diff --git a/esphome/components/x9c/x9c.cpp b/esphome/components/x9c/x9c.cpp
index 1b283a68e5..32a1375f02 100644
--- a/esphome/components/x9c/x9c.cpp
+++ b/esphome/components/x9c/x9c.cpp
@@ -49,17 +49,17 @@ void X9cOutput::setup() {
 
   if (this->initial_value_ <= 0.50) {
     this->trim_value(-101);  // Set min value (beyond 0)
-    this->trim_value((int) (this->initial_value_ * 100));
+    this->trim_value(static_cast<uint32_t>(roundf(this->initial_value_ * 100)));
   } else {
     this->trim_value(101);  // Set max value (beyond 100)
-    this->trim_value((int) (this->initial_value_ * 100) - 100);
+    this->trim_value(static_cast<uint32_t>(roundf(this->initial_value_ * 100) - 100));
   }
   this->pot_value_ = this->initial_value_;
   this->write_state(this->initial_value_);
 }
 
 void X9cOutput::write_state(float state) {
-  this->trim_value((int) ((state - this->pot_value_) * 100));
+  this->trim_value(static_cast<uint32_t>(roundf((state - this->pot_value_) * 100)));
   this->pot_value_ = state;
 }