diff --git a/src/main/scala/org/bitcoins/core/currency/CurrencyUnits.scala b/src/main/scala/org/bitcoins/core/currency/CurrencyUnits.scala
index 8f10173eef..52b4ff2fa7 100644
--- a/src/main/scala/org/bitcoins/core/currency/CurrencyUnits.scala
+++ b/src/main/scala/org/bitcoins/core/currency/CurrencyUnits.scala
@@ -1,5 +1,6 @@
 package org.bitcoins.core.currency
 
+import org.bitcoins.core.consensus.Consensus
 import org.bitcoins.core.number.{BaseNumbers, Int32, Int64, SignedNumber}
 import org.bitcoins.core.protocol.NetworkElement
 import org.bitcoins.core.serializers.{RawBitcoinSerializerHelper, RawSatoshisSerializer}
@@ -10,41 +11,48 @@ sealed trait CurrencyUnit extends NetworkElement with BitcoinSLogger {
   type A
   def underlying : A
 
+  def satoshis: Satoshis
+
   def >=(c : CurrencyUnit) : Boolean = {
-    CurrencyUnits.toSatoshis(this).underlying >= CurrencyUnits.toSatoshis(c).underlying
+    satoshis.underlying >= c.satoshis.underlying
   }
 
   def >(c : CurrencyUnit) : Boolean = {
-    CurrencyUnits.toSatoshis(this).underlying > CurrencyUnits.toSatoshis(c).underlying
+    satoshis.underlying > c.satoshis.underlying
   }
 
   def <(c : CurrencyUnit) : Boolean = {
-    CurrencyUnits.toSatoshis(this).underlying < CurrencyUnits.toSatoshis(c).underlying
+    satoshis.underlying < c.satoshis.underlying
   }
 
   def <=(c : CurrencyUnit) : Boolean = {
-    CurrencyUnits.toSatoshis(this).underlying <= CurrencyUnits.toSatoshis(c).underlying
+    satoshis.underlying <= c.satoshis.underlying
   }
 
   def !=(c : CurrencyUnit) : Boolean = !(this == c)
 
 
   def +(c : CurrencyUnit) : CurrencyUnit = {
-    Satoshis(CurrencyUnits.toSatoshis(this).underlying + CurrencyUnits.toSatoshis(c).underlying)
+    Satoshis(satoshis.underlying + c.satoshis.underlying)
   }
 
   def -(c : CurrencyUnit) : CurrencyUnit = {
-    Satoshis(CurrencyUnits.toSatoshis(this).underlying - CurrencyUnits.toSatoshis(c).underlying)
+    Satoshis(satoshis.underlying - c.satoshis.underlying)
   }
 
   def *(c : CurrencyUnit) : CurrencyUnit = {
-    Satoshis(CurrencyUnits.toSatoshis(this).underlying * CurrencyUnits.toSatoshis(c).underlying)
+    Satoshis(satoshis.underlying * c.satoshis.underlying)
+  }
+
+  def unary_- : CurrencyUnit = {
+    Satoshis(- satoshis.underlying)
   }
 }
 
 sealed trait Satoshis extends CurrencyUnit {
   override type A = Int64
   override def hex = RawSatoshisSerializer.write(this)
+  override def satoshis: Satoshis = this
 }
 
 object Satoshis extends Factory[Satoshis] with BaseNumbers[Satoshis] {
@@ -60,14 +68,41 @@ object Satoshis extends Factory[Satoshis] with BaseNumbers[Satoshis] {
   def apply(int64: Int64): Satoshis = SatoshisImpl(int64)
 }
 
-object CurrencyUnits {
-  def zero : CurrencyUnit = Satoshis.zero
-  def negativeSatoshi = Satoshis(Int64(-1))
-  /** The number you need to multiply BTC by to get it's satoshis */
-  def btcToSatoshiScalar = 100000000
+sealed trait Bitcoins extends CurrencyUnit {
+  override type A = BigDecimal
+  override def satoshis: Satoshis = {
+    val sat = underlying * CurrencyUnits.btcToSatoshiScalar
+    Satoshis(Int64(sat.toLongExact))
+  }
+  override def hex = satoshis.hex
+}
 
