diff --git a/core/base/src/main/res/values/strings.xml b/core/base/src/main/res/values/strings.xml
index 8f2d9572..1ddab2a9 100644
--- a/core/base/src/main/res/values/strings.xml
+++ b/core/base/src/main/res/values/strings.xml
@@ -78,6 +78,8 @@
     <string name="electron_mass_rest_short">me</string>
     <string name="atomic_mass_unit">Dalton</string>
     <string name="atomic_mass_unit_short">u</string>
+    <string name="microgram">Microgram</string>
+    <string name="microgram_short">µg</string>
     <string name="milligram">Milligram</string>
     <string name="milligram_short">mg</string>
     <string name="gram">Gram</string>
diff --git a/data/units/src/main/java/com/sadellie/unitto/data/units/MyUnitIDS.kt b/data/units/src/main/java/com/sadellie/unitto/data/units/MyUnitIDS.kt
index 686b4149..85360a50 100644
--- a/data/units/src/main/java/com/sadellie/unitto/data/units/MyUnitIDS.kt
+++ b/data/units/src/main/java/com/sadellie/unitto/data/units/MyUnitIDS.kt
@@ -55,6 +55,7 @@ object MyUnitIDS {
     // MASS
     const val electron_mass_rest = "electron_mass_rest"
     const val atomic_mass_unit = "atomic_mass_unit"
+    const val microgram = "microgram"
     const val milligram = "milligram"
     const val gram = "gram"
     const val kilogram = "kilogram"
diff --git a/data/units/src/main/java/com/sadellie/unitto/data/units/collections/Mass.kt b/data/units/src/main/java/com/sadellie/unitto/data/units/collections/Mass.kt
index b4cfc0af..4f10d33c 100644
--- a/data/units/src/main/java/com/sadellie/unitto/data/units/collections/Mass.kt
+++ b/data/units/src/main/java/com/sadellie/unitto/data/units/collections/Mass.kt
@@ -29,6 +29,7 @@ internal val massCollection: List<AbstractUnit> by lazy {
     listOf(
         DefaultUnit(MyUnitIDS.electron_mass_rest, BigDecimal.valueOf(9.1093897E-28), UnitGroup.MASS, R.string.electron_mass_rest, R.string.electron_mass_rest_short),
         DefaultUnit(MyUnitIDS.atomic_mass_unit,   BigDecimal.valueOf(1.6605402E-24), UnitGroup.MASS, R.string.atomic_mass_unit,   R.string.atomic_mass_unit_short),
+        DefaultUnit(MyUnitIDS.microgram,          BigDecimal(1E-6),                  UnitGroup.MASS, R.string.microgram,          R.string.microgram_short),
         DefaultUnit(MyUnitIDS.milligram,          BigDecimal.valueOf(1E-3),          UnitGroup.MASS, R.string.milligram,          R.string.milligram_short),
         DefaultUnit(MyUnitIDS.gram,               BigDecimal.valueOf(1),             UnitGroup.MASS, R.string.gram,               R.string.gram_short),
         DefaultUnit(MyUnitIDS.kilogram,           BigDecimal.valueOf(1E+3),          UnitGroup.MASS, R.string.kilogram,           R.string.kilogram_short),
diff --git a/data/units/src/test/java/com/sadellie/unitto/data/units/AllUnitsTest.kt b/data/units/src/test/java/com/sadellie/unitto/data/units/AllUnitsTest.kt
index c1a58709..314db4d2 100644
--- a/data/units/src/test/java/com/sadellie/unitto/data/units/AllUnitsTest.kt
+++ b/data/units/src/test/java/com/sadellie/unitto/data/units/AllUnitsTest.kt
@@ -183,6 +183,7 @@ class AllUnitsTest {
     fun testMass() = testWithUnits {
         electron_mass_rest.checkWith(milligram, "1500000000000000000", "0.000001")
         atomic_mass_unit.checkWith(electron_mass_rest, "150", "273433.27951")
+        microgram.checkWith(gram, "1500", "0.0015")
         milligram.checkWith(ounce, "1500", "0.05291")
         gram.checkWith(ounce, "1500", "52.91094")
         kilogram.checkWith(carat, "1500", "7500000")