Round number up to nearest thousand

Question

I need round a number up to the nearest thousand. I tried round($x, -3), but the output is not really what I want.

Examples of the desired output:

999 => 1,000
1,000.0001 => 2,000
1,001 => 2,000
1,100 => 2,000
1,600 => 2,000
100,010 => 101,000

I imagine you could do [something like this](http://stackoverflow.com/a/22225765/1790644) but opposite. — Matt Clark, Dec 28 '16 at 15:49

score 14 · Accepted Answer · answered Dec 28 '16 at 15:50

You can do this by combining ceil() with some multiplication and division, like this:

function roundUpToNearestThousand($n)
{
    return (int) (1000 * ceil($n / 1000));
}

More generically:

function roundUpToNearestMultiple($n, $increment = 1000)
{
    return (int) ($increment * ceil($n / $increment));
}

score 6 · Answer 2 · answered Dec 28 '16 at 15:49

6

I'm not sure if there is a specific function for what you're after but you could do something like:

(int) ceil($x / 1000) * 1000;

Hope this helps!

answered Dec 28 '16 at 15:49

Rwd

2 Answers2