Generate selectors with px and enhance to rems nicely and easily. Requires Foundation 5

px-n-rem

@mixin px-n-rem($selector,$size)
    #{$selector}: #{$size}px
    #{$selector}: +rem-calc($size)
  
  
## Usage example
.something
    +px-n-rem('padding', 16)

## Gives you
.something{
    padding: 16px;
    padding: 1rem;
}