diff --git a/tests/parser/functions/test_convert_to_bool.py b/tests/parser/functions/test_convert_to_bool.py
index fe09aab1e5..4ad05015bf 100644
--- a/tests/parser/functions/test_convert_to_bool.py
+++ b/tests/parser/functions/test_convert_to_bool.py
@@ -193,3 +193,30 @@ def foo() -> bool:
         lambda: get_contract_with_gas_estimation(code),
         TypeMismatchException
     )
+
+
+def test_convert_from_address(w3, get_contract_with_gas_estimation):
+    code = """
+@public
+def test_address_to_bool(val: address) -> bool:
+    temp: bool = convert(val, bool)
+    return temp
+
+@public
+def test_literal_zero_address() -> bool:
+    return convert(ZERO_ADDRESS, bool)
+
+@public
+def test_sender() -> bool:
+    return convert(msg.sender, bool)
+    """
+
+    a = w3.eth.accounts[0]
+    c = get_contract_with_gas_estimation(code)
+
+    assert c.test_address_to_bool((b'\x00' * 19) + (b'\x01')) is True
+    assert c.test_address_to_bool(a) is True
+    assert c.test_address_to_bool(b'\x00' * 20) is False
+
+    assert c.test_literal_zero_address() is False
+    assert c.test_sender() is True
diff --git a/tests/parser/functions/test_convert_to_decimal.py b/tests/parser/functions/test_convert_to_decimal.py
index d1b690f5d1..1864b9d135 100644
--- a/tests/parser/functions/test_convert_to_decimal.py
+++ b/tests/parser/functions/test_convert_to_decimal.py
@@ -169,3 +169,43 @@ def foobar() -> decimal:
         lambda: get_contract_with_gas_estimation(code),
         TypeMismatchException
     )
+
+
+def test_convert_from_address(get_contract_with_gas_estimation):
+    code = """
+stor: address
+
+@public
+def conv(param: address) -> decimal:
+    return convert(param, decimal)
+
+@public
+def conv_zero_literal() -> decimal:
+    return convert(ZERO_ADDRESS, decimal)
+
+@public
+def conv_zero_stor() -> decimal:
+    self.stor = ZERO_ADDRESS
+    return convert(self.stor, decimal)
+
+@public
+def conv_neg1_literal() -> decimal:
+    return convert(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF, decimal)
+
+@public
+def conv_neg1_stor() -> decimal:
+    self.stor = 0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF
+    return convert(self.stor, decimal)
+    """
+
+    c = get_contract_with_gas_estimation(code)
+    assert c.conv(b"\x00" * 20) == 0.0
+    assert c.conv_zero_literal() == 0.0
+    assert c.conv_zero_stor() == 0.0
+
+    assert c.conv(b"\xff" * 20) == -1.0
+    assert c.conv_neg1_literal() == -1.0
+    assert c.conv_neg1_stor() == -1.0
+
+    assert c.conv((b"\x00" * 19) + b"\x01") == 1.0
+    assert c.conv((b"\x00" * 18) + b"\x01\x00") == 256.0
diff --git a/tests/parser/functions/test_convert_to_int128.py b/tests/parser/functions/test_convert_to_int128.py
index 67dafb8ed6..e83583d204 100644
--- a/tests/parser/functions/test_convert_to_int128.py
+++ b/tests/parser/functions/test_convert_to_int128.py
@@ -2,6 +2,9 @@
     InvalidLiteralException,
     TypeMismatchException,
 )
+from vyper.utils import (
+    SizeLimits,
+)
 
 
 def test_convert_to_int128_units(get_contract, assert_tx_failed):
@@ -204,16 +207,6 @@ def test1():
     assert_tx_failed(lambda: c.test1())
 
