Convert px to em in Less

Question

What is the equivalent of Scss\' emCalc() in less?

padding: emCalc(24px);

in Scss will calculate em based on the viewpoint and

Answer 1

Another variant is shown here.

/* 
Toolkit: Rem
============
.rem() takes a @property, and @list of values (in px or unitless) and
converts to rem.
e.g.,
.selector {
    .rem( margin, 20 auto eggs 666% );
    .rem( font-size, 12 );
}
Makes life a little easier when working from designs specced in pixels.
*/

.rem( @property, @list, @base: 16 ) {
@n: length(@list);

// Only convert numbers that are not percentages or 0;
._merge( @px ) when ( isnumber(@px) ) and not ( ispercentage(@px) ) and not ( @px = 0 ) {
    @rem: ( @px / @base );
    @{property}+_: unit(@rem, rem);
}
._merge( @px ) when ( default() ) {
    @{property}+_: @px;
}

._loop( @n ) when ( @n > 0 ) {
    ._loop((@n - 1));

    @val: extract(@list, @n);
    ._merge( @val ); // merges values onto @property with space character.
}

._loop( @n );
}

Source: https://gist.github.com/dominicwhittle/66275e9014bec7ec1b6f