diff --git a/esphome/components/lvgl/automation.py b/esphome/components/lvgl/automation.py
index f49356604b..cc0f833ced 100644
--- a/esphome/components/lvgl/automation.py
+++ b/esphome/components/lvgl/automation.py
@@ -21,7 +21,7 @@ from .defines import (
     literal,
     static_cast,
 )
-from .lv_validation import lv_bool, lv_color, lv_image, opacity
+from .lv_validation import lv_bool, lv_color, lv_image, lv_milliseconds, opacity
 from .lvcode import (
     LVGL_COMP_ARG,
     UPDATE_EVENT,
@@ -129,14 +129,14 @@ async def lvgl_is_paused(config, condition_id, template_arg, args):
     LVGL_SCHEMA.extend(
         {
             cv.Required(CONF_TIMEOUT): cv.templatable(
-                cv.positive_time_period_milliseconds
+                lv_milliseconds,
             )
         }
     ),
 )
 async def lvgl_is_idle(config, condition_id, template_arg, args):
     lvgl = config[CONF_LVGL_ID]
-    timeout = await cg.templatable(config[CONF_TIMEOUT], [], cg.uint32)
+    timeout = await lv_milliseconds.process(config[CONF_TIMEOUT])
     async with LambdaContext(LVGL_COMP_ARG, return_type=cg.bool_) as context:
         lv_add(ReturnStatement(lvgl_comp.is_idle(timeout)))
     var = cg.new_Pvariable(
diff --git a/tests/components/lvgl/lvgl-package.yaml b/tests/components/lvgl/lvgl-package.yaml
index c77983461d..d8452bdd2a 100644
--- a/tests/components/lvgl/lvgl-package.yaml
+++ b/tests/components/lvgl/lvgl-package.yaml
@@ -170,6 +170,12 @@ lvgl:
               lvgl.page.is_showing: page1
             then:
               logger.log: "Yes, page1 showing"
+        - if:
+            condition:
+              lvgl.is_idle:
+                timeout: !lambda return 5000;
+            then:
+              logger.log: LVGL is idle
       on_unload:
         - logger.log: page unloaded
         - lvgl.widget.focus: mark