diff --git a/src/utils/types/promise-type.ts b/src/utils/types/promise-type.ts
new file mode 100644
index 0000000..233d7c0
--- /dev/null
+++ b/src/utils/types/promise-type.ts
@@ -0,0 +1,6 @@
+/**
+ * Obtains the underlying type of a {@link Promise}.
+ *
+ * @template T - A `Promise` type to extract the underlying type from.
+ */
+export type PromiseType<T extends Promise<unknown>> = T extends Promise<infer U> ? U : never;