JavaScript Round To The Nearest 5

11th April 2009 - 2 minutes read time

I have already talked about a JavaScript function that rounds To the nearest number, but this was only useful if the number needed to be to the nearest 10 (or factor of). The following function is similar, but will round the number to the nearest 5 or 10, depending which is closer.

function round5(x)
{
    return (x % 5) >= 2.5 ? parseInt(x / 5) * 5 + 5 : parseInt(x / 5) * 5;
}

Use the function like this:

alert(round5(12)); // returns 10
alert(round5(14)); // returns 15
JavaScript

Comments

Thanks for the function, it really helped! Robert

Submitted by Robert on Thu, 12/13/2012 - 16:56

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Would it not be simpler to do:function round5(x) { return Math.round(x / 5) * 5; }

Submitted by Chris on Fri, 06/27/2014 - 11:49

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Hi thanks for the method!! it really help me !!

Submitted by Mark on Thu, 10/12/2017 - 09:42

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Thanks!

Submitted by Mike on Sat, 10/21/2017 - 16:46

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Thanks

Submitted by Fe on Mon, 12/06/2021 - 08:42

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//  Round to the nearest m multiple
//  USAGE: roundN(32, 5) => 30 (the nearest five)
//  USAGE: roundN(33, 5) => 35 (the nearest five)
function roundN(x, m)
{
    //  if (1 == m) return Math.round(x);
    return ((x % m) >= (m / 2))
    //  round up
    ? m * Math.round((x + (m / 2)) / m)
    //  round down
    :    m * Math.round(x / m);
}

 

Submitted by Bitty bitty bum on Fri, 02/11/2022 - 01:03

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