JavaScript Roundoff Number to Nearest 0.5

Javascript roundoff number to nearest 0.5

Write your own function that multiplies by 2, rounds, then divides by 2, e.g.

function roundHalf(num) {
    return Math.round(num*2)/2;
}

How to round a decimal to the nearest 0.5 (0.5, 1.5, 2.5, 3.5)

First, you can round to integer by

let x = 1.296;
let y = Math.round(x);

Then, you can subtract 0.5 first, then round, then add 0.5

let x = 1.296;
let y = Math.round(x-0.5);
let z = y + 0.5;

Rounding up to the nearest 0.05 in JavaScript

Multiply by 20, then divide by 20:

(Math.ceil(number*20)/20).toFixed(2)

Rounding Up to the nearest 0.5

Figured it out: return Math.ceil(num*2)/2;

Round number to nearest .5 decimal

(Math.round(rating * 2) / 2).toFixed(1)

Javascript : Rounding 2 decimal places of boundary 0.5

Use Math.round(num * 20) / 20, if you are looking to round a number to nearest 0.05.

Rounding duration (hh:mm:ss) to the nearest 0.5

Math.round doesn't take a second parameter, it always rounds to the nearest whole number, but what you could do it just

var final = Math.round(hours*2)/2;

var hms = '2:28:55';   // your input string
var a = hms.split(':'); // split it at the colons
console.log('var a = ' + a)
// minutes are worth 60 seconds. Hours are worth 60 minutes.
var seconds = (+a[0]) * 60 * 60 + (+a[1]) * 60 + (+a[2]);
var hours = seconds / 60 / 60
console.log('seconds = ' + seconds);
console.log('Hours = ' + hours);
var final = Math.round(hours*2)/2;
console.log(final);

How to round of value nearest to the integer in javascript

A faster way of rounding a number also to +0.5 is by rounding the number multiplied by 2, and then divide the result by 2 as well.

function roundToDecimal(number) {
    return Math.round(number * 2) / 2;
}

console.log(roundToDecimal(14.40));

---

Related Topics