
W3Schools
w3schools.com › jsref › jsref_number_parsefloat.asp
JavaScript Number.parseFloat()
The Number.parseFloat() method parses a value as a string and returns the first number.
GitHub
github.com › microsoft › TypeScript › issues › 38471
parseInt and parseFloat should accept any and not just strings · Issue #38471 · microsoft/TypeScript
March 16, 2020 - TypeScript Version: 3.8.3 (playground) Search Terms: "parseInt any" "parseInit type" "parseInit string" "parseFloat any" "parseFloat type" "parseFloat string" Code const maybeNumber: number | string = 1; // The issue: parseInt only accep...
Published May 11, 2020
Author MoritzKn
Camchenry
camchenry.com › blog › parsefloat-vs-number
parseFloat vs Number: What's the Difference? | Cam McHenry
In addition to whitespace, Number will also parse booleans as numbers, whereas parseFloat will not.
Flexiple
flexiple.com › javascript › parsefloat-javascript
parseFloat JavaScript: Syntax and Examples - Flexiple
Learn how to use the JavaScript parseFloat function to convert strings to floating-point numbers accurately. Examples and tips included.
GeeksforGeeks
geeksforgeeks.org › javascript › javascript-number-parsefloat-method
JavaScript Number parseFloat() Method - GeeksforGeeks
July 11, 2025 - JavaScript parseFloat() Method is used to accept the string and convert it into a floating-point number. If the string does not contain a numeral value or If the first character of the string is not a Number then it returns NaN i.e, not a number.
Webdevtutor
webdevtutor.net › blog › typescript-parse-string-to-float
A Complete Guide to Parsing Strings to Float in TypeScript
One of the simplest ways to convert a string to a float in TypeScript is by using the parseFloat function. This built-in JavaScript function takes a string as input and returns a floating-point number.
Ramesh Fadatare
rameshfadatare.com › home › typescript parsefloat()
TypeScript parseFloat()
July 9, 2024 - In this chapter, we explored the parseFloat() function in TypeScript, which is used to parse a string argument and return a floating-point number. We covered its definition, syntax, parameters, return value, and provided several examples to demonstrate its usage.
Webdevtutor
webdevtutor.net › blog › typescript-parse-float
A Comprehensive Guide to Parsing Float in Typescript
Typescript provides several ways to parse float values. One common method is using the parseFloat function. This function takes a string as input and returns a floating-point number.