 
-def test_convert_from_address(assert_compile_failed, get_contract_with_gas_estimation):
-    code = """
-@public
-def test2():
-    x: int128 = convert(msg.sender, int128)
-    """
-
-    assert_compile_failed(lambda: get_contract_with_gas_estimation(code), Exception)
-
-
 def test_convert_out_of_range_literal(assert_compile_failed, get_contract_with_gas_estimation):
     code = """
 @public
@@ -292,3 +285,107 @@ def foo() -> int128:
         lambda: get_contract_with_gas_estimation(code),
         InvalidLiteralException
     )
+
+
+def test_convert_from_address(w3, get_contract):
+    code = """
+stor: address
+
+@public
+def testCompiles():
+    x: int128 = convert(msg.sender, int128)
+
+@public
+def conv_neg1_stor() -> int128:
+    self.stor = 0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF
+    return convert(self.stor, int128)
+
+@public
+def conv_neg1_literal() -> int128:
+    return convert(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF, int128)
+
+@public
+def conv_neg1_stor_alt() -> int128:
+    self.stor = 0x00000000fFFFffffffFfFfFFffFfFffFFFfFffff
+    return convert(self.stor, int128)
+
+@public
+def conv_neg1_literal_alt() -> int128:
+    return convert(0x00000000fFFFffffffFfFfFFffFfFffFFFfFffff, int128)
+
+@public
+def conv_min_stor() -> int128:
+    self.stor = 0x0000000080000000000000000000000000000000
+    return convert(self.stor, int128)
+
+@public
+def conv_min_literal() -> int128:
+    return convert(0x0000000080000000000000000000000000000000, int128)
+
+@public
+def conv_min_stor_alt() -> int128:
+    self.stor = 0x1234567880000000000000000000000000000000
+    return convert(self.stor, int128)
+
+@public
+def conv_min_literal_alt() -> int128:
+    return convert(0x1234567880000000000000000000000000000000, int128)
+
+@public
+def conv_zero_stor() -> int128:
+    self.stor = ZERO_ADDRESS
+    return convert(self.stor, int128)
+
+@public
+def conv_zero_literal() -> int128:
+    return convert(ZERO_ADDRESS, int128)
+
+@public
+def conv_zero_stor_alt() -> int128:
+    self.stor = 0xffFFfFFf00000000000000000000000000000000
+    return convert(self.stor, int128)
+
+@public
+def conv_zero_literal_alt() -> int128:
+    return convert(0xffFFfFFf00000000000000000000000000000000, int128)
+
+@public
+def conv_max_stor() -> int128:
+    self.stor = 0xFffffFff7FFFFFFfFffFffFfFFffFffFFfFfffFF
+    return convert(self.stor, int128)
+
+@public
+def conv_max_literal() -> int128:
+    return convert(0xFffffFff7FFFFFFfFffFffFfFFffFffFFfFfffFF, int128)
+
+@public
+def conv_max_stor_alt() -> int128:
+    self.stor = 0x000000007FfFFffffFFFFfffffffFffFfFffffFF
+    return convert(self.stor, int128)
+
+@public
+def conv_max_literal_alt() -> int128:
+    return convert(0x000000007FfFFffffFFFFfffffffFffFfFffffFF, int128)
+    """
+
+    c = get_contract(code)
+
+    assert c.conv_neg1_stor() == -1
+    assert c.conv_neg1_literal() == -1
+    assert c.conv_neg1_stor_alt() == -1
+    assert c.conv_neg1_literal_alt() == -1
+
+    assert c.conv_min_stor() == SizeLimits.MINNUM
+    assert c.conv_min_literal() == SizeLimits.MINNUM
+    assert c.conv_min_stor_alt() == SizeLimits.MINNUM
+    assert c.conv_min_literal_alt() == SizeLimits.MINNUM
+
+    assert c.conv_zero_stor() == 0
+    assert c.conv_zero_literal() == 0
+    assert c.conv_zero_stor_alt() == 0
+    assert c.conv_zero_literal_alt() == 0
+
+    assert c.conv_max_stor() == SizeLimits.MAXNUM
+    assert c.conv_max_literal() == SizeLimits.MAXNUM
+    assert c.conv_max_stor_alt() == SizeLimits.MAXNUM
+    assert c.conv_max_literal_alt() == SizeLimits.MAXNUM
diff --git a/tests/parser/functions/test_convert_to_uint256.py b/tests/parser/functions/test_convert_to_uint256.py
index e2541f9f2d..f5c4e23533 100644
--- a/tests/parser/functions/test_convert_to_uint256.py
+++ b/tests/parser/functions/test_convert_to_uint256.py
@@ -112,6 +112,24 @@ def conv2() -> uint256:
 @public
 def conv3() -> uint256:
     return convert(0x744d70FDBE2Ba4CF95131626614a1763DF805B9E, uint256)
+
+@public
+def conv_max_stor() -> uint256:
+    self.stor_a = 0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF
+    return convert(self.stor_a, uint256)
+
+@public
+def conv_max_literal() -> uint256:
+    return convert(0xFFfFfFffFFfffFFfFFfFFFFFffFFFffffFfFFFfF, uint256)
+
+@public
+def conv_min_stor() -> uint256:
+    self.stor_a = ZERO_ADDRESS
+    return convert(self.stor_a, uint256)
+
+@public
+def conv_min_literal() -> uint256:
+    return convert(ZERO_ADDRESS, uint256)
     """
 
