diff --git a/source/coral/io.cpp b/source/coral/io.cpp
index abbee10..c2b595e 100644
--- a/source/coral/io.cpp
+++ b/source/coral/io.cpp
@@ -27,6 +27,13 @@ export namespace coral {
 			return this->data;
 		}
 
+		/**
+		 * Returns the number of bytes in the buffer that have been filled with data.
+		 */
+		usize count() const {
+			return this->filled;
+		}
+
 		/**
 		 * Returns the tail pointer of the buffer data.
 		 */