diff --git a/imap_processing/hit/l1b/hit_l1b.py b/imap_processing/hit/l1b/hit_l1b.py
index b170a1799a..0663ce37a0 100644
--- a/imap_processing/hit/l1b/hit_l1b.py
+++ b/imap_processing/hit/l1b/hit_l1b.py
@@ -16,7 +16,6 @@
 from imap_processing.hit.l1b.constants import (
     FILLVAL_FLOAT32,
     FILLVAL_INT64,
-    LIVESTIM_PULSES,
     SECTORS,
     SUMMED_PARTICLE_ENERGY_RANGE_MAPPING,
 )
@@ -108,8 +107,18 @@ def process_science_data(
     logical_source = None
 
     # Calculate fractional livetime from the livetime counter
-    livetime = l1a_counts_dataset["livetime_counter"] / LIVESTIM_PULSES
-    livetime = livetime.rename("livetime")
+    livetime = l1a_counts_dataset["livetime_counter"]
+    livetime_fraction = xr.zeros_like(livetime, dtype=np.float32)
+
+    # Equation 8 in section 6.2 of the algorithm document
+    livetime1 = livetime <= 4101
+    livetime2 = (livetime > 4101) & (livetime <= 16000)
+    livetime3 = livetime > 16000
+    livetime_fraction[livetime1] = livetime[livetime1] * 3.41e-5 + 0.14
+    livetime_fraction[livetime2] = livetime[livetime2] * 6.827e-5
+    livetime_fraction[livetime3] = livetime[livetime3] * 1.04e-9
+
+    livetime = livetime_fraction.rename("livetime")
 
     # Process counts data to an L1B dataset based on the descriptor
     if descriptor == "standard-rates":