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TypeScript - convert string to float

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Created by:

Richard-Bevan

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In this post we can find different ways of how to parse float number with parseFloat function in TypeScript

Quick overview:

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const number: number = parseFloat('3.14');
console.log(number === 3.14); // true

Different method examples are placed below.

1. Float parsing example

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This section shows how to convert with built-in parseFloat method some text to float.

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const text: string = '3.15';
const number: number = parseFloat(text);
​
console.log(number === 3.15); // true

2. Parsing number with unit examples

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parseFloat method during conversion ignores all characters that are not digits and occur after number. It makes possible to parse numbers with units.

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const number1: number = parseFloat('2.5cm'); // centimeters (cm)
console.log(number1 === 2.5); // true
​
const number2: number = parseFloat('2.5in'); // inches (in)
console.log(number2 === 2.5); // true
​
const number3: number = parseFloat('2.5%'); // percentages (%)
console.log(number3 === 2.5); // true