     c = get_contract(code)
@@ -119,6 +137,10 @@ def conv3() -> uint256:
     assert c.conv1(a) == int(a, 0)
     assert c.conv2() == 663969929716095361663590611662499625636445838238
     assert c.conv3() == 663969929716095361663590611662499625636445838238
+    assert c.conv_max_stor() == (2**160) - 1
+    assert c.conv_max_literal() == (2**160) - 1
+    assert c.conv_min_stor() == 0
+    assert c.conv_min_literal() == 0
 
 
 def test_convert_from_bool(get_contract_with_gas_estimation):
diff --git a/vyper/types/convert.py b/vyper/types/convert.py
index fc7e5c591b..9b48968aa2 100644
--- a/vyper/types/convert.py
+++ b/vyper/types/convert.py
@@ -28,7 +28,7 @@
 )
 
 
-@signature(('decimal', 'int128', 'uint256', 'bytes32', 'bytes'), '*')
+@signature(('decimal', 'int128', 'uint256', 'address', 'bytes32', 'bytes'), '*')
 def to_bool(expr, args, kwargs, context):
     in_arg = args[0]
     input_type, _ = get_type(in_arg)
@@ -57,7 +57,8 @@ def to_bool(expr, args, kwargs, context):
         )
 
 
-@signature(('num_literal', 'bool', 'decimal', 'uint256', 'bytes32', 'bytes', 'string'), '*')
+@signature(('num_literal', 'bool', 'decimal', 'uint256', 'address',
+            'bytes32', 'bytes', 'string'), '*')
 def to_int128(expr, args, kwargs, context):
     in_arg = args[0]
     input_type, _ = get_type(in_arg)
@@ -105,6 +106,21 @@ def to_int128(expr, args, kwargs, context):
                 pos=getpos(expr)
             )
 
+    elif input_type == 'address':
+        return LLLnode.from_list(
+            [
+                'signextend',
+                15,
+                [
+                    'and',
+                    in_arg,
+                    (SizeLimits.ADDRSIZE - 1)
+                ],
+            ],
+            typ=BaseType('int128', _unit),
+            pos=getpos(expr)
+        )
+
     elif input_type in ('string', 'bytes'):
         if in_arg.typ.maxlen > 32:
             raise TypeMismatchException(
@@ -221,7 +237,7 @@ def to_uint256(expr, args, kwargs, context):
         raise InvalidLiteralException("Invalid input for uint256: %r" % in_arg, expr)
 
 
-@signature(('bool', 'int128', 'uint256', 'bytes32', 'bytes'), '*')
+@signature(('bool', 'int128', 'uint256', 'bytes32', 'bytes', 'address'), '*')
 def to_decimal(expr, args, kwargs, context):
     in_arg = args[0]
     input_type, _ = get_type(in_arg)
@@ -267,6 +283,25 @@ def to_decimal(expr, args, kwargs, context):
                     pos=getpos(expr)
                 )
 
+        elif input_type == 'address':
+            return LLLnode.from_list(
+                [
+                    'mul',
+                    [
+                        'signextend',
+                        15,
+                        [
+                            'and',
+                            in_arg,
+                            (SizeLimits.ADDRSIZE - 1)
+                        ],
+                    ],
+                    DECIMAL_DIVISOR
+                ],
+                typ=BaseType('decimal', _unit, _positional),
+                pos=getpos(expr)
+            )
+
         elif input_type == 'bytes32':
             if in_arg.typ.is_literal:
                 if not SizeLimits.in_bounds('int128', (in_arg.value * DECIMAL_DIVISOR)):