diff --git a/Sources/Units/Units.swift b/Sources/Units/Units.swift
index 2f23759..d75c39b 100644
--- a/Sources/Units/Units.swift
+++ b/Sources/Units/Units.swift
@@ -340,28 +340,36 @@ public struct UnitValue<ValueType: ConvertibleToDouble>:
 	}
 
 	/// The result will have the `unit` of the left hand side value.
-	public static func - <T: Numeric>(lhs: UnitValue<T>, rhs: UnitValue<T>)
+	public static func - <T: ConvertibleToDouble>(
+		lhs: UnitValue<T>, rhs: UnitValue<T>
+	)
 		-> UnitValue<Double>
 	{
 		(lhs.value - rhs.value)[lhs.unit]
 	}
 
 	/// The result will have the `unit` of the left hand side value.
-	public static func + <T: Numeric>(lhs: UnitValue<T>, rhs: UnitValue<T>)
+	public static func + <T: ConvertibleToDouble>(
+		lhs: UnitValue<T>, rhs: UnitValue<T>
+	)
 		-> UnitValue<Double>
 	{
 		(lhs.value + rhs.value)[lhs.unit]
 	}
 
 	/// The result will have the `unit` of the left hand side value.
-	public static func * <T: Numeric>(lhs: UnitValue<T>, rhs: UnitValue<T>)
+	public static func * <T: ConvertibleToDouble>(
+		lhs: UnitValue<T>, rhs: UnitValue<T>
+	)
 		-> UnitValue<Double>
 	{
 		(lhs.value * rhs.value)[lhs.unit]
 	}
 
 	/// The result will have the `unit` of the left hand side value.
-	public static func / <T: Numeric>(lhs: UnitValue<T>, rhs: UnitValue<T>)
+	public static func / <T: ConvertibleToDouble>(
+		lhs: UnitValue<T>, rhs: UnitValue<T>
+	)
 		-> UnitValue<Double>
 	{
 		guard rhs.value != 0 else {