diff --git a/src/util/time.ts b/src/util/time.ts
new file mode 100644
index 0000000..da32243
--- /dev/null
+++ b/src/util/time.ts
@@ -0,0 +1,14 @@
+import dayjs from 'dayjs';
+import relativeTime from 'dayjs/plugin/relativeTime.js';
+import pl from 'dayjs/locale/pl.js';
+
+dayjs.extend(relativeTime);
+dayjs.locale(pl);
+
+
+export const msToTime = (duration: number) => {
+    const minutes = Math.floor((duration / (1000 * 60)) % 60);
+    const hours = Math.floor((duration / (1000 * 60 * 60)) % 24);
+
+    return `${hours ? `${hours}h ` : ''}${minutes ? `${minutes}m` : ''}`;
+}
\ No newline at end of file