diff --git a/firmware/common/utility.hpp b/firmware/common/utility.hpp
index 924297f68..9eab69e6d 100644
--- a/firmware/common/utility.hpp
+++ b/firmware/common/utility.hpp
@@ -111,7 +111,7 @@ inline uint32_t ms_duration(
     if (sample_rate == 0 || bytes_per_sample == 0)
         return 0;
 
-    return buffer_size / bytes_per_sample / sample_rate * 1000;
+    return buffer_size * 1000 / (bytes_per_sample * sample_rate);
 }
 
 int fast_int_magnitude(int y, int x);