diff --git a/app/assets/stylesheets/_bourbon.scss b/app/assets/stylesheets/_bourbon.scss
index e9d401dfd..889167ee4 100644
--- a/app/assets/stylesheets/_bourbon.scss
+++ b/app/assets/stylesheets/_bourbon.scss
@@ -1,6 +1,7 @@
 // Custom Functions
 @import "functions/deprecated-webkit-gradient";
 @import "functions/grid-width";
+@import "functions/flex-grid";
 @import "functions/modular-scale";
 @import "functions/tint-shade";
 
diff --git a/app/assets/stylesheets/functions/_flex-grid.scss b/app/assets/stylesheets/functions/_flex-grid.scss
new file mode 100644
index 000000000..2cae4524f
--- /dev/null
+++ b/app/assets/stylesheets/functions/_flex-grid.scss
@@ -0,0 +1,35 @@
+// Flexible grid
+@function flex-grid($columns, $container-columns: $fg-max-columns) {
+  $width: $columns * $fg-column + ($columns - 1) * $fg-gutter;
+  $container-width: $container-columns * $fg-column + ($container-columns - 1) * $fg-gutter;
+  @return percentage($width / $container-width);
+}
+
+// Flexible gutter
+@function flex-gutter($container-columns: $fg-max-columns, $gutter: $fg-gutter) {
+  $container-width: $container-columns * $fg-column + ($container-columns - 1) * $fg-gutter;
+  @return percentage($gutter / $container-width);
+}
+
+// The $fg-column, $fg-gutter and $fg-max-columns variables must be defined in your base stylesheet to properly use the grid-width function.
+// This function takes the fluid grid equation (target ÷ context = result) and uses columns to help define each
+//
+//  $fg-column: 60px;         // Column Width
+//  $fg-gutter: 25px;          // Gutter Width
+//  $fg-max-columns: 12;          // Total Columns For Main Container
+//
+//  div {
+//    width: flex-grid(4);    // returns (315px ÷ 1020px) = 30.882353%;
+//    margin-left: flex-gutter(); // returns (25px ÷ 1020px) = 2.45098%;
+//
+//    p {
+//      width: flex-grid(2, 4); // returns (145px ÷ 315px) = 46.031746%;
+//      float: left;
+//      margin: flex-gutter(4); // returns (25px ÷ 315px) = 7.936508%;
+//    }
+//
+//    blockquote {
+//      float: left;
+//      width: flex-grid(2, 4); // returns (25px ÷ 315px) = 46.031746%;
+//    }
+//  }