diff --git a/src/diffusers/pipelines/ltx/pipeline_ltx.py b/src/diffusers/pipelines/ltx/pipeline_ltx.py
index 6f3faed8ff72..c3bc98b46e7c 100644
--- a/src/diffusers/pipelines/ltx/pipeline_ltx.py
+++ b/src/diffusers/pipelines/ltx/pipeline_ltx.py
@@ -74,10 +74,18 @@ def calculate_shift(
     base_shift: float = 0.5,
     max_shift: float = 1.15,
 ):
+    if (
+        base_seq_len is _DEFAULT_BASE_SEQ_LEN and
+        max_seq_len is _DEFAULT_MAX_SEQ_LEN and
+        base_shift is _DEFAULT_BASE_SHIFT and
+        max_shift is _DEFAULT_MAX_SHIFT
+    ):
+        # Fast path for defaults
+        return image_seq_len * _m_DEFAULT + _b_DEFAULT
+
+    # Fallback for non-defaults (kept as a one-liner for efficiency)
     m = (max_shift - base_shift) / (max_seq_len - base_seq_len)
-    b = base_shift - m * base_seq_len
-    mu = image_seq_len * m + b
-    return mu
+    return image_seq_len * m + (base_shift - m * base_seq_len)
 
 
 # Copied from diffusers.pipelines.stable_diffusion.pipeline_stable_diffusion.retrieve_timesteps
@@ -799,3 +807,15 @@ def __call__(
             return (video,)
 
         return LTXPipelineOutput(frames=video)
+
+_DEFAULT_BASE_SEQ_LEN = 256
+
+_DEFAULT_MAX_SEQ_LEN = 4096
+
+_DEFAULT_BASE_SHIFT = 0.5
+
+_DEFAULT_MAX_SHIFT = 1.15
+
+_m_DEFAULT = (_DEFAULT_MAX_SHIFT - _DEFAULT_BASE_SHIFT) / (_DEFAULT_MAX_SEQ_LEN - _DEFAULT_BASE_SEQ_LEN)
+
+_b_DEFAULT = _DEFAULT_BASE_SHIFT - _m_DEFAULT * _DEFAULT_BASE_SEQ_LEN