diff --git a/source/blender/blenkernel/BKE_scene.hh b/source/blender/blenkernel/BKE_scene.hh
index 7b6986ada01..2273ca70e50 100644
--- a/source/blender/blenkernel/BKE_scene.hh
+++ b/source/blender/blenkernel/BKE_scene.hh
@@ -138,7 +138,7 @@ const char *BKE_scene_find_marker_name(const Scene *scene, int frame);
  */
 const char *BKE_scene_find_last_marker_name(const Scene *scene, int frame);
 
-int BKE_scene_frame_snap_by_seconds(Scene *scene, double interval_in_seconds, int frame);
+float BKE_scene_frame_snap_by_seconds(const Scene *scene, double interval_in_seconds, float frame);
 
 /**
  * Checks for cycle, returns true if it's all OK.
diff --git a/source/blender/blenkernel/CMakeLists.txt b/source/blender/blenkernel/CMakeLists.txt
index 8e1dee7613a..c3fdc0bfddb 100644
--- a/source/blender/blenkernel/CMakeLists.txt
+++ b/source/blender/blenkernel/CMakeLists.txt
@@ -814,6 +814,7 @@ if(WITH_GTESTS)
     intern/main_test.cc
     intern/nla_test.cc
     intern/path_templates_test.cc
+    intern/scene_test.cc
     intern/subdiv_ccg_test.cc
     intern/tracking_test.cc
     intern/volume_test.cc
diff --git a/source/blender/blenkernel/intern/scene.cc b/source/blender/blenkernel/intern/scene.cc
index 2adeea30ee2..82015441756 100644
--- a/source/blender/blenkernel/intern/scene.cc
+++ b/source/blender/blenkernel/intern/scene.cc
@@ -2291,14 +2291,19 @@ const char *BKE_scene_find_last_marker_name(const Scene *scene, int frame)
   return best_marker ? best_marker->name : nullptr;
 }
 
-int BKE_scene_frame_snap_by_seconds(Scene *scene, double interval_in_seconds, int frame)
+float BKE_scene_frame_snap_by_seconds(const Scene *scene,
+                                      const double interval_in_seconds,
+                                      const float frame)
 {
-  const int fps = round_db_to_int(scene->frames_per_second() * interval_in_seconds);
-  const int second_prev = frame - mod_i(frame, fps);
-  const int second_next = second_prev + fps;
-  const int delta_prev = frame - second_prev;
-  const int delta_next = second_next - frame;
-  return (delta_prev < delta_next) ? second_prev : second_next;
+  BLI_assert(interval_in_seconds > 0);
+  BLI_assert(scene->frames_per_second() > 0);
+
+  const double interval_in_frames = scene->frames_per_second() * interval_in_seconds;
+  const double second_prev = interval_in_frames * floor(frame / interval_in_frames);
+  const double second_next = second_prev + ceil(interval_in_frames);
+  const double delta_prev = frame - second_prev;
+  const double delta_next = second_next - frame;
+  return float((delta_prev < delta_next) ? second_prev : second_next);
 }
 
 void BKE_scene_remove_rigidbody_object(Main *bmain, Scene *scene, Object *ob, const bool free_us)
diff --git a/source/blender/blenkernel/intern/scene_test.cc b/source/blender/blenkernel/intern/scene_test.cc
new file mode 100644
index 00000000000..965f0855cf4
--- /dev/null
+++ b/source/blender/blenkernel/intern/scene_test.cc
@@ -0,0 +1,44 @@
+/* SPDX-FileCopyrightText: 2025 Blender Authors
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include "BKE_scene.hh"
+
+#include "DNA_scene_types.h"
+
+#include "testing/testing.h"
+
+namespace blender::bke::tests {
+
+TEST(scene, frame_snap_by_seconds)
+{
+  Scene fake_scene = {};
+
+  /* Regular 24 FPS snapping. */
+  fake_scene.r.frs_sec = 24;
+  fake_scene.r.frs_sec_base = 1.0;
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 47));
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 49));
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 59));
+  EXPECT_FLOAT_EQ(72.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 60));
+  EXPECT_FLOAT_EQ(9984.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 2.0, 10000.0));
+
+  /* 12 FPS snapping by incrementing the base. */
+  fake_scene.r.frs_sec = 24;
+  fake_scene.r.frs_sec_base = 2.0;
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 47));
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 49));
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 53));
+  EXPECT_FLOAT_EQ(60.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 54));
+  EXPECT_FLOAT_EQ(9996.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 1.0, 10000.0));
+
+  /* 0.1 FPS snapping to 2-second intervals. */
+  fake_scene.r.frs_sec = 1;
+  fake_scene.r.frs_sec_base = 10.0;
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 2.0, 48.0));
+  EXPECT_FLOAT_EQ(48.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 2.0, 48.1));
+  EXPECT_FLOAT_EQ(48.2, BKE_scene_frame_snap_by_seconds(&fake_scene, 2.0, 48.2));
+  EXPECT_FLOAT_EQ(10000.0, BKE_scene_frame_snap_by_seconds(&fake_scene, 2.0, 10000.0));
+}
+
+}  // namespace blender::bke::tests