Round number to nearest thousand, up or down depending on the number

Question

I want to round up a number to the nearest thousand, at the moment I'm using this:

Math.ceil(value/1000)*1000;

But this goes always up, if I type 1001 it will go to 2000, I want to go up or down depeding on the number, for example 1001 goes to 1000 or 1400 goes to 1000 but 1500 goes to 2000

EDIT:

if(value<1000){
  value = 1000;
}else{
  value = Math.round(value/1000)*1000;
}

Answer 1

This will do what you want:

Math.round(value/1000)*1000 

examples:

Math.round(1001/1000)*1000 1000 Math.round(1004/1000)*1000 1000 Math.round(1500/1000)*1000 2000 

Answer 2

var rest = number % 1000;  if(rest > 500)  { number = number - rest + 1000; }    else  { number = number - rest; }  

maybe a bit straight forward.. but this does it

EDIT: of course this should go in some kind of myRound() function

I read about the problem with your 1 needing to round up to 1000. this behaviour is controverse compared to the rest - so you will have to add something like:

if(number < 1000) {  number = 1000; return number; } 

ontop of your function;

Answer 3

By using ES3 Number method, it performs a rounding if no decimal place defined.

(value / 1000).toFixed() * 1000

---

The original answer was:

(value / 1000).toFixed(3) * 1000;

Yet this is incorrect, due to the value will return the exact original number, instead of affecting the ceil/floor on the value.

Answer 4

So this function below allow you to roundUp a number to the nearest near, basically you can roundUp a number to the nearest 10, or 1000 by just passing near 10,1000. That is all.

For instance, if i want to roundUp 10 to nearest 10, it should not return 20 as in the accepted answer, it should return 10.

function roundUp(number,near){
  if(number%near===0) return number;
    return  parseInt(number / near) * near+near;
  
}

console.log(roundUp(110,10)) // 110
console.log(roundUp(115,10)) // 120
console.log(roundUp(115,100)) // 200

Answer 5

Not the exactly point, but to round a number like 1250 to 1.2k or 55730 to 55,7m you might use something like:

let value = 90731+'';
let len = value.length;
let sym = len>6?'m':'k';
let hundred = (len==9||len==6);
if(len>3){
  value = value.slice(0,-3)+(hundred?'':'.'+value.charAt(1))+sym;
};