diff --git a/lib/caching-utils.js b/lib/caching-utils.js
new file mode 100644
index 000000000..63cd84550
--- /dev/null
+++ b/lib/caching-utils.js
@@ -0,0 +1,15 @@
+"use strict";
+Object.defineProperty(exports, "__esModule", { value: true });
+exports.getTotalCacheSize = getTotalCacheSize;
+const util_1 = require("./util");
+/**
+ * Returns the total size of all the specified paths.
+ * @param paths The paths for which to calculate the total size.
+ * @param logger A logger to record some informational messages to.
+ * @returns The total size of all specified paths.
+ */
+async function getTotalCacheSize(paths, logger) {
+    const sizes = await Promise.all(paths.map((cacheDir) => (0, util_1.tryGetFolderBytes)(cacheDir, logger)));
+    return sizes.map((a) => a || 0).reduce((a, b) => a + b, 0);
+}
+//# sourceMappingURL=caching-utils.js.map
\ No newline at end of file
diff --git a/lib/caching-utils.js.map b/lib/caching-utils.js.map
new file mode 100644
index 000000000..cc6155960
--- /dev/null
+++ b/lib/caching-utils.js.map
@@ -0,0 +1 @@
+{"version":3,"file":"caching-utils.js","sourceRoot":"","sources":["../src/caching-utils.ts"],"names":[],"mappings":";;AASA,8CAQC;AAhBD,iCAA2C;AAE3C;;;;;GAKG;AACI,KAAK,UAAU,iBAAiB,CACrC,KAAe,EACf,MAAc;IAEd,MAAM,KAAK,GAAG,MAAM,OAAO,CAAC,GAAG,CAC7B,KAAK,CAAC,GAAG,CAAC,CAAC,QAAQ,EAAE,EAAE,CAAC,IAAA,wBAAiB,EAAC,QAAQ,EAAE,MAAM,CAAC,CAAC,CAC7D,CAAC;IACF,OAAO,KAAK,CAAC,GAAG,CAAC,CAAC,CAAC,EAAE,EAAE,CAAC,CAAC,IAAI,CAAC,CAAC,CAAC,MAAM,CAAC,CAAC,CAAC,EAAE,CAAC,EAAE,EAAE,CAAC,CAAC,GAAG,CAAC,EAAE,CAAC,CAAC,CAAC;AAC7D,CAAC"}
\ No newline at end of file
diff --git a/src/caching-utils.ts b/src/caching-utils.ts
new file mode 100644
index 000000000..41a098a9a
--- /dev/null
+++ b/src/caching-utils.ts
@@ -0,0 +1,18 @@
+import { Logger } from "./logging";
+import { tryGetFolderBytes } from "./util";
+
+/**
+ * Returns the total size of all the specified paths.
+ * @param paths The paths for which to calculate the total size.
+ * @param logger A logger to record some informational messages to.
+ * @returns The total size of all specified paths.
+ */
+export async function getTotalCacheSize(
+  paths: string[],
+  logger: Logger,
+): Promise<number> {
+  const sizes = await Promise.all(
+    paths.map((cacheDir) => tryGetFolderBytes(cacheDir, logger)),
+  );
+  return sizes.map((a) => a || 0).reduce((a, b) => a + b, 0);
+}