Generate headings relatively with Sass

headings-generator-s1.scss

// whatever size and number suits you
$font-size: 1.2rem;
$i: 3;

@each $h in h6, h5, h4, h3, h2, h1 {
  #{$h} { 
    font-size: $font-size + $i;
    line-height: $font-size * 2 + $i;
    font-weight: bold;
  }
  // or maybe $i + .5
  $i: $i + 1;
}