diff --git a/src/modules/battery.cpp b/src/modules/battery.cpp
index e65a2dcf..df3712a6 100644
--- a/src/modules/battery.cpp
+++ b/src/modules/battery.cpp
@@ -370,7 +370,7 @@ const std::tuple<uint8_t, float, std::string, float, uint16_t, float> waybar::mo
         }
 
         if (charge_full_exists && charge_full_design_exists) {
-          float bat_health_percent = ((float)charge_full_design / charge_full) * 100;
+          float bat_health_percent = ((float)charge_full / charge_full_design) * 100;
           if (main_bat_health_percent == 0.0f || bat_health_percent < main_bat_health_percent) {
             main_bat_health_percent = bat_health_percent;
           }