diff --git a/include/components/bar.hpp b/include/components/bar.hpp
index 8e5d1762..8efab743 100644
--- a/include/components/bar.hpp
+++ b/include/components/bar.hpp
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <cstdlib>
 #include <atomic>
 #include <mutex>
 
@@ -8,6 +9,7 @@
 #include "errors.hpp"
 #include "events/signal_fwd.hpp"
 #include "events/signal_receiver.hpp"
+#include "utils/math.hpp"
 #include "settings.hpp"
 #include "x11/types.hpp"
 #include "x11/window.hpp"
@@ -25,6 +27,21 @@ class taskqueue;
 class tray_manager;
 // }}}
 
+inline double geom_format_to_pixels(std::string str, double max) {
+  size_t i;
+  if ((i = str.find(':')) != std::string::npos) {
+    std::string a = str.substr(0, i - 1);
+    std::string b = str.substr(i + 1);
+    return math_util::percentage_to_value<double>(strtof(a.c_str(), nullptr), max) + strtof(b.c_str(), nullptr);
+  } else {
+    if (str.find('%') != std::string::npos) {
+      return math_util::percentage_to_value<double>(strtof(str.c_str(), nullptr), max);
+    } else {
+      return strtof(str.c_str(), nullptr);
+    }
+  }
+}
+
 class bar : public xpp::event::sink<evt::button_press, evt::expose, evt::property_notify, evt::enter_notify,
                 evt::leave_notify, evt::motion_notify, evt::destroy_notify, evt::client_message>,
             public signal_receiver<SIGN_PRIORITY_BAR, signals::eventqueue::start, signals::ui::tick,
diff --git a/src/components/bar.cpp b/src/components/bar.cpp
index 1abea440..cbd9ad13 100644
--- a/src/components/bar.cpp
+++ b/src/components/bar.cpp
@@ -248,25 +248,10 @@ bar::bar(connection& conn, signal_emitter& emitter, const config& config, const
   auto offsetx = m_conf.get(m_conf.section(), "offset-x", ""s);
   auto offsety = m_conf.get(m_conf.section(), "offset-y", ""s);
 
-  m_opts.size.w = std::strtol(w.c_str(), nullptr, 10);
-  m_opts.size.h = std::strtol(h.c_str(), nullptr, 10);
-  m_opts.offset.x = std::strtol(offsetx.c_str(), nullptr, 10);
-  m_opts.offset.y = std::strtol(offsety.c_str(), nullptr, 10);
-
-  // Evaluate percentages
-  double tmp;
-  if ((tmp = strtof(w.c_str(), nullptr)) && w.find('%') != string::npos) {
-    m_opts.size.w = math_util::percentage_to_value<double>(tmp, m_opts.monitor->w);
-  }
-  if ((tmp = strtof(h.c_str(), nullptr)) && h.find('%') != string::npos) {
-    m_opts.size.h = math_util::percentage_to_value<double>(tmp, m_opts.monitor->h);
-  }
-  if ((tmp = strtof(offsetx.c_str(), nullptr)) != 0 && offsetx.find('%') != string::npos) {
-    m_opts.offset.x = math_util::percentage_to_value<double>(tmp, m_opts.monitor->w);
-  }
-  if ((tmp = strtof(offsety.c_str(), nullptr)) != 0 && offsety.find('%') != string::npos) {
-    m_opts.offset.y = math_util::percentage_to_value<double>(tmp, m_opts.monitor->h);
-  }
+  m_opts.size.w = geom_format_to_pixels(w, m_opts.monitor->w);
+  m_opts.size.h = geom_format_to_pixels(h, m_opts.monitor->h);;
+  m_opts.offset.x = geom_format_to_pixels(offsetx, m_opts.monitor->w);
+  m_opts.offset.y = geom_format_to_pixels(offsety, m_opts.monitor->h);
 
   // Apply offsets
   m_opts.pos.x = m_opts.offset.x + m_opts.monitor->x;