1 files changed, 5 insertions, 0 deletions
diff --git a/src/util/units.cpp b/src/util/units.cpp
index 78531bfaf..dcb3ae4b1 100644
--- a/src/util/units.cpp
+++ b/src/util/units.cpp
@@ -504,6 +504,11 @@ double Quantity::value(const Glib::ustring u) const
 /** Convert distances. */
 double Quantity::convert(const double from_dist, const Unit &from, const Unit &to)
 {
+    // Percentage
+    if (to.type == UNIT_TYPE_DIMENSIONLESS) {
+        return from_dist * to.factor;
+    }
+    
     // Incompatible units
     if (from.type != to.type) {
         return -1;