Round Down Decimal Places Javascript

I need a rounding down many many decimal places down, basically roundTo but supposedly rounding down at the spot. Example,

take the number, 1.087179939485353505
but to the fifth place, with roundTo of 6
roundTo(1.087179939485353505, 6) is 1.08718

I need 1.08717 not 1.08718 in javascript.

var Variable = roundTo(Variable / 1000000000000000000, 6);

Resolved There seems to be no native javascript decimal rounding function that rounds down. One of two options are available.

  1. Convert to string and manipulate the data that way (makes the most sense).

  2. Utilize a number and multiply, floor then re-divide again for your number

How about convert to string, slice and convert back to number.

const roundTo = num => Number(String(num).slice(0, 7));


How to round down number 2 decimal places?, There is no built-in method to round to a certain number of digits in JavaScript. You might think the Math.round() function would take an� Use Math.floor to round the decimal places under the current value. Math.floor(1.0789* 100) / 100 How to round down decimal number in javascript. Related. 2400.

You could use regex to get 5 decimals

function roundTo(number) {
    var result= number.toString().match(/^\d+(\.\d{0,5})/)[0];


JavaScript toFixed() Method, We can round to the nearest integer, round down or round up. Rounding numbers with decimal precision requires a little bit of calculation� The most common solutions for rounding to a decimal place is to either use Number.prototype.toFixed(), or multiply the float by some power of 10 in order to leverage Math.round(). Both of these work, except sometimes a decimal of 5 is rounded down instead of up. Number ((1.005).toFixed(2)); // 1 instead of 1.01 Math.round(1.005 * 100)/ 100

var Variable = Variable / 1000000000000000000;
Variable *= 1000000;
Variable = Math.floor(Variable);
Variable /= 1000000;
var Variable = roundTo(Variable, 6);

I took my decimal, multiplied it by how many places I wanted to roundTo, math floor for absolute low rounding and divided it once again before lastly using roundTo for the precise decimal place. Seems the only way.

How to Round to a Certain Number of Decimal Places in JavaScript , Round numbers to various degrees of precision by using the Math.round, If the first number after the decimal is 4 or lower, it rounds down. Once example can be when needing to drop decimal places from a pixel value to avoid anti aliasing or weird pixel rounding which is completely different across browser engines. Rounding numbers in Javascript # Rounding is straight forward. We can round to the nearest integer, round down or round up. JavaScript uses three methods to achieve this:

Rounding and truncating numbers in JavaScript, The Math.round() function returns the value of a number rounded to the in the case of negative numbers with a fractional part of exactly 0.5. A number can be rounded off to upto 2 decimal places using two different approaches in javascript. Method 1: Using toFixed() method. The Number.toFixed() method takes an integer as an input and returns the the given number as a string in which the fraction is padded to the input integers length.

Rounding Numbers in JavaScript, But what if we'd like to round the number to n-th digit after the decimal? For instance, we have 1.2345 and want to round it to 2 digits, getting only� Definition and Usage. The toFixed() method converts a number into a string, rounding to a specified number of decimals. Note: if the desired number of decimals are higher than the actual number, zeros are added to create the desired decimal length.

Math.round(), There are various methods of rounding off a number upto 2 decimal places in JavaScript but the simplest is using the Math.round() method. JavaScript math, round to two decimal places [duplicate] toFixed will round up or down for you depending on the values beyond 2 decimals. is the easiest

  • It looks like you want to truncate, not round.
  • Truncate does seem the way to go, the answers below have given excellent detail on converting to string and working with it as a string which makes more sense than my answer of using numbers, since for my particular case, I needed a string in the end.