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    Number.prototype.toFixed()

    Summary

    The toFixed() method formats a number using fixed-point notation.

    Syntax

    numObj.toFixed([digits])

    Parameters

    digits
    Optional. The number of digits to appear after the decimal point; this may be a value between 0 and 20, inclusive, and implementations may optionally support a larger range of values. If this argument is omitted, it is treated as 0.

    Returns

    A string representation of numObj that does not use exponential notation and has exactly digits digits after the decimal place. The number is rounded if necessary, and the fractional part is padded with zeros if necessary so that it has the specified length. If numObj is greater than 1e+21, this method simply calls Number.prototype.toString() and returns a string in exponential notation.

    Throws

    RangeError
    If digits is too small or too large. Values between 0 and 20, inclusive, will not cause a RangeError. Implementations are allowed to support larger and smaller values as well.
    TypeError
    If this method is invoked on an object that is not a Number.

    Examples

    Example: Using toFixed

    var numObj = 12345.6789;
    
    numObj.toFixed();       // Returns '12346': note rounding, no fractional part
    numObj.toFixed(1);      // Returns '12345.7': note rounding
    numObj.toFixed(6);      // Returns '12345.678900': note added zeros
    (1.23e+20).toFixed(2);  // Returns '123000000000000000000.00'
    (1.23e-10).toFixed(2);  // Returns '0.00'
    2.34.toFixed(1);        // Returns '2.3'
    -2.34.toFixed(1);       // Returns -2.3 (due to operator precedence, negative number literals don't return a string...)
    (-2.34).toFixed(1);     // Returns '-2.3' (...unless you use parentheses)
    

    Specifications

    Specification Status Comment
    ECMAScript 3rd Edition. Standard Initial definition. Implemented in JavaScript 1.5.
    ECMAScript 5.1 (ECMA-262)
    The definition of 'Number.prototype.toFixed' in that specification.
    Standard  
    ECMAScript 2015 (6th Edition, ECMA-262)
    The definition of 'Number.prototype.toFixed' in that specification.
    Standard  

    Browser compatibility

    Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes)
    Feature Android Chrome for Android Firefox Mobile (Gecko) IE Mobile Opera Mobile Safari Mobile
    Basic support (Yes) (Yes) (Yes) (Yes) (Yes) (Yes)

    See also

    Document Tags and Contributors

    Last updated by: Mingun,