diff --git a/built-in-nodes/WanImageToVideo.mdx b/built-in-nodes/WanImageToVideo.mdx
index e44aea110..5830d8173 100644
--- a/built-in-nodes/WanImageToVideo.mdx
+++ b/built-in-nodes/WanImageToVideo.mdx
@@ -8,6 +8,8 @@ mode: wide
 
 The WanImageToVideo node prepares conditioning and latent representations for video generation tasks. It creates an empty latent space for video generation and can optionally incorporate starting images and CLIP vision outputs to guide the video generation process. The node modifies both positive and negative conditioning inputs based on the provided image and vision data.
 
+**Output video frame rate:** The generated video uses a fixed frame rate of **16 FPS**. To calculate the output duration, divide the `length` (frame count) by 16. For example, the default length of 81 frames produces approximately 5 seconds of video.
+
 ## Inputs
 
 | Parameter | Description | Data Type | Required | Range |