diff --git a/eth_utils/currency.py b/eth_utils/currency.py
index b3b6a7af..f0590167 100644
--- a/eth_utils/currency.py
+++ b/eth_utils/currency.py
@@ -36,11 +36,11 @@ class denoms:
 MAX_WEI = 2**256 - 1
 
 
-def from_wei(number: int, unit: str) -> Union[int, decimal.Decimal]:
+def from_wei(number: int, unit: Union[str, int]) -> Union[int, decimal.Decimal]:
     """
     Takes a number of wei and converts it to any other ether unit.
     """
-    if unit.lower() not in units:
+    if is_string(number) and unit.lower() not in units:
         raise ValueError(
             "Unknown unit.  Must be one of {0}".format("/".join(units.keys()))
         )
@@ -51,7 +51,10 @@ def from_wei(number: int, unit: str) -> Union[int, decimal.Decimal]:
     if number < MIN_WEI or number > MAX_WEI:
         raise ValueError("value must be between 1 and 2**256 - 1")
 
-    unit_value = units[unit.lower()]
+    if is_integer(unit):
+        unit_value = decimal.Decimal(10) ** decimal.Decimal(unit)
+    else:
+        unit_value = units[unit.lower()]
 
     with localcontext() as ctx:
         ctx.prec = 999
@@ -61,11 +64,11 @@ def from_wei(number: int, unit: str) -> Union[int, decimal.Decimal]:
     return result_value
 
 
-def to_wei(number: Union[int, float, str, decimal.Decimal], unit: str) -> int:
+def to_wei(number: Union[int, float, str, decimal.Decimal], unit: Union[str, int]) -> int:
     """
     Takes a number of a unit and converts it to wei.
     """
-    if unit.lower() not in units:
+    if is_string(number) and unit.lower() not in units:
         raise ValueError(
             "Unknown unit.  Must be one of {0}".format("/".join(units.keys()))
         )
@@ -80,7 +83,11 @@ def to_wei(number: Union[int, float, str, decimal.Decimal], unit: str) -> int:
         raise TypeError("Unsupported type.  Must be one of integer, float, or string")
 
     s_number = str(number)
-    unit_value = units[unit.lower()]
+
+    if is_integer(unit):
+        unit_value = decimal.Decimal(10) ** decimal.Decimal(unit)
+    else:
+        unit_value = units[unit.lower()]
 
     if d_number == decimal.Decimal(0):
         return 0
diff --git a/tests/currency-utils/test_currency_tools.py b/tests/currency-utils/test_currency_tools.py
index 537bbb83..21c62584 100644
--- a/tests/currency-utils/test_currency_tools.py
+++ b/tests/currency-utils/test_currency_tools.py
@@ -116,6 +116,19 @@ def test_float_ether(value):
     assert from_wei(to_wei(value, "ether"), "ether") == decimal.Decimal(str(value))
 
 
+@pytest.mark.parametrize(
+    "value",
+    [
+        1,  # 1000000 wei
+        0.1,  # 100000 wei
+        0.01,  # 10000 wei
+        0.001,  # 1000 wei
+    ],
+)
+def test_float_usdt(value):
+    assert from_wei(to_wei(value, 6), 6) == decimal.Decimal(str(value))
+
+
 @pytest.mark.parametrize(
     "value",
     [