-  def oneBTC: CurrencyUnit = Satoshis(Int64(btcToSatoshiScalar))
-  def toSatoshis(unit : CurrencyUnit): Satoshis = unit match {
-    case x : Satoshis => x
+object Bitcoins extends BaseNumbers[Bitcoins] {
+  val min = Bitcoins((-Consensus.maxMoney).satoshis)
+  val max = Bitcoins(Consensus.maxMoney.satoshis)
+  val zero = Bitcoins(Satoshis.zero)
+  val one = Bitcoins(1)
+  private case class BitcoinsImpl(underlying: BigDecimal) extends Bitcoins
+
+  def apply(underlying: BigDecimal): Bitcoins = BitcoinsImpl(underlying)
+
+  def apply(satoshis: Satoshis): Bitcoins = {
+    val b = satoshis.underlying.underlying * CurrencyUnits.satoshisToBTCScalar
+    BitcoinsImpl(b)
+  }
+}
+
+
+object CurrencyUnits {
+  def zero: CurrencyUnit = Satoshis.zero
+  def negativeSatoshi = Satoshis(Int64(-1))
+  /** The number you need to multiply BTC by to get it's satoshis */
+  def btcToSatoshiScalar: Long = 100000000
+  def satoshisToBTCScalar: BigDecimal = BigDecimal(1.0) / btcToSatoshiScalar
+  def oneBTC: CurrencyUnit = Satoshis(Int64(btcToSatoshiScalar))
+
+  def toSatoshis(unit : CurrencyUnit): Satoshis = unit match {
+    case b: Bitcoins => b.satoshis
+    case x: Satoshis => x
   }
 }
diff --git a/src/main/scala/org/bitcoins/core/number/NumberType.scala b/src/main/scala/org/bitcoins/core/number/NumberType.scala
index 6f60bff7a8..879df89597 100644
--- a/src/main/scala/org/bitcoins/core/number/NumberType.scala
+++ b/src/main/scala/org/bitcoins/core/number/NumberType.scala
@@ -82,6 +82,8 @@ sealed trait UInt32 extends UnsignedNumber with NumberOperations[UInt32] {
 
   def & (num : UInt32) : UInt32 = UInt32(underlying & num.underlying)
 
+
+
   override def hex = BitcoinSUtil.encodeHex(underlying).slice(8,16)
 
   override def toInt = {
@@ -207,6 +209,7 @@ sealed trait Int32 extends SignedNumber with NumberOperations[Int32] {
 
   override def <= (num : Int32): Boolean = underlying <= num.underlying
 
+  def unary_- : Int32 = Int32(-underlying)
   def | (num : Int32) : Int32 = Int32(underlying | num.underlying)
 
   def & (num : Int32) : Int32 = Int32(underlying & num.underlying)
@@ -261,6 +264,8 @@ sealed trait Int64 extends SignedNumber with NumberOperations[Int64] {
 
   override def <= (num : Int64): Boolean = underlying <= num.underlying
 
+  def unary_- : Int64 = Int64(-underlying)
+
   def | (num : Int64) : Int64 = Int64(underlying | num.underlying)
 
   def & (num : Int64) : Int64 = Int64(underlying & num.underlying)
diff --git a/src/test/scala/org/bitcoins/core/number/Int32Spec.scala b/src/test/scala/org/bitcoins/core/number/Int32Spec.scala
index 3b9e200937..b74a0569df 100644
--- a/src/test/scala/org/bitcoins/core/number/Int32Spec.scala
+++ b/src/test/scala/org/bitcoins/core/number/Int32Spec.scala
@@ -1,6 +1,7 @@
 package org.bitcoins.core.number
 
 import org.bitcoins.core.gen.NumberGenerator
+import org.bitcoins.core.util.BitcoinSLogger
 import org.scalacheck.{Prop, Properties}
 
 import scala.util.Try
@@ -8,8 +9,7 @@ import scala.util.Try
 /**
   * Created by chris on 6/21/16.
   */
-class Int32Spec extends Properties("Int32Spec") {
-
+class Int32Spec extends Properties("Int32Spec") with BitcoinSLogger {
 
   property("Serialization symmetry") =
     Prop.forAll(NumberGenerator.int32s) { int32: Int32 =>
@@ -86,4 +86,10 @@ class Int32Spec extends Properties("Int32Spec") {
     Prop.forAll(NumberGenerator.int32s, NumberGenerator.int32s) { (num1: Int32, num2: Int32) =>
       Int32(num1.underlying & num2.underlying) == (num1 & num2)
     }
+
+  property("negation") = {
+    Prop.forAll(NumberGenerator.int32s) { int32 =>
+      -int32 == Int32(-int32.underlying)
+    }
+  }
 }
diff --git a/src/test/scala/org/bitcoins/core/number/Int64Spec.scala b/src/test/scala/org/bitcoins/core/number/Int64Spec.scala
index 277c4553a2..16753a6d5b 100644
--- a/src/test/scala/org/bitcoins/core/number/Int64Spec.scala
+++ b/src/test/scala/org/bitcoins/core/number/Int64Spec.scala
@@ -86,5 +86,12 @@ class Int64Spec extends Properties("Int64Spec") {
     Prop.forAll(NumberGenerator.int64s, NumberGenerator.int64s) { (num1: Int64, num2: Int64) =>
       Int64(num1.underlying & num2.underlying) == (num1 & num2)
     }
+
+  property("negation") = {
+    Prop.forAll(NumberGenerator.int64s) { int64 =>
+      -int64 == Int64(-int64.underlying)
+    }
+  }
+
 }