diff --git a/packages/squiggle-lang/__tests__/Reducer/Reducer_Peggy/Reducer_Peggy_ToExpression_test.res b/packages/squiggle-lang/__tests__/Reducer/Reducer_Peggy/Reducer_Peggy_ToExpression_test.res
index fa6c58f9..81bafd97 100644
--- a/packages/squiggle-lang/__tests__/Reducer/Reducer_Peggy/Reducer_Peggy_ToExpression_test.res
+++ b/packages/squiggle-lang/__tests__/Reducer/Reducer_Peggy/Reducer_Peggy_ToExpression_test.res
@@ -217,8 +217,4 @@ describe("Peggy to Expression", () => {
       (),
     )
   })
-
-  describe("unit", () => {
-    testToExpression("1m", "(:$$_block_$$ (:multiply 1 (:$valueOfUnit 'm')))", ~v="1", ())
-  })
 })
diff --git a/packages/squiggle-lang/src/rescript/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn.res b/packages/squiggle-lang/src/rescript/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn.res
index 1ab8d559..141b4a37 100644
--- a/packages/squiggle-lang/src/rescript/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn.res
+++ b/packages/squiggle-lang/src/rescript/Reducer/Reducer_Dispatch/Reducer_Dispatch_BuiltIn.res
@@ -129,23 +129,6 @@ let callInternal = (call: functionCall, environment, reducer: ExpressionT.reduce
     )
   }
 
-  let doValueOfUnit = (aUnit: string) =>
-    switch aUnit {
-    | "nm" => 0.000000001->EvNumber->Ok
-    | "um" => 0.000001->EvNumber->Ok
-    | "mm" => 0.001->EvNumber->Ok
-    | "cm" => 0.01->EvNumber->Ok
-    | "dm" => 0.1->EvNumber->Ok
-    | "m" => 1.->EvNumber->Ok
-    | "dam" => 10.->EvNumber->Ok
-    | "hm" => 100.->EvNumber->Ok
-    | "km" => 1000.->EvNumber->Ok
-    | "Mm" => 1000000.->EvNumber->Ok
-    | "Gm" => 1000000000.->EvNumber->Ok
-    | "Tm" => 1000000000000.->EvNumber->Ok
-    | _ => REUnitNotFound(aUnit)->Error
-    }
-
   switch call {
   | ("$_atIndex_$", [EvArray(aValueArray), EvNumber(fIndex)]) => arrayAtIndex(aValueArray, fIndex)
   | ("$_atIndex_$", [EvRecord(dict), EvString(sIndex)]) => recordAtIndex(dict, sIndex)
@@ -154,7 +137,6 @@ let callInternal = (call: functionCall, environment, reducer: ExpressionT.reduce
   | ("$_exportBindings_$", [EvRecord(externalBindings)]) => doExportBindings(externalBindings)
   | ("$_setBindings_$", [EvRecord(externalBindings), EvSymbol(symbol), value]) =>
     doSetBindings(externalBindings, symbol, value)
-  | ("$valueOfUnit", [EvString(aUnit)]) => doValueOfUnit(aUnit)
   | ("inspect", [value, EvString(label)]) => inspectLabel(value, label)
   | ("inspect", [value]) => inspect(value)
   | ("keep", [EvArray(aValueArray), EvLambda(aLambdaValue)]) =>