diff --git a/src/utilities.typ b/src/utilities.typ
index 059e6c1..a8013b3 100644
--- a/src/utilities.typ
+++ b/src/utilities.typ
@@ -197,37 +197,10 @@
     } else if type(len) == _fraction_type {
         convert-fraction-type-topt(len, frac_amount, frac_total)
     } else if type(len) == _rel_len_type {
-        if styles == none {
-            panic("Cannot convert relative length to pt ('styles' not specified).")
-        }
-
-        let ratio_regex = regex("^\\d+%")
-        let ratio = repr(len).find(ratio_regex)
-
-        if ratio == none {  // 2em + 5pt  (doesn't contain 100% or something)
-            measure(line(length: len), styles).width
-        } else {  // 100% + 2em + 5pt  --> extract the "100%" part
-            if page_size == none {
-                panic("Cannot convert relative length to pt ('page_size' not specified).")
-            }
-
-            // SAFETY: guaranteed to be a ratio by regex
-            let ratio_part = eval(ratio)
-            assert(type(ratio_part) == _ratio_type, message: "Eval didn't return a ratio")
-
-            let other_part = len - ratio_part  // get the (2em + 5pt) part
+        let ratio_part_pt = convert-ratio-type-to-pt(len.ratio, page_size)
+        let length_part_pt = convert-length-type-to-pt(len.length, styles)
 
-            let ratio_part_pt = if is-infinite-len(page_size) { 0pt } else { ((ratio_part / 1%) / 100) * page_size }
-            let other_part_pt = 0pt
-
-            if other_part < 0pt {
-                other_part_pt = -measure(line(length: -other_part), styles).width
-            } else {
-                other_part_pt = measure(line(length: other_part), styles).width
-            }
-
-            ratio_part_pt + other_part_pt + 0pt
-        }
+        ratio_part_pt + length_part_pt
     } else {
         panic("Cannot convert '" + type(len) + "' to length.")
     }