# Milliseconds in a Week > Number of milliseconds in a week.
## Usage ```javascript var MILLISECONDS_IN_WEEK = require( '@stdlib/constants/time/milliseconds-in-week' ); ``` #### MILLISECONDS_IN_WEEK Number of milliseconds in a week. ```javascript var bool = ( MILLISECONDS_IN_WEEK === 604800000 ); // returns true ```
## Notes - The value is a generalization and does **not** take into account inaccuracies due to daylight savings conventions, crossing timezones, or other complications with time and dates.
## Examples ```javascript var randu = require( '@stdlib/random/base/randu' ); var roundn = require( '@stdlib/math/base/special/roundn' ); var MILLISECONDS_IN_WEEK = require( '@stdlib/constants/time/milliseconds-in-week' ); var ms; var w; var i; function wks2ms( wks ) { return wks * MILLISECONDS_IN_WEEK; } for ( i = 0; i < 10; i++ ) { w = roundn( randu()*20.0, -2 ); ms = wks2ms( w ); console.log( '%d weeks => %d milliseconds', w, ms ); } ```