diff --git a/src/engine/unitdata.ts b/src/engine/unitdata.ts
index 7c5c372..7b6692e 100644
--- a/src/engine/unitdata.ts
+++ b/src/engine/unitdata.ts
@@ -44,6 +44,7 @@ export const UNIT_DATA: UnitData[] = [
   // Volume (base: m³)
   { id: "litre", category: "Volume", dimension: "volume", ratio: "0.001", prefixes: "si" },
   { id: "cup", category: "Volume", dimension: "volume", ratio: "0.0002365882365" },
+  { id: "floz", category: "Volume", dimension: "volume", ratio: "0.0000295735295625" },
   { id: "tablespoon", category: "Volume", dimension: "volume", ratio: "0.0000147867647825" },
   { id: "teaspoon", category: "Volume", dimension: "volume", ratio: "0.00000492892159375" },
   { id: "quart", category: "Volume", dimension: "volume", ratio: "0.000946352946" },
diff --git a/src/engine/vocab-data.ts b/src/engine/vocab-data.ts
index 81f3d2c..2663d95 100644
--- a/src/engine/vocab-data.ts
+++ b/src/engine/vocab-data.ts
@@ -523,6 +523,8 @@ export const EN: VocabLocale = {
     "cbinch.variants": "c.i.,CI,cui,cu inch",
     "cup.format": "cup",
     "cup.variants": "cup,cups",
+    "floz.format": "fl oz",
+    "floz.variants": "fl oz,fl. oz.,floz,fluid ounce,fluid ounces",
     "gallon.format": "gal.",
     "gallon.variants": "gallon,gallons,gal.,gal",
     "litre.format": "L",
@@ -989,6 +991,8 @@ export const RU: VocabLocale = {
     "cbinch.variants": "дюйм³",
     "cup.format": "чаш.",
     "cup.variants": "чашка,чашек,чашках,чашку,чашкам,чаш.,чашк,чашк.,чаш,чашки",
+    "floz.format": "жидк. унц.",
+    "floz.variants": "жидкая унция,жидкие унции,жидких унций,жидкую унцию,жидк. унц.",
     "gallon.format": "гал.",
     "gallon.variants": "галлон,гал.,гал,галлона,галлонов,галлонах,галлоне",
     "litre.format": "л",