diff --git a/src/utils.js b/src/utils.js
new file mode 100644
index 0000000..4650f07
--- /dev/null
+++ b/src/utils.js
@@ -0,0 +1,11 @@
+function sortableSize(string) {
+	const UNITS = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
+	const [numStr, unit] = string.split(' ');
+	if (UNITS.indexOf(unit) === -1)
+	  return string
+	const exponent = UNITS.indexOf(unit) * 3
+	return numStr * (Math.pow(10, exponent))
+}
+
+
+export { sortableSize }
\ No newline at end of file