diff --git a/dcicutils/misc_utils.py b/dcicutils/misc_utils.py
index f11a1603c..b46b8bede 100644
--- a/dcicutils/misc_utils.py
+++ b/dcicutils/misc_utils.py
@@ -1005,16 +1005,12 @@ def to_integer(value: str, fallback: Optional[Any] = None, strict: bool = False)
 
 _MULTIPLIER_SUFFIXES = {
     "K": _MULTIPLIER_K,
-    "Kb": _MULTIPLIER_K,
     "KB": _MULTIPLIER_K,
     "M": _MULTIPLIER_M,
-    "Mb": _MULTIPLIER_M,
     "MB": _MULTIPLIER_M,
     "G": _MULTIPLIER_G,
-    "Gb": _MULTIPLIER_G,
     "GB": _MULTIPLIER_G,
     "T": _MULTIPLIER_T,
-    "Tb": _MULTIPLIER_T,
     "TB": _MULTIPLIER_T
 }
 
@@ -1051,8 +1047,9 @@ def to_number(value: str,
             return fallback
 
     if allow_multiplier_suffix is True:
+        value_upper = value.upper()
         for suffix in _MULTIPLIER_SUFFIXES:
-            if value.endswith(suffix):
+            if value_upper.endswith(suffix):
                 value_multiplier *= _MULTIPLIER_SUFFIXES[suffix]
                 if not (value := value[:-len(suffix)].strip()):
                     return fallback
diff --git a/pyproject.toml b/pyproject.toml
index b76de206c..6486d1494 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "dcicutils"
-version = "8.13.3.1b23"  # TODO: To become 8.14.0
+version = "8.13.3.1b24"  # TODO: To become 8.14.0
 description = "Utility package for interacting with the 4DN Data Portal and other 4DN resources"
 authors = ["4DN-DCIC Team <support@4dnucleome.org>"]
 license = "MIT"
diff --git a/test/test_misc_utils.py b/test/test_misc_utils.py
index 83216da5d..5a4262d47 100644
--- a/test/test_misc_utils.py
+++ b/test/test_misc_utils.py
@@ -3734,13 +3734,13 @@ def test_to_number():
     assert to_number("1,234,567") is None
     assert to_number("27500") == 27500
     assert to_number("789", allow_float=True) == 789.0
-    # assert type(to_number("789", allow_float=True)) == float
+    assert type(to_number("789", allow_float=True)) == int
     assert to_number("27500", allow_commas=True) == 27500
     assert to_number("1,234,567", allow_commas=True) == 1234567
     assert to_number("1234.0567", allow_float=True) == 1234.0567
     assert to_number("1K", allow_multiplier_suffix=True) == 1000
     assert to_number("1Kb", allow_multiplier_suffix=True) == 1000
-    assert to_number("1KB", allow_multiplier_suffix=True) == 1000
+    assert to_number("1kB", allow_multiplier_suffix=True) == 1000
     assert to_number("2M", allow_multiplier_suffix=True) == 2000000
     assert to_number("2Mb", allow_multiplier_suffix=True) == 2000000
     assert to_number("2MB", allow_multiplier_suffix=True) == 2000000
@@ -3750,7 +3750,6 @@ def test_to_number():
     assert to_number("4T", allow_multiplier_suffix=True) == 4000000000000
     assert to_number("4Tb", allow_multiplier_suffix=True) == 4000000000000
     assert to_number("4TB", allow_multiplier_suffix=True) == 4000000000000
-    assert to_number("4k", allow_multiplier_suffix=True) is None
     assert to_number("1,234,567K", allow_commas=True) is None
     assert to_number("1,234,567K", allow_commas=True, allow_multiplier_suffix=True) == 1234567000
     assert to_number("-1,234,567K", allow_commas=True, allow_multiplier_suffix=True) == -1234567000