diff --git a/api/tests/test_fair_ontology.py b/api/tests/test_fair_ontology.py
index 6512fd1..8237811 100644
--- a/api/tests/test_fair_ontology.py
+++ b/api/tests/test_fair_ontology.py
@@ -66,6 +66,11 @@ def test_registration_unit_options(self):
         )
         self.assertEqual(infer_qudt("h")["qudt_unit"], QUDT_UNIT_BASE + "HR")
         self.assertEqual(infer_qudt("°")["qudt_unit"], QUDT_UNIT_BASE + "DEG")
+        self.assertEqual(
+            infer_qudt("g"),
+            {"qudt_unit": QUDT_UNIT_BASE + "GM",
+             "qudt_quantity_kind": QUDT_QK_BASE + "Mass"},
+        )
         self.assertEqual(
             infer_qudt("kg/s"),
             {"qudt_unit": QUDT_UNIT_BASE + "KiloGM-PER-SEC",
diff --git a/web/app/equipment/register/page.tsx b/web/app/equipment/register/page.tsx
index 02268c2..b22fbd0 100644
--- a/web/app/equipment/register/page.tsx
+++ b/web/app/equipment/register/page.tsx
@@ -45,6 +45,7 @@ const UNIT_OPTIONS = [
   { value: "Pa", label: "Pa" },
   { value: "sccm", label: "sccm" },
   { value: "SLPM", label: "SLPM" },
+  { value: "g", label: "g" },
   { value: "kg/s", label: "kg/s" },
   { value: "m^3/s", label: "m^3/s" },
   { value: "V", label: "